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1. Long-term fertilisation strategies and form affect nutrient budgets and soil test values, soil carbon retention and crop yield resilience

Author:
Magid, Jakob,   et al.   ; van der Bom, Frederik; Jensen, Lars Stoumann;     Show all 3 Authors
Source:
Plant and soil 2019 v.434 no.1-2 pp. 47-64
ISSN:
0032-079X
Subject:
animal manures; cold; cold stress; crop yield; crops; exchangeable potassium; fertilizer application; models; nutrient availability; nutrient use efficiency; nutrients; organic fertilizers; phosphorus; slurries; soil; soil carbon; soil fertility; soil test values; spring barley; temperature; Denmark
Abstract:
... AIMS: The aim of this study was to evaluate the effects of long-term mineral and organic fertilisation on crop performance and soil fertility. METHODS: The Long-Term Nutrient Depletion Trial (Denmark) was used to analyse changes in concentrations of Olsen-P, exchangeable potassium (K) and soil carbon (C). Yield responses (2010–2016) were evaluated making use of an early-season temperature model, f ...
DOI:
10.1007/s11104-018-3754-y

2. Phosphorus characterization and plant availability in soil profiles after long-term urban waste application

Author:
Magid, Jakob,   et al.   ; Glæsner, Nadia; van der Bom, Frederik; Bruun, Sander; McLaren, Timothy; Larsen, Flemming Hofmann;     Show all 6 Authors
Source:
Geoderma 2019 v.338 pp. 136-144
ISSN:
0016-7061
Subject:
X-ray absorption spectroscopy; agricultural land; calcium; composts; iron; manure amendments; mineral fertilizers; nuclear magnetic resonance spectroscopy; phosphorus; recycling; sewage sludge; soil profiles; stable isotopes; sustainable agriculture
Abstract:
... Recycling of waste products to agricultural fields is important for sustainable crop production, particularly for managing phosphorus (P). How different forms of waste affect the accumulation, transformation and plant availability of P in soil is therefore of major interest. A long-term experimental field that assesses conventional fertilizers with that of urban wastes was analyzed for P accumulat ...
DOI:
10.1016/j.geoderma.2018.11.046

3. Residual phosphorus availability after long-term soil application of organic waste

Author:
Magid, Jakob,   et al.   ; Lemming, Camilla; Oberson, Astrid; Bruun, Sander; Scheutz, Charlotte; Frossard, Emmanuel; Jensen, Lars Stoumann;     Show all 7 Authors
Source:
Agriculture, ecosystems & environment 2019 v.270-271 pp. 65-75
ISSN:
0167-8809
Subject:
cattle manure; composts; crop production; field experimentation; nitrogen; nutrient offtake; phosphorus; sewage sludge; soil profiles; soil treatment; topsoil; water solubility
Abstract:
... Phosphorus (P) accumulated in soil after surplus P applications can potentially serve as a P source for subsequent crop production. This study investigated residual P availability after long-term surplus P application with different organic waste products. Topsoil samples from a long-term field trial treated with different types of organic wastes were subjected to P characterization, including det ...
DOI:
10.1016/j.agee.2018.10.009

4. Seed treatment with Penicillium sp. or Mn/Zn can alleviate the negative effects of cold stress in maize grown in soils dependent on soil fertility

Author:
Magid, Jakob,   et al.   ; Gómez‐Muñoz, Beatriz; Lekfeldt, Jonas D. S.; Jensen, Lars Stoumann; de Neergaard, Andreas;     Show all 5 Authors
Source:
Journal of agronomy and crop science 2018 v.204 no.6 pp. 603-612
ISSN:
0931-2250
Subject:
Penicillium; biomass production; cold; cold stress; corn; fungi; manganese; nutrient uptake; oxidative stress; phosphorus; plant damage; salicylic acid; seed inoculation; seed treatment; seeds; soil; soil fertility; sowing; spring; temperature; triple superphosphate; zinc; Northern European region
Abstract:
... Maize is becoming an increasingly important crop in northern Europe, but low temperatures during spring may hamper its growth. This effect may be caused by direct plant damage through oxidative stress or indirect damage through decreased uptake of nutrients, especially phosphorus (P), from the soil. Previous studies have indicated that treatment with micronutrients such as manganese and zinc (Mn/Z ...
DOI:
10.1111/jac.12288

5. Life cycle inventory modeling of phosphorus substitution, losses and crop uptake after land application of organic waste products

Author:
Magid, Jakob,   et al.   ; ten Hoeve, Marieke; Bruun, Sander; Naroznova, Irina; Lemming, Camilla; Jensen, Lars S.; Scheutz, Charlotte;     Show all 7 Authors
Source:
The international journal of life cycle assessment 2018 v.23 no.10 pp. 1950-1965
ISSN:
0948-3349
Subject:
agricultural land; case studies; climate change; environmental impact; eutrophication; farms; fertilizer application; freshwater; land application; life cycle inventory; livestock and meat industry; models; organic wastes; phosphorus; phosphorus fertilizers; sewage sludge; sewage treatment; soil; swine
Abstract:
... PURPOSE: Life cycle assessments (LCAs) that attempt to provide advice on treatment options for phosphorus (P) containing organic waste products encounter problems related to the quantification of mineral P fertilizer substitution, P loss and crop P uptake after land application. The purpose of this study was to develop a relatively easy to use life cycle inventory model, known as PLCI, that could ...
DOI:
10.1007/s11367-017-1421-9

6. Nutrient uptake efficiency in ryegrass fertilized with dried digestate solids as affected by acidification and drying temperature

Author:
Magid, Jakob,   et al.   ; Pantelopoulos, Athanasios; Jensen, Lars Stoumann; Fangueiro, David;     Show all 4 Authors
Source:
Plant and soil 2017 v.421 no.1-2 pp. 401-416
ISSN:
0032-079X
Subject:
Lolium; acidification; ammonium nitrogen; buffering capacity; drying; drying temperature; fertilizer application; mineralization; nitrogen; nitrogen fertilizers; nutrient uptake; pH; phosphorus; plant growth; soil; stable isotopes
Abstract:
... AIMS: To evaluate the efficiency of acidified (to pH 5.5) and dried digestate solids as a fertilization product in a pot experiment with ryegrass. METHODS: The NH₄-N pool of the solids was labelled with ¹⁵N prior to acidification and drying to estimate plant N uptake efficiency. The effect of digestate solids on plant growth and N and P uptake was compared to the effect of different mineral N-P fe ...
DOI:
10.1007/s11104-017-3463-y

7. Plant availability of phosphorus from dewatered sewage sludge, untreated incineration ashes, and other products recovered from a wastewater treatment system

Author:
Magid, Jakob,   et al.   ; Lemming, Camilla; Bruun, Sander; Jensen, Lars Stoumann;     Show all 4 Authors
Source:
Zeitschrift für Pflanzenernährung und Bodenkunde 2017 v.180 no.6 pp. 779-787
ISSN:
1436-8730
Subject:
Hordeum vulgare; magnesium ammonium phosphate; phosphorus; phosphorus fertilizers; sewage sludge; sewage treatment; sludge ash; soil; spring barley; triple superphosphate; wastewater treatment; Denmark
Abstract:
... The objective of the present study was to evaluate the plant phosphorus (P) availability of products derived from new P‐recovery technologies deployed in wastewater treatment systems against sewage sludge and untreated sewage sludge ashes. Eight P sources were evaluated in a six‐week pot experiment with spring barley (Hordeum vulgare L.) and a soil incubation experiment with anaerobically digested ...
DOI:
10.1002/jpln.201700206

8. Long-term P and K fertilisation strategies and balances affect soil availability indices, crop yield depression risk and N use

Author:
Magid, Jakob,   et al.   ; van der Bom, Frederik; Jensen, Lars Stoumann;     Show all 3 Authors
Source:
European journal of agronomy 2017 v.86 pp. 12-23
ISSN:
1161-0301
Subject:
animal manures; climate change; crop yield; exchangeable potassium; fertilizer application; laws and regulations; long term effects; nitrogen; nutrient availability; phosphorus; plant establishment; potassium fertilizers; regression analysis; residual effects; risk; soil; spring; summer; temperature; weather
Abstract:
... The last century has seen a large increase of fertiliser use, along with a subsequent rise of crop productivity. However, in many places its intensive use has become a burden to the environment, and legislation has been introduced to restrict nutrient applications. In combination with changing production scenarios as a result of climate change, this means an improved understanding is needed of how ...
DOI:
10.1016/j.eja.2017.02.006

9. Nitrogen turnover, crop use efficiency and soil fertility in a long-term field experiment amended with different qualities of urban and agricultural waste

