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1. Animal bonechar increases sorption and decreases leaching potential of aminocyclopyrachlor and mesotrione in a tropical soil

Author:
Mendes, Kassio Ferreira; Hall, Kathleen E.; Takeshita, Vanessa; Rossi, Mônica Lanzoni; Tornisielo, Valdemar Luiz
Source:
Geoderma 2018 v.316 pp. 11-18
ISSN:
0