Author:
Magid, Jakob,   et al.   ; Gómez-Muñoz, Beatriz; Jensen, Lars Stoumann;     Show all 3 Authors
Source:
Agriculture, ecosystems & environment 2017 v.240 pp. 300-313
ISSN:
0167-8809
Subject:
NPK fertilizers; adverse effects; application rate; carbon; cattle; cattle manure; composts; field experimentation; humans; mineral fertilizers; mineralization; nitrogen; nutrient use efficiency; nutrients; organic matter; recycling; sewage sludge; soil; soil amendments; soil fertility; urine; Denmark
Abstract:
... Organic wastes contain significant amounts of organic matter and nutrients and their recycling into agriculture can potentially contribute to closing the natural ecological cycle. The aim of this study was to evaluate the improvement in overall soil fertility and soil nitrogen (N) supply capacity in a long-term field experiment with repeated application of different urban and agricultural organic ...
DOI:
10.1016/j.agee.2017.01.030

10. Genotypic differences in growth, yield and nutrient accumulation of spring wheat cultivars in response to long-term soil fertility regimes Section B Soil and plant science

Author:
Magid, Jakob,   et al.   ; Wang, Yaosheng; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann;     Show all 4 Authors
Source:
Acta agriculturæ Scandinavica 2017 v.67 no.2 pp. 126-133
ISSN:
1651-1913
Subject:
biomass; canopy; cultivars; fertilizer application; field experimentation; genotype; grain yield; leaves; nitrogen; nitrogen fertilizers; phosphorus; roots; shoots; soil fertility; spring wheat
Abstract:
... Determining genotypic responses to soil fertility may assist selection of cultivars that can be adapted to varied soil fertility regimes, and such selection under field conditions is still limited. A two-year field experiment was conducted in long-term field trials to investigate wheat genotype effects on early growth, yield and nutrient accumulation as affected by varied long-term soil fertility ...
DOI:
10.1080/09064710.2016.1229018

11. Long-term fertilisation form, level and duration affect the diversity, structure and functioning of soil microbial communities in the field

Author:
Magid, Jakob,   et al.   ; van der Bom, Frederik; Nunes, Inês; Raymond, Nelly Sophie; Hansen, Veronika; Bonnichsen, Lise; Nybroe, Ole; Jensen, Lars Stoumann;     Show all 8 Authors
Source:
Soil biology & biochemistry 2018 v.122 pp. 91-103
ISSN:
0038-0717
Subject:
animal manures; bacterial communities; community structure; crop yield; eutrophication; fertilizer application; genes; mineral fertilizers; nutrient management; organic fertilizers; pH; ribosomal RNA; soil bacteria; soil properties; Denmark
Abstract:
... Applications of mineral and organic fertilisers are an important agricultural practice for improving crop yields, but these applications can also affect soil properties, as well as the microbial community structure and function. The objective of this study was to compare the legacy effects of long-term applications of mineral fertiliser versus animal slurry on the composition and activity of soil ...
DOI:
10.1016/j.soilbio.2018.04.003

12. Localized application of sewage sludge improved plant nitrogen and phosphorus uptake by rhizobox‐grown spring wheat

Author:
Magid, Jakob,   et al.   ; Wang, Yaosheng; Jensen, Lars Stoumann;     Show all 3 Authors
Source:
Zeitschrift für Pflanzenernährung und Bodenkunde 2016 v.179 no.6 pp. 689-695
ISSN:
1436-8730
Subject:
Triticum aestivum; ammonium; nitrogen; nitrogen fertilizers; nutrient uptake; pH; phosphorus; plowing; root growth; roots; sewage sludge; shoots; soil; spring wheat
Abstract:
... Sewage sludge (SS) can be used as an alternative fertilizer in agriculture. It is normally broadcasted and plowed into soil, but it is not clear if it has a potential as a placement fertilizer. A rhizobox experiment was conducted to investigate the placement effect of SS and mineral nitrogen (N) fertilizer on shoot and root growth as well as nutrient uptake of spring wheat (Triticum aestivum L.). ...
DOI:
10.1002/jpln.201600153

13. Thermal drying of the solid fraction from biogas digestate: Effects of acidification, temperature and ventilation on nitrogen content

Author:
Magid, Jakob,   et al.   ; Pantelopoulos, Athanasios; Jensen, Lars Stoumann;     Show all 3 Authors
Source:
Waste management 2016 v.48 pp. 218-226
ISSN:
0956-053X
Subject:
acidification; air; ammonia; ammonium; biogas; drying; nitrogen content; pH; sulfuric acid; temperature; volatilization; waste management
Abstract:
... Drying of solids produced from digestate is prone to N losses through NH3 volatilisation. The applicability of acidification as an NH3 emission mitigation technique during the drying of solids from digestate was assessed in a drying experiment. Operating conditions comprised four drying temperatures (70–160°C), two air ventilation rates (natural, 420ml/min) and three pH levels (9.2, 6.5 and 5.5) o ...
DOI:
10.1016/j.wasman.2015.10.008

14. Phosphorus availability on many organically managed farms in Europe

Author:
Magid, Jakob,   et al.   ; Cooper, Julia; Reed, EleanorY.; Hörtenhuber, Stefan; Lindenthal, Thomas; Løes, Anne-Kristin; Mäder, Paul; Oberson, Astrid; Kolbe, Hartmut; Möller, Kurt;     Show all 10 Authors
Source:
Nutrient cycling in agroecosystems 2018 v.110 no.2 pp. 227-239
ISSN:
1385-1314
Subject:
databases; grasslands; horticulture; organic production; phosphorus; poultry; soil; soil test values; Germany; Norway; Sweden; Switzerland
Abstract:
... Maintaining sufficient soil phosphorus (P) levels for non-limiting crop growth is challenging in organic systems since off-farm inputs of P are restricted. This study assessed the status of P on organic farms in Europe using soil test results for extractable P. Data was obtained from published literature, unpublished theses, and various national and regional databases of soil test values. Most of ...
DOI:
10.1007/s10705-017-9894-2

15. Effects of thermal drying on phosphorus availability from iron‐precipitated sewage sludge

Author:
Magid, Jakob,   et al.   ; Lemming, Camilla; Scheutz, Charlotte; Bruun, Sander; Jensen, Lars Stoumann;     Show all 5 Authors
Source:
Zeitschrift für Pflanzenernährung und Bodenkunde 2017 v.180 no.6 pp. 720-728
ISSN:
1436-8730
Subject:
Hordeum vulgare; drying; drying temperature; fertilizers; phosphorus; sanitation; sewage sludge; soil; soil treatment; spring barley; triple superphosphate; wastewater treatment
Abstract:
... Thermal drying of sewage sludge implies sanitation and improves practical handling options of the sludge prior to land application. However, it may also affect its value as a fertilizer. The objective of this study was to assess whether thermal drying of sewage sludge, as well as drying temperature, affects plant P availability after application to soil. The experiment included dewatered sewage sl ...
DOI:
10.1002/jpln.201700070

16. Layered Double Hydroxides: Potential Release-on-Demand Fertilizers for Plant Zinc Nutrition

Author:
Magid, Jakob,   et al.   ; López-Rayo, Sandra; Imran, Ahmad; Bruun Hansen, Hans Chr.; Schjoerring, Jan K.;     Show all 5 Authors
Source:
Journal of agricultural and food chemistry 2017 v.65 no.40 pp. 8779-8789
ISSN:
1520-5118
Subject:
Hordeum vulgare; barley; calcareous soils; chemical composition; equations; hydroxides; nutrition; pH; quartz; sand; zinc; zinc fertilizers
Abstract:
... A novel zinc (Zn) fertilizer concept based on Zn-doped layered double hydroxides (Zn-doped Mg-Fe-LDHs) has been investigated. Zn-doped Mg-Fe-LDHs were synthesized, their chemical composition was analyzed, and their nutrient release was studied in buffered solutions with different pH values. Uptake of Zn by barley (Hordeum vulgare cv. Antonia) was evaluated in short- (8 weeks), medium- (11 weeks), ...
DOI:
10.1021/acs.jafc.7b02604

17. Repeated application of organic waste affects soil organic matter composition: Evidence from thermal analysis, FTIR-PAS, amino sugars and lignin biomarkers

Author:
Magid, Jakob,   et al.   ; Peltre, Clément; Gregorich, Edward G.; Bruun, Sander; Jensen, Lars S.;     Show all 5 Authors
Source:
Soil biology & biochemistry 2017 v.104 pp. 117-127
ISSN:
0038-0717
Subject:
thermal stability; phenols; amides; carbon; carbon sequestration; field experimentation; NPK fertilizers; biomarkers; fertilizer application; amino sugars; soil fertility; oxidation; ecosystems; thermal analysis; land application; microbial communities; composts; soil organic matter; vibration; soil; microbial activity; lignin; proteins; photoacoustic spectroscopy; sewage sludge; cattle manure; fungi; Denmark
Abstract:
... Land application of organic waste is an important alternative to landfilling and incineration because it helps restore soil fertility and has environmental and agronomic benefits. These benefits may be related to the biochemical composition of the waste, which can result in the accumulation of different types of carbon compounds in soil. The objective of this study was to identify and characterise ...
DOI:
10.1016/j.soilbio.2016.10.016

18. Survival of chicken ascarid eggs exposed to different soil types and fungi

Author:
Magid, Jakob,   et al.   ; Thapa, Sundar; Mejer, Helena; Thamsborg, Stig M.; Lekfeldt, Jonas D.S.; Wang, Rui; Jensen, Birgit; Meyling, Nicolai V.;     Show all 8 Authors
Source:
Applied soil ecology 2017 v.121 pp. 143-151
ISSN:
0929-1393
Subject:
Acremonium; Ascaridia galli; Heterakis; Metarhizium brunneum; Pochonia chlamydosporia; agar; biological control; biotic factors; chickens; eggs; fungi; parasites; pastures; soil biota; soil sterilization; soil types
Abstract:
... The eggs of intestinal ascarid parasites (Ascaridia galli and Heterakis spp.) of chickens can survive long-term in soil and this makes contaminated yards and pastures infective to chickens for years. The fungi Pochonia chlamydosporia Biotype 10 and Metarhizium brunneum KVL04-57 can kill ascarid eggs in agar assays but their efficacy against these eggs in soil is unknown. We therefore initially tes ...
DOI:
10.1016/j.apsoil.2017.10.001

19. Cultivar differences in spatial root distribution during early growth in soil, and its relation to nutrient uptake - a study of wheat, onion and lettuce

Author:
Magid, Jakob,   et al.   ; Andresen, Marianne; Dresbøll, Dorte Bodin; Jensen, Lars Stoumann; Thorup-Kristensen, Kristian;     Show all 5 Authors
Source:
Plant and soil 2016 v.408 no.1-2 pp. 255-270
ISSN:
0032-079X
Subject:
cultivars; genetic variation; lettuce; nutrient content; nutrient uptake; onions; organic production; production technology; root growth; root systems; soil; spatial variation; spring wheat
Abstract:
... BACKGROUND AND AIMS: A study was made to quantify early root development, soil exploitation and nutrient uptake in spring wheat, onion and lettuce, and their variation among cultivars. The goal was to study genetic variation in root traits making cultivars better adapted to organic production systems or other low-input systems. METHODS: Six cultivars of each species were grown in transparent tubes ...
DOI:
10.1007/s11104-016-2932-z

20. Long-term amendment of urban and animal wastes equivalent to more than 100 years of application had minimal effect on plant uptake of potentially toxic elements

Author:
Magid, Jakob,   et al.   ; López-Rayo, Sandra; Laursen, Kristian H.; Lekfeldt, Jonas D.S.; Delle Grazie, Fabio;     Show all 5 Authors
Source:
Agriculture, ecosystems & environment 2016 v.231 pp. 44-53
ISSN:
0167-8809
Subject:
European Union; agricultural land; agricultural soils; animal wastes; animals; cadmium; composts; copper; field experimentation; grain yield; heavy metals; molybdenum; nutrients; oats; peas; risk; sewage sludge; sewage treatment; soil biota; toxic substances; urban areas; zinc; England; Germany
Abstract:
... Urban waste products such as sewage sludge and organic household waste compost have a potential as fertilizers in agriculture, but evidence from historical field experiments performed in England and Germany with sewage sludge as fertilizer pointed towards negative effects of sludge-derived heavy metal accumulation on soil microbiota and plants. However, sewage sludge has improved in quality during ...
DOI:
10.1016/j.agee.2016.06.019

21. Opportunity costs for maize associated with localised application of sewage sludge derived fertilisers, as indicated by early root and phosphorus uptake responses

Author:
Magid, Jakob,   et al.   ; Lemming, Camilla; Oberson, Astrid; Hund, Andreas; Jensen, Lars Stoumann;     Show all 5 Authors
Source:
Plant and soil 2016 v.406 no.1-2 pp. 201-217
ISSN:
0032-079X
Subject:
corn; dry matter accumulation; nutrient uptake; opportunity costs; phosphorus; phosphorus fertilizers; recycling; root growth; roots; sewage sludge; shoots; sludge ash; soil; triple superphosphate
Abstract:
... BACKGROUND: Phosphorus recycling from waste and localised placement of fertilisers can potentially improve sustainable P management in agriculture. However, knowledge about root and plant P uptake responses to placement of complex waste-derived fertilisers is lacking. METHODS: Sewage sludge (SS) and sewage sludge ash (ASH) were tested against triple superphosphate (TSP) in a rhizobox setup where m ...
DOI:
10.1007/s11104-016-2865-6

22. Increasing thermal drying temperature of biosolids reduced nitrogen mineralisation and soil N2O emissions

Author:
Magid, Jakob,   et al.   ; Case, Sean D. C.; Gómez-Muñoz, Beatriz; Jensen, Lars Stoumann;     Show all 4 Authors
Source:
Environmental science and pollution research international 2016 v.23 no.14 pp. 14383-14392
ISSN:
0944-1344
Subject:
ammonia; carbon; carbon dioxide; crops; dried biosolids; dry matter content; drying; drying temperature; field capacity; greenhouse gas emissions; mineralization; nitrogen; nitrous oxide; nutrient availability; volatilization; wastewater treatment
Abstract:
... Previous studies found that thermally dried biosolids contained more mineralisable organic nitrogen (N) than the raw or anaerobically digested (AD) biosolids they were derived from. However, the effect of thermal drying temperature on biosolid N availability is not well understood. This will be of importance for the value of the biosolids when used to fertilise crops. We sourced AD biosolids from ...
DOI:
10.1007/s11356-016-6607-3

23. Pig slurry acidification, separation technology and thermal conversion affect phosphorus availability in soil amended with the derived solid fractions, chars or ashes

Author:
Magid, Jakob,   et al.   ; Christel, Wibke; Bruun, Sander; Kwapinski, Witold; Jensen, Lars Stoumann;     Show all 5 Authors
Source:
Plant and soil 2016 v.401 no.1-2 pp. 93-107
ISSN:
0032-079X
Subject:
acidification; drainage; heat treatment; phosphorus; pig manure; slurries; soil; soil amendments; triple superphosphate
Abstract:
... AIMS: The aim was to study effects of slurry acidification, separation technology and thermal processing on the availability of P in soil amended with the solid fraction of pig slurry. METHODS: Acidified and non-acidified slurry were separated using different technologies: screw press (SCR), decanting centrifuge (DEC) and drainage after chemical pretreatment (CHE). Solids and pyrolysed (400 °C or ...
DOI:
10.1007/s11104-015-2519-0

24. Measuring Phosphorus Availability in Recently Fertilized Soils with the Diffusive Gradient in Thin Films (DGT) Method – Challenges and Opportunities

Author:
Magid, Jakob,   et al.   ; Christel, Wibke; Lemming, Camilla; Mundus, Simon; Bruun, Sander; Jensen, Lars Stoumann;     Show all 6 Authors
Source:
Communications in soil science and plant analysis 2016 v.47 no.5 pp. 563-570
ISSN:
1532-2416
Subject:
binding capacity; fertilizers; films (materials); gels; hydrocolloids; nutrient availability; phosphorus; prediction; soil; soil amendments; solubility
Abstract:
... The diffusive gradients in thin films (DGT) technique is acknowledged as an adequate method for predicting soil phosphorus (P) availability. However, the relatively low binding capacity of the DGT gel can be problematic when soils have recently been amended with fertilizers of high P solubility. We studied the performance of commercially available DGT devices with P concentrations from below to se ...
DOI:
10.1080/00103624.2016.1141920

25. Intensification of Upland Agriculture in Thailand: Development or Degradation?

Author:
Magid, Jakob,   et al.   ; Bruun, Thilde Bech; de Neergaard, Andreas; Burup, Maria Libach; Hepp, Catherine Maria; Larsen, Marianne Nylandsted; Abel, Christin; Aumtong, Supathida; Mertz, Ole;     Show all 9 Authors
Source:
Land degradation & development 2017 v.28 no.1 pp. 83-94
ISSN:
1085-3278
Subject:
carbon; corn; farmers' attitudes; highlands; interviews; land use change; markets; politics; questionnaires; remote sensing; shifting cultivation; soil quality; topsoil; Thailand
Abstract:
... The large scale conversion of extensive swidden agriculture to intensive market oriented production of maize in upland areas of South East Asia is a cause of environmental concern. This study investigates how intensive maize cultivation affects soil quality in an upland area of Northern Thailand by comparing commonly used indicators of soil quality in soils from maize fields used at various intens ...
DOI:
10.1002/ldr.2596

26. The implications of phasing out conventional nutrient supply in organic agriculture: Denmark as a case

Author:
Magid, Jakob,   et al.   ; Oelofse, Myles; Jensen, Lars Stoumann;     Show all 3 Authors
Source:
Organic agriculture 2013 v.3 no.1 pp. 41-55
ISSN:
1879-4238
Subject:
animal manures; crop rotation; farms; livestock; management systems; nutrient availability; nutrients; organic production; soil; soil management; straw; Denmark
Abstract:
... Soil fertility management in organic systems, regulated by the organic standards, should seek to build healthy, fertile soils and reduce reliance on external inputs. The use of nutrients from conventional sources, such as animal manures from conventional farms, is currently permitted, with restrictions, in the organic regulations. However, the reliance of organic agriculture on the conventional sy ...
DOI:
10.1007/s13165-013-0045-z

27. Addressing food waste reduction in Denmark

Author:
Magid, Jakob,   et al.   ; Halloran, Afton; Clement, Jesper; Kornum, Niels; Bucatariu, Camelia;     Show all 5 Authors
Source:
Food policy 2014 v.49 pp. 294-301
ISSN:
0306-9192
Subject:
biogas; biogeochemical cycles; composts; energy recovery; food labeling; food packaging; food production; food waste; industry; public-private partnerships; society; stakeholders; urbanization; waste reduction; Denmark
Abstract:
... Global food demand is driven by population and economic growth, and urbanization. One important instrument to meet this increasing demand and to decrease the pressure on food production is to minimize food losses and food waste. Food waste and loss is a major societal, economic, nutritional and environmental challenge. Using the case of Denmark, this paper analyses causes of food waste, and discus ...
DOI:
10.1016/j.foodpol.2014.09.005

28. Effects of forest expansion on mountain grassland: changes within soil organic carbon fractions

Author:
Magid, Jakob,   et al.   ; Guidi, Claudia; Rodeghiero, Mirco; Gianelle, Damiano; Vesterdal, Lars;     Show all 5 Authors
Source:
Plant and soil 2014 v.385 no.1-2 pp. 373-387
ISSN:
0032-079X
Subject:
land use change; grasslands; fractionation; forest succession; soil organic carbon; mineral soils; mixed forests; environmental management; Picea abies; soil sampling; aggregate stability; Fagus sylvatica; Alps region
Abstract:
... BACKGROUND AND AIMS: Grassland abandonment followed by forest succession is the dominant land-use change in the European Alps. We studied the impact of current forest expansion on mountain grassland on changes in physical soil organic carbon (SOC) fractions along a land-use and management gradient, focusing on changes in aggregate stability and particulate organic matter (POM). METHODS: Four succe ...
DOI:
10.1007/s11104-014-2315-2

29. Phosphorus availability from the solid fraction of pig slurry is altered by composting or thermal treatment

Author:
Magid, Jakob,   et al.   ; Christel, Wibke; Bruun, Sander; Jensen, Lars Stoumann;     Show all 4 Authors
Source:
Bioresource technology 2014 v.169 pp. 543-551
ISSN:
0960-8524
Subject:
combustion; composting; drying; heat treatment; phosphorus; phosphorus fertilizers; pig manure; pyrolysis; temperate soils; temporal variation
Abstract:
... The alteration of easily available phosphorus (P) from the separated solid fraction of pig slurry by composting and thermal processing (pyrolysis or combustion at 300–1000°C) was investigated by water and acidic extractions and the diffusive gradients in thin films (DGT) technique. Temporal changes in P availability were monitored by repeated DGT application in three amended temperate soils over 1 ...
DOI:
10.1016/j.biortech.2014.07.030

30. Spatiotemporal dynamics of phosphorus release, oxygen consumption and greenhouse gas emissions after localised soil amendment with organic fertilisers

Author:
Magid, Jakob,   et al.   ; Christel, Wibke; Zhu, Kun; Hoefer, Christoph; Kreuzeder, Andreas; Santner, Jakob; Bruun, Sander; Jensen, Lars Stoumann;     Show all 8 Authors
Source:
The Science of the total environment 2016 v.554-555 pp. 119-129
ISSN:
0048-9697
Subject:
carbon dioxide; fertilizer rates; gels; greenhouse gas emissions; greenhouse gases; nutrient availability; organic fertilizers; organic matter; oxygen; oxygen consumption; phosphorus; phosphorus fertilizers; pig manure; recycling; roots; soil; soil amendments; soil nutrients; temporal variation
Abstract:
... Organic fertilisation inevitably leads to heterogeneous distribution of organic matter and nutrients in soil, i.e. due to uneven surface spreading or inhomogeneous incorporation. The resulting localised hotspots of nutrient application will induce various biotic and abiotic nutrient turnover processes and fixation in the residuesphere, giving rise to distinct differences in nutrient availability, ...
DOI:
10.1016/j.scitotenv.2016.02.152

31. The impact of black wattle encroachment of indigenous grasslands on soil carbon, Eastern Cape, South Africa

Author:
Magid, Jakob,   et al.   ; Oelofse, Myles; Birch-Thomsen, Torben; de Neergaard, Andreas; van Deventer, Ross; Bruun, Sander; Hill, Trevor;     Show all 7 Authors
Source:
Biological invasions 2016 v.18 no.2 pp. 445-456
ISSN:
1387-3547
Subject:
Acacia mearnsii; carbon; carbon sinks; chronosequences; ecological invasion; ecosystems; environmental impact; fuelwood; grassland soils; grasslands; introduced species; invasive species; trees; South Africa
Abstract:
... Black wattle (Acacia mearnsii, De Wild.) is a fast growing tree species introduced into South Africa in the nineteenth century for commercial purposes. While being an important source of timber and firewood for local communities, black wattle is an aggressive invasive species and has pervasive adverse environmental impacts in South Africa. Little is known about the effects of black wattle encroach ...
DOI:
10.1007/s10530-015-1017-x

32. Repeated soil application of organic waste amendments reduces draught force and fuel consumption for soil tillage

Author:
Magid, Jakob,   et al.   ; Peltre, Clément; Nyord, Tavs; Bruun, Sander; Jensen, Lars S.;     Show all 5 Authors
Source:
Agriculture, ecosystems & environment 2015 v.211 pp. 94-101
ISSN:
0167-8809
Subject:
bulk density; cattle manure; clay fraction; cohesion; composts; conventional tillage; energy; energy use and consumption; field experimentation; porosity; recycling; sewage sludge; soil density; soil organic carbon; soil texture; soil treatment; spring; tractors; variance; Denmark
Abstract:
... Soil application of organic waste products (OWP) can maintain or increase soil organic carbon (SOC) content, which in turn could lead to increased porosity and potentially to reduced energy use for soil tillage. Only a few studies have addressed the effect of SOC content on draught force for soil tillage, and this still needs to be addressed for fields that receive diverse types of organic waste o ...
DOI:
10.1016/j.agee.2015.06.004

33. Rapid estimation of sugar release from winter wheat straw during bioethanol production using FTIR-photoacoustic spectroscopy

Author:
Magid, Jakob,   et al.   ; Bekiaris, Georgios; Lindedam, Jane; Peltre, Clément; Decker, Stephen R.; Turner, Geoffrey B.; Bruun, Sander;     Show all 7 Authors
Source:
Biotechnology for biofuels 2015 v.8 no.1 pp. 85
ISSN:
1754-6834
Subject:
cellulose; chemometrics; crystal structure; environmental factors; enzymatic hydrolysis; ethanol production; glucose; hemicellulose; hydrolysis; least squares; lignin; models; photoacoustic spectroscopy; prediction; screening; wheat straw; winter wheat; xylose; Denmark; United Kingdom
Abstract:
... BACKGROUND: Complexity and high cost are the main limitations for high-throughput screening methods for the estimation of the sugar release from plant materials during bioethanol production. In addition, it is important that we improve our understanding of the mechanisms by which different chemical components are affecting the degradability of plant material. In this study, Fourier transform infra ...
DOI:
10.1186/s13068-015-0267-2
PubMed:
26110018
PubMed Central:
PMC4479319

34. Carbohydrates and thermal properties indicate a decrease in stable aggregate carbon following forest colonization of mountain grassland

Author:
Magid, Jakob,   et al.   ; Guidi, Claudia; Cannella, David; Leifeld, Jens; Rodeghiero, Mirco; Gianelle, Damiano; Vesterdal, Lars;     Show all 7 Authors
Source:
Soil biology & biochemistry 2015 v.86 pp. 135-145
ISSN:
0038-0717
Subject:
Fagus sylvatica; Picea abies; aggregate stability; carbohydrates; carbon; chemical analysis; forests; grasslands; land use change; mineral soils; soil aggregation; thermal analysis; thermal properties; Alps region; Italy
Abstract:
... In mountainous areas of Europe, the abandonment of grasslands followed by forest expansion is the dominant land-use change. Labile (i.e. easily decomposable) litter represents the major source for soil microbial products, which promote soil aggregation and long-term C stabilization. Our objective was to investigate changes in the content and origin of soil C components involved into aggregate stab ...
DOI:
10.1016/j.soilbio.2015.03.027

35. Does intake of trace elements through urban gardening in Copenhagen pose a risk to human health?

Author:
Magid, Jakob,   et al.   ; Warming, Marlies; Hansen, Mette G.; Holm, Peter E.; Hansen, Thomas H.; Trapp, Stefan;     Show all 6 Authors
Source:
Environmental pollution 2015 v.202 pp. 17-23
ISSN:
0269-7491
Subject:
arsenic; cadmium; chromium; copper; crops; gardening; gardens; geophagia; human health; lead; nickel; risk; soil; vegetable consumption; zinc
Abstract:
... This study investigates the potential health risk from urban gardening. The concentrations of the trace elements arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb), nickel (Ni), and zinc (Zn) in five common garden crops from three garden sites in Copenhagen were measured. Concentrations (mg/kg dw) of As were 0.002–0.21, Cd 0.03–0.25, Cr < 0.09–0.38, Cu 1.8–8.7, Ni < 0.23–0.62, Pb 0. ...
DOI:
10.1016/j.envpol.2015.03.011

36. Improved sampling methods document decline in soil organic carbon stocks and concentrations of permanganate oxidizable carbon after transition from swidden to oil palm cultivation

Author:
Magid, Jakob,   et al.   ; Bruun, Thilde Bech; Egay, Kelvin; Mertz, Ole;     Show all 4 Authors
Source:
Agriculture, ecosystems & environment 2013 v.178 pp. 127-134
ISSN:
0167-8809
Subject:
land use change; soil ecology; palm oils; plantations; sampling; soil organic carbon; Ultisols; soil quality; bulk density; carbon sinks; topsoil; soil sampling; sinks (equipment); Malaysia; Borneo
Abstract:
... Oil palm plantations are spreading rapidly throughout Southeast Asia and in some countries, they are promoted as carbon sinks compared to the swidden cultivation systems that they often replace. However, little is known about the impacts of this land use change on soil organic carbon (SOC) stocks or soil quality. This study uses resampling of archived soil samples to investigate the sensitivity of ...
DOI:
10.1016/j.agee.2013.06.018

37. Formation and remobilisation of soil microbial residue. Effect of clay content and repeated additions of cellulose and sucrose

Author:
Magid, Jakob,   et al.   ; Aumtong, Supathida; de Neergaard, Andreas;     Show all 3 Authors
Source:
Biology and fertility of soils 2011 v.47 no.8 pp. 863-874
ISSN:
0178-2762
Subject:
soil solution; soil organic matter; sucrose; microbial biomass; cellulose; mechanistic models; clay; soil
Abstract:
... In two studies, we assessed the mass balance of added 14C-labelled sucrose and 15NH 4 15 NO3 by measuring 14CO2, 14C and 15N in soil microbial biomass (SMB) and 14C and 15N in soil solution. Specifically, we assessed the potential of recently added 14C to be re-mobilised by cryptic growth using subsequent additions of sucrose and cellulose and the effect of physical protection on the stabilisation ...
DOI:
10.1007/s00374-011-0592-y

38. Concentration of mineral elements in wheat (Triticum aestivum L.) straw: Genotypic differences and consequences for enzymatic saccharification

Author:
Magid, Jakob,   et al.   ; Murozuka, Emiko; de Bang, Thomas C.; Frydenvang, Jens; Lindedam, Jane; Laursen, Kristian H.; Bruun, Sander; Schjoerring, Jan K.;     Show all 8 Authors
Source:
Biomass and bioenergy 2015 v.75 pp. 134-141
ISSN:
0961-9534
Subject:
Geographical Locations; Triticum aestivum; bioenergy; biomass production; calcium; carbon; energy; genotype; lignocellulose; magnesium; mineral content; nitrogen; potassium; saccharification; silicon; straw; sugars; sulfur; winter wheat
Abstract:
... Crop residues are utilized as lignocellulosic biomass for production of energy via biochemical or thermochemical degradation. The conversion efficiency depends on the content of major organic components, but also other elements play a role and are thus considered to be important biomass quality parameters. In the present study, 20 winter wheat (Triticum aestivum L.) genotypes were grown at two dif ...
DOI:
10.1016/j.biombioe.2015.02.017

39. Evaluation of the leucine incorporation technique for detection of pollution-induced community tolerance to copper in a long-term agricultural field trial with urban waste fertilizers

Author:
Magid, Jakob,   et al.   ; Lekfeldt, Jonas Duus Stevens; Holm, Peter E.; Nybroe, Ole; Brandt, Kristian Koefoed;     Show all 5 Authors
Source:
Environmental pollution 2014 v.194 pp. 78-85
ISSN:
0269-7491
Subject:
agricultural soils; bacterial communities; bioavailability; biosensors; copper; correlation; fertilizers; field experimentation; leucine; organic wastes; sewage sludge; soil amendments; toxic substances
Abstract:
... Copper (Cu) is known to accumulate in agricultural soils receiving urban waste products as fertilizers. We here report the use of the leucine incorporation technique to determine pollution-induced community tolerance (Leu-PICT) to Cu in a long-term agricultural field trial. A significantly increased bacterial community tolerance to Cu was observed for soils amended with organic waste fertilizers a ...
DOI:
10.1016/j.envpol.2014.07.013

40. Long‐term manure exposure increases soil bacterial community potential for plasmid uptake

Author:
Magid, Jakob,   et al.   ; Musovic, Sanin; Klümper, Uli; Dechesne, Arnaud; Smets, Barth F.;     Show all 5 Authors
Source:
Environmental microbiology reports 2014 v.6 no.2 pp. 125-130
ISSN:
1758-2229
Subject:
gamma-Proteobacteria; host range; microbial communities; plasmids; soil; soil bacteria
Abstract:
... Microbial communities derived from soils subject to different agronomic treatments were challenged with three broad host range plasmids, RP4, pIPO2tet and pRO101, via solid surface filter matings to assess their permissiveness. Approximately 1 in 10 000 soil bacterial cells could receive and maintain the plasmids. The community permissiveness increased up to 100% in communities derived from manure ...
DOI:
10.1111/1758-2229.12138
PubMed:
24596284

41. Biological 12C–13C fractionation increases with increasing community-complexity in soil microcosms

Author:
Magid, Jakob,   et al.   ; Yang, Weijun; Christensen, Søren; Rønn, Regin; Ambus, Per; Ekelund, Flemming;     Show all 6 Authors
Source:
Soil biology & biochemistry 2014 v.69 pp. 197-201
ISSN:
0038-0717
Subject:
carbon; carbon dioxide; ecosystems; food chain; glucose; isotope fractionation; isotopes; predation; soil biota; soil ecology
Abstract:
... Isotope fractionation is a ubiquitous phenomenon in natural ecosystems. When chemical elements move through food chains, natural isotope ratios change because biological processes tend to discriminate against heavier isotopes. This effect can be used to trace flows of matter, estimate process-rates and determine the trophic level of organisms in biological systems. While it is widely accepted that ...
DOI:
10.1016/j.soilbio.2013.10.030

42. Assessment of Existing Roadside Swales with Engineered Filter Soil: II. Treatment Efficiency and in situ Mobilization in Soil Columns

Author:
Magid, Jakob,   et al.   ; Ingvertsen, Simon T.; Cederkvist, Karin; Jensen, Marina B.;     Show all 4 Authors
Source:
Journal of environmental quality 2012 v.41 no.6 pp. 1970-1981
ISSN:
0047-2425
Subject:
chromium; copper; dissolved organic carbon; fluorescence; heavy metals; irrigation rates; leaching; lead; preferential flow; rain intensity; runoff; soil; watersheds; zinc; Germany
Abstract:
... Use of roadside infiltration systems using engineered filter soil for optimized treatment has been common practice in Germany for decades, but little documentation is available regarding their long-term treatment performance. Here we present the results of laboratory leaching experiments with intact soil columns (15 cm i.d., 25–30 cm length) collected from two German roadside infiltration swales c ...
DOI:
10.2134/jeq2012.0116

43. Nitrogen fertilization affects silicon concentration, cell wall composition and biofuel potential of wheat straw

Author:
Magid, Jakob,   et al.   ; Murozuka, Emiko; Laursen, Kristian H.; Lindedam, Jane; Shield, Ian F.; Bruun, Sander; Møller, Inge S.; Schjoerring, Jan K.;     Show all 8 Authors
Source:
Biomass and bioenergy 2014 v.64 pp. 291-298
ISSN:
0961-9534
Subject:
biofuels; biomass production; calcium; cell wall components; cellulose; correlation; crop quality; feedstocks; fertilizer rates; hemicellulose; lignin; lignocellulose; nitrogen; nitrogen content; plant growth; potassium; saccharification; silicon; wheat straw; winter wheat
Abstract:
... Nitrogen is an essential input factor required for plant growth and biomass production. However, very limited information is available on how nitrogen fertilization affects the quality of crop residues to be used as lignocellulosic feedstock. In the present study, straw of winter wheat plants grown at six different levels of nitrogen supply ranging from 48 to 288 kg nitrogen ha−1 was analyzed for ...
DOI:
10.1016/j.biombioe.2014.03.034

44. Effects of fertilization with urban and agricultural organic wastes in a field trial – Waste imprint on soil microbial activity

Author:
Magid, Jakob,   et al.   ; Poulsen, Pernille Hasse Busk; Luxhøi, Jesper; de Neergaard, Andreas;     Show all 4 Authors
Source:
Soil biology & biochemistry 2013 v.57 pp. 794-802
ISSN:
0038-0717
Subject:
NPK fertilizers; bacteria; carbon; carbon dioxide; cattle manure; ecological function; field experimentation; guidelines; heavy metals; humans; microbial activity; microbial biomass; microbial communities; mineral fertilizers; organic fertilizers; sewage sludge; soil; soil ecology; soil organic matter; soil respiration; urine
Abstract:
... In the past decades a significant change in composition of urban organic waste products has occurred in many first world countries, due to cleaner technologies as well as outsourcing of heavy industries. However, the societal perception of organic urban waste has become increasingly negative, leading to widespread advocacy of incineration. Therefore we established the ‘CRUCIAL’ long-term field tri ...
DOI:
10.1016/j.soilbio.2012.02.031

45. A Minimum Data Set of Water Quality Parameters to Assess and Compare Treatment Efficiency of Stormwater Facilities

Author:
Magid, Jakob,   et al.   ; Ingvertsen, Simon Toft; Jensen, Marina Bergen;     Show all 3 Authors
Source:
Journal of environmental quality 2011 v.40 no.5 pp. 1488-1502
ISSN:
0047-2425
Subject:
water quality; monitoring; copper; nitrogen; phenanthrenes; phenols; hydrograph; data collection; pesticides; stormwater; zinc; chromium; phosphorus; aquatic ecosystems; pathogens
Abstract:
... Urban stormwater runoff is often of poor quality, impacting aquatic ecosystems and limiting the use of stormwater runoff for recreational purposes. Several stormwater treatment facilities (STFs) are in operation or at the pilot testing stage, but their efficiencies are neither well documented nor easily compared due to the complex contaminant profile of stormwater and the highly variable runoff hy ...
DOI:
10.2134/jeq2010.0420

46. Interactions between Soil Texture and Placement of Dairy Slurry Application: I. Flow Characteristics and Leaching of Nonreactive Components

Author:
Magid, Jakob,   et al.   ; Glæsner, Nadia; Kjaergaard, Charlotte; Rubæk, Gitte H.;     Show all 4 Authors
Source:
Journal of environmental quality 2011 v.40 no.2 pp. 337-343
ISSN:
1537-2537
Subject:
agricultural soils; aquatic environment; clay fraction; dairy cattle; dairy manure; land application; leaching; loam soils; manure spreading; preferential flow; sand; sandy loam soils; slurries; soil amendments; soil pore system; soil texture
Abstract:
... Land application of manure can exacerbate nutrient and contaminant transfers to the aquatic environment. This study examined the effect of injecting a dairy cattle (Bos taurus L.) manure slurry on mobilization and leaching of dissolved, nonreactive slurry components across a range of agricultural soils. We compared leaching of slurry-applied bromide through intact soil columns (20 cm diam., 20 cm ...
DOI:
10.2134/jeq2010.0317

47. Interactions between Soil Texture and Placement of Dairy Slurry Application: II. Leaching of Phosphorus Forms

Author:
Magid, Jakob,   et al.   ; Glæsner, Nadia; Kjaergaard, Charlotte; Rubæk, Gitte H.;     Show all 4 Authors
Source:
Journal of environmental quality 2011 v.40 no.2 pp. 344-351
ISSN:
1537-2537
Subject:
adsorption; dairy cattle; dairy manure; eutrophication; fine-textured soils; land application; leaching; manure spreading; phosphorus; sand; sandy loam soils; sandy soils; slurries; soil texture
Abstract:
... Managing phosphorus (P) losses in soil leachate following land application of manure is key to curbing eutrophication in many regions. We compared P leaching from columns of variably textured, intact soils (20 cm diam., 20 cm high) subjected to surface application or injection of dairy cattle (Bos taurus L.) manure slurry. Surface application of slurry increased P leaching losses relative to basel ...
DOI:
10.2134/jeq2010.0318

48. Carbon, Nitrogen, and Phosphorus Distribution in Particle Size–Fractionated Separated Pig and Cattle Slurry

Author:
Magid, Jakob,   et al.   ; Peters, Karin; Hjorth, Maibritt; Jensen, Lars Stoumann;     Show all 4 Authors
Source:
Journal of environmental quality 2011 v.40 no.1 pp. 224-232
ISSN:
1537-2537
Subject:
carbon; cattle; cattle manure; centrifugation; drainage; filtration; flocculation; fractionation; gravity; livestock production; nitrogen; nutrient excess; particle size; phosphorus; pig manure; pollution load; polymers; slurries; swine
Abstract:
... Solid liquid separation of animal slurry is a method to reduce the excess nutrient loads from intensive livestock production. Five different separation technologies (sedimentation, centrifugation, pressurized filtration, polymer flocculation and drainage, and iron chloride addition + polymer flocculation and drainage) were applied to pig and cattle slurry in a laboratory study. Separation efficien ...
DOI:
10.2134/jeq2010.0217

49. Determination of a relationship between chitinase activity and microbial diversity in chitin amended compost

Author:
Magid, Jakob,   et al.   ; Poulsen, Pernille H.B.; Møller, Jacob;     Show all 3 Authors
Source:
Bioresource technology 2008 v.99 no.10 pp. 4355-4359
ISSN:
0960-8524
Subject:
DNA; chitin; chitinase; composts; denaturing gradient gel electrophoresis; enzyme activity; gardens; genetic relationships; genetic variation; households; microbial activity; organic wastes; parks
Abstract:
... By using denaturing gradient gel electrophoresis (DGGE) and simultaneously measuring the enzymatic activity of chitinase, we could link genetic diversity of the indigenous microbial communities with chitinase activity in compost samples. A garden/park waste compost and a source separated organic household waste compost, showed different genetic diversity as measured by PCR-DGGE of total DNA extrac ...
DOI:
10.1016/j.biortech.2007.08.042
PubMed:
17920263

50. Soil erosion from shifting cultivation and other smallholder land use in Sarawak, Malaysia

Author:
Magid, Jakob,   et al.   ; de Neergaard, Andreas; Mertz, Ole;     Show all 3 Authors
Source:
Agriculture, ecosystems & environment 2008 v.125 no.1-4 pp. 182-190
ISSN:
0167-8809
Subject:
rice; radionuclides; soil chemical properties; small-scale farming; Oryza sativa; tropical forests; soil organic matter; shifting cultivation; cesium; leaching; carbon sinks; topsoil; soil erosion; soil texture; land use; Piper nigrum; Malaysia
Abstract:
... The sustainability of shifting cultivation systems and their impact on soil quality continues to be debated, and although a growing body of literature shows a limited impact on, e.g. soil carbon stocks, shifting cultivation still has a reputation as detrimental to the environment. We wished to compare soil erosion from three land use types in a shifting cultivation system, namely upland rice, pepp ...
DOI:
10.1016/j.agee.2007.12.013

51. Phosphorus Distribution in Untreated and Composted Solid Fractions from Slurry Separation

Author:
Magid, Jakob,   et al.   ; Jorgensen, Karin; Luxhoi, Jesper; Jensen, Lars Stoumann;     Show all 4 Authors
Source:
Journal of environmental quality 2010 v.39 no.1 pp. 393-401
ISSN:
1537-2537
Subject:
slurries; phosphorus; solubility; composting; composts; fractionation; flocculation; anaerobic digestion; centrifugation; organic matter; mineral content; nutrient content; temporal variation; bioavailability; manure handling; manure storage; animal manures
Abstract:
... The distribution of phosphorus (P) (water-soluble inorganic P [Pᵢ], acid-soluble Pᵢ, and residual P) was determined in 40 samples of solids from solid–liquid separated slurry. These were collected from separation plants using different technologies, separating by simple mechanical means, by flocculation as pre-treatment before mechanical separation or by anaerobic digestion followed by separation ...
DOI:
10.2134/jeq2009.0168
PubMed:
20048327

52. Assessment of Existing Roadside Swales with Engineered Filter Soil: I. Characterization and Lifetime Expectancy

Author:
Magid, Jakob,   et al.   ; Ingvertsen, Simon T.; Cederkvist, Karin; Régent, Yoann; Sommer, Harald; Jensen, Marina B.;     Show all 6 Authors
Source:
Journal of environmental quality 2012 v.41 no.6 pp. 1960-1969
ISSN:
0047-2425
Subject:
cadmium; chromium; copper; guidelines; heavy metals; infiltration rate; lead; organic matter; phosphorus; pollutants; roads; soil color; soil pH; soil quality; soil texture; stormwater; zinc; Germany
Abstract:
... Roadside infiltration swales with well-defined soil mixtures (filter soil) for the enhancement of both infiltration and treatment of stormwater runoff from roads and parking areas have been common practice in Germany for approximately two decades. Although the systems have proven hydraulically effective, their treatment efficiency and thus lifetime expectancies are not sufficiently documented. The ...
DOI:
10.2134/jeq2011.0318

53. Characterization of Leached Phosphorus from Soil, Manure, and Manure-Amended Soil by Physical and Chemical Fractionation and Diffusive Gradients in Thin Films (DGT)

Author:
Magid, Jakob,   et al.   ; Glæsner, Nadia; Donner, Erica; Rubæk, Gitte H.; Zhang, Hao; Lombi, Enzo;     Show all 6 Authors
Source:
Environmental Science & Technology 2012 v.46 no.19 pp. 10564-10571
ISSN:
1520-5851
Subject:
bioavailability; cattle manure; centrifugation; fractionation; irrigation rates; leachates; leaching; manure spreading; molybdates; particulates; phosphorus; physical properties; soil
Abstract:
... We are challenged to date to fully understand mechanisms controlling phosphorus (P) mobilization in soil. In this study we evaluated physical properties, chemical reactivity, and potential bioavailability of P mobilized in soil during a leaching event and examined how the amounts and properties of leached P were influenced by surface application of cattle manure. Leaching experiments on manure its ...
DOI:
10.1021/es301861a

54. Investigating the Diversity of Pseudomonas spp. in Soil Using Culture Dependent and Independent Techniques

Author:
Magid, Jakob,   et al.   ; Li, Lili; Abu Al-Soud, Waleed; Bergmark, Lasse; Riber, Leise; Hansen, Lars H.; Sørensen, Søren J.;     Show all 7 Authors
Source:
Current microbiology 2013 v.67 no.4 pp. 423-430
ISSN:
0343-8651
Subject:
Pseudomonas; bacteria; cattle manure; culture media; fertilizers; genes; naphthaleneacetic acid; ribosomal RNA; sequence analysis; sewage sludge; soil
Abstract:
... Less than 1 % of bacterial populations present in environmental samples are culturable, meaning that cultivation will lead to an underestimation of total cell counts and total diversity. However, it is less clear whether this is also true for specific well-defined groups of bacteria for which selective culture media is available. In this study, we use culture dependent and independent techniques t ...
DOI:
10.1007/s00284-013-0382-x
PubMed:
23677146

55. Effects of fertilization with urban and agricultural organic wastes in a field trial – Prokaryotic diversity investigated by pyrosequencing

Author:
Magid, Jakob,   et al.   ; Poulsen, Pernille H.B.; Al-Soud, Waleed Abu; Bergmark, Lasse; Hansen, Lars H.; Sørensen, Søren J.;     Show all 6 Authors
Source:
Soil biology & biochemistry 2013 v.57 pp. 784-793
ISSN:
0038-0717
Subject:
Acidobacteria; Actinobacteria; Crenarchaeota; Cyanobacteria; bacteria; beta-Proteobacteria; community structure; fertilizers; field experimentation; genes; humans; nitrogen; nutrients; organic wastes; quantitative polymerase chain reaction; ribosomal RNA; sequence analysis; sewage sludge; soil; soil microorganisms; soil quality; toxicity; urine; Denmark
Abstract:
... The impact of different fertilizer treatments on prokaryotic diversity in a Danish urban waste field trial was investigated using tag-encoded amplicon pyrosequencing. The field trial was established in 2003 to investigate the application of urban organic waste as fertilizer in agriculture and to identify the effects on soil quality. The fertilizers (e.g. composted organic household waste, sewage s ...
DOI:
10.1016/j.soilbio.2011.12.023

56. Exploring the immediate and long‐term impact on bacterial communities in soil amended with animal and urban organic waste fertilizers using pyrosequencing and screening for horizontal transfer of antibiotic resistance

Author:
Magid, Jakob,   et al.   ; Riber, Leise; Poulsen, Pernille H.B.; Al‐Soud, Waleed A.; Skov Hansen, Lea B.; Bergmark, Lasse; Brejnrod, Asker; Norman, Anders; Hansen, Lars H.; Sørensen, Søren J.;     Show all 10 Authors
Source:
FEMS microbiology ecology 2014 v.90 no.1 pp. 206-224
ISSN:
0168-6496
Subject:
Actinobacteria; MSW composts; Pseudomonas; animals; antibiotic resistance; bacterial communities; cattle manure; community structure; fertilizer application; field experimentation; genes; horizontal gene transfer; long term effects; ribosomal RNA; screening; seasonal variation; sequence analysis; sewage sludge; soil amendments; soil bacteria; soil ecology; spring
Abstract:
... We investigated immediate and long‐term effects on bacterial populations of soil amended with cattle manure, sewage sludge or municipal solid waste compost in an ongoing agricultural field trial. Soils were sampled in weeks 0, 3, 9 and 29 after fertilizer application. Pseudomonas isolates were enumerated, and the impact on soil bacterial community structure was investigated using 16S rRNA amplicon ...
DOI:
10.1111/1574-6941.12403

57. Relating soil carbon fractions to land use in sloping uplands in northern Thailand

Author:
Magid, Jakob,   et al.   ; Aumtong, Supathida; Bruun, Sander; de Neergaard, Andreas;     Show all 4 Authors
Source:
Agriculture, ecosystems & environment 2009 v.131 no.3-4 pp. 229-239
ISSN:
0167-8809
Subject:
orchards; clay fraction; soil organic carbon; no-tillage; cation exchange capacity; soil quality; secondary forests; highlands; topsoil; carbon nitrogen ratio; land use; Thailand
Abstract:
... In this study from Khun Samun Watershed in northern Thailand we investigate land use and soil carbon relationships in 99 sloping upland soils that pertain to soil degradation/conservation and carbon storage/loss. Approximately 35% of the variability in total soil carbon could be explained by the available quantitative and semi-quantitative information, primarily clay content and CEC, and to a less ...
DOI:
10.1016/j.agee.2009.01.013

58. Tissue architecture and soil fertility controls on decomposer communities and decomposition of roots

Author:
Magid, Jakob,   et al.   ; Lindedam, Jane; Poulsen, Pernille; Luxhøi, Jesper;     Show all 4 Authors
Source:
Soil biology & biochemistry 2009 v.41 no.6 pp. 1040-1049
ISSN:
0038-0717
Subject:
plant tissues; soil bacteria; soil nutrients; nitrogen; composts; Festuca rubra; gel electrophoresis; cellulose; microbial colonization; Trifolium pratense; scanning electron microscopy; carbon nitrogen ratio; soil fertility; biodegradation; species diversity; provenance; lignin; roots; Denmark
Abstract:
... Using complementary techniques we observed great differences in decomposition of mono- and dicot roots (Festuca rubra L., red fescue grass and Trifolium pratense L., red clover) in compost and soil of varying fertility which we attribute both to chemical characteristics and differences in tissue architecture. In our study the lignin contents were equal for the root materials while C-to-N ratios an ...
DOI:
10.1016/j.soilbio.2009.01.023

59. Contrasting effects of nitrogen limitation and amino acid imbalance on carbon and nitrogen turnover in three species of Collembola

Author:
Magid, Jakob,   et al.   ; Larsen, Thomas; Ventura, Marc; O'Brien, Diane M.; Lomstein, Bente Aa.; Larsen, John;     Show all 6 Authors
Source:
Soil biology & biochemistry 2011 v.43 no.4 pp. 749-759
ISSN:
0038-0717
Subject:
Folsomia candida; Fusarium culmorum; animal growth; diet; animals; nitrogen; isotopes; Saccharomyces cerevisiae; edaphic factors; amino acids; carbon; amino nitrogen; phosphorus; endogenous sources; population dynamics; bacteria
Abstract:
... Soil animal detritivores play an important role in facilitating decomposition processes but little information is available on how the quality of dietary resources affects their stoichiometry of carbon (C) nitrogen (N) and phosphorus (P), and turnover of C and N. This study investigated how a fungal diet, Fusarium culmorum, with a low N content and imbalanced amino acid (AA) composition affected t ...
DOI:
10.1016/j.soilbio.2010.12.008

60. Genetic variation in degradability of wheat straw and potential for improvement through plant breeding

Author:
Magid, Jakob,   et al.   ; Jensen, Jacob Wagner; Hansen-Møller, Jens; Andersen, Sven Bode; Bruun, Sander;     Show all 5 Authors
Source:
Biomass and bioenergy 2011 v.35 no.3 pp. 1114-1120
ISSN:
0961-9534
Subject:
bioenergy; cultivars; ethanol production; feeds; genes; genetic variation; grain yield; heritability; plant breeding; selection response; soil; wheat straw; winter wheat
Abstract:
... The degradability of cereal straw is of importance when it is used for animal feed, biological means of bioenergy production such as bioethanol production and when it is incorporated in soil. We examined wheat straw from 106 different winter wheat cultivars representing the northwest European contemporary gene pool. The cultivars were grown at two different locations to assess the potential for br ...
DOI:
10.1016/j.biombioe.2010.11.036

61. Prediction of the degradability and ash content of wheat straw from different cultivars using near infrared spectroscopy

Author:
Magid, Jakob,   et al.   ; Bruun, Sander; Jensen, Jacob Wagner; Lindedam, Jane; Engelsen, Søren Balling;     Show all 5 Authors
Source:
Industrial crops and products 2010 v.31 no.2 pp. 321-326
ISSN:
0926-6690
Subject:
mathematical models; fermentation; cultivars; feeds; calibration; equations; geographical variation; wheat straw; near-infrared spectroscopy; model validation; ethanol production; ash content; air drying; commodity prices; biodegradability; pyrolysis; accuracy; prediction
Abstract:
... Degradability of straw is important in connection with the fermentation process for bioethanol production, while the ash content is important for its suitability for incineration. Therefore, a fast method for assessment of straw quality could be very useful in determining the price and in helping choose between different applications for specific straw batches, such as fermentation for ethanol pro ...
DOI:
10.1016/j.indcrop.2009.11.011

62. Temporal and spatial trends in soil organic carbon stocks following maize cultivation in semi-arid Tanzania, East Africa

Author:
Magid, Jakob,   et al.   ; Birch-Thomsen, Torben; Elberling, Bo; Fog, Bjarne;     Show all 4 Authors
Source:
Nutrient cycling in agroecosystems 2007 v.79 no.3 pp. 291-302
ISSN:
1385-1314
Subject:
Zea mays; corn; temporal variation; spatial variation; soil organic carbon; semiarid zones; agroecosystems; soil fertility; carbon sequestration; soil quality; land use change; remote sensing; savannas; chronosequences; animal manures; soil texture; soil water content; Tanzania
Abstract:
... Conversion of native ecosystems to agro-ecosystems influences the amount, quality and turnover of soil organic carbon (SOC). As most agro-ecosystems are not in a steady state in terms of the content of SOC, the time scale and feedback mechanisms of changes in SOC are highly relevant for predicting future soil fertility and potential rates of soil carbon losses or sequestration. This paper focuses ...
DOI:
10.1007/s10705-007-9116-4

63. Properties of anaerobically digested and composted municipal solid waste assessed by linking soil mesofauna dynamics and nitrogen modelling

Author:
Magid, Jakob,   et al.   ; Larsen, Thomas; Luxhøi, Jesper; Jensen, Lars Stoumann; Krogh, Paul Henning;     Show all 5 Authors
Source:
Biology and fertility of soils 2007 v.44 no.1 pp. 59-68
ISSN:
0178-2762
Subject:
bacteria; barley; ergosterol; excretion; microbial biomass; mineralization; models; municipal solid waste; nitrogen; plant growth; sandy loam soils; soil fauna; soil respiration; urea; urea nitrogen
Abstract:
... We have studied the effect of anaerobically digested (ADMSW) and composted municipal solid waste (CMSW) on mineralization and foodweb dynamics to verify the hypothesis that ADMSW would immobilize N right after addition to soil in contrast to addition with CMSW. Another hypothesis was that the mesofauna (enchytraeids and microarthropods) would stimulate N release from the decomposer community. We m ...
DOI:
10.1007/s00374-007-0178-x

64. Assimilation dynamics of soil carbon and nitrogen by wheat roots and Collembola

Author:
Magid, Jakob,   et al.   ; Larsen, Thomas; Gorissen, Antonie; Krogh, Paul Henning; Ventura, Marc;     Show all 5 Authors
Source:
Plant and soil 2007 v.295 no.1-2 pp. 253-264
ISSN:
0032-079X
Subject:
Collembola; Triticum aestivum; amino acids; amino sugars; carbon; fungi; green manures; isotope labeling; nitrogen; organic matter; plant growth; roots; shoots; soil; soil ecology; stable isotopes; statistical models; wheat
Abstract:
... It has been demonstrated that plant roots can take up small amounts of low-molecular weight (LMW) compounds from the surrounding soil. Root uptake of LMW compounds have been investigated by applying isotopically labelled sugars or amino acids but not labelled organic matter. We tested whether wheat roots took up LMW compounds released from dual-labelled (¹³C and ¹⁵N) green manure by analysing for ...
DOI:
10.1007/s11104-007-9280-y

65. Soil Solution Sampled with and without Tension in Arable and Heathland Soils

Author:
Magid, Jakob,   et al.   ; Christensen, Niels;     Show all 2 Author
Source:
Soil Science Society of America journal 1993 v.57 no.6 pp. 1463-1469
ISSN:
0361-5995
Subject:
arable soils; heathland soils; soil analysis; soil solution; chemical composition; sampling; samplers; long term experiments; solutes; Denmark
Abstract:
... The composition of soil solution is of importance in many aspects of soil science. It is therefore of interest to reach an understanding of when to apply a certain sampling method in preference to others. For this reason we evaluated both zero-tension and tension samplers for use in long-term monitoring of soil solutions sampled fortnightly in a sandy arable soil plot from 1987 to 1990 and in a sa ...
DOI:
10.2136/sssaj1993.03615995005700060011x

66. A fresh look at shifting cultivation: Fallow length an uncertain indicator of productivity

Author:
Magid, Jakob,   et al.   ; Mertz, Ole; Wadley, Reed L.; Nielsen, Uffe; Bruun, Thilde B.; Colfer, Carol J.P.; de Neergaard, Andreas; Jepsen, Martin R.; Martinussen, Torben; Zhao, Qiang; Noweg, Gabriel T.;     Show all 11 Authors
Source:
Agricultural systems 2008 v.96 no.1-3 pp. 75-84
ISSN:
0308-521X
Subject:
rice; shifting cultivation; fallow; land use; Borneo
Abstract:
... Shifting cultivation is practiced by millions of farmers in the tropics and has been accused of causing deforestation and keeping farmers in poverty. The assumed positive relationship between fallow length and crop yields has long shaped such negative opinions on the sustainability and environmental impact of the system, as population growth is believed inevitably to lead to its collapse. Empirica ...
DOI:
10.1016/j.agsy.2007.06.002

67. pH-Dependent Release of Cadmium, Copper, and Lead from Natural and Sludge-Amended Soils

Author:
Magid, Jakob,   et al.   ; Sukreeyapongse, Orathai; Holm, Peter E.; Strobel, Bjarne W.; Panichsakpatana, Supamard; Hansen, Hans Christian Bruun;     Show all 6 Authors
Source:
Journal of environmental quality 2002 v.31 no.6 pp. 1901-1909
ISSN:
1537-2537
Subject:
Hapludalfs; Kandiustults; cadmium; copper; desorption; heavy metals; leaching; lead; pH; protons; soil properties
Abstract:
... The pH-dependent release of cadmium, copper, and lead from soil materials was studied by use of a stirred flow cell to quantify their release and release rates, and to evaluate the method as a test for the bonding strength and potential mobility of heavy metals in soils. Soil materials from sludge-amended and nonamended A horizons from a Thai coarse-textured Kandiustult and a Danish loamy Hapludal ...
DOI:
10.2134/jeq2002.1901
PubMed:
12469840

68. Phosphate Leaching Responses from Unperturbed, Anaerobic, or Cattle Manured Mesotrophic Sandy Loam Soils

Author:
Magid, Jakob,   et al.   ; Jensen, Marina Bergen; Mueller, Torsten; Hansen, Hans Christian Bruun;     Show all 4 Authors
Source:
Journal of environmental quality 1999 v.28 no.6 pp. 1796-1803
ISSN:
0047-2425
Subject:
cattle; cattle manure; desorption; feces; iron; leaching; macropores; mixing; pastures; phosphates; sandy loam soils; sewage; topsoil; water quality; watersheds
Abstract:
... Control of P from sewage outlets has not led to expected improvement of Danish freshwater quality, calling the diffuse P losses especially from drained agricultural land into question. We studied some mechanisms for P loss from the fertilized topsoil from selected catchments that have been monitored for P losses: (i) losses due to desorption of P from A horizons enriched throughout the last decade ...
DOI:
10.2134/jeq1999.00472425002800060015x

69. Phosphate and Tritium Transport through Undisturbed Subsoil as Affected by Ionic Strength

Author:
Magid, Jakob,   et al.   ; Jensen, Marina Bergen; Hansen, Hans Christian Bruun; Hansen, Søren; Jørgensen, Peter Rene; Nielsen, Niels Erik;     Show all 6 Authors
Source:
Journal of environmental quality 1998 v.27 no.1 pp. 139-145
ISSN:
0047-2425
Subject:
ionic strength; orthophosphates; preferential flow; rain intensity; slicing; soil; steady flow; storms; tritium; water content
Abstract:
... Storm flow can cause serious subsurface losses of dissolved orthophosphate from soils that under low flow conditions effectively retain orthophosphate (Pᵢ). To test if storm flow loss of Pᵢ can be related to preferential flow and/or decrease in ionic strength of mobile solution we applied combined pulses of H₂³²PO⁻₄ (³²p) and tritium (³H₂O) to an undisturbed column of clayey subsoil (diam. 0.5 m, ...
DOI:
10.2134/jeq1998.00472425002700010020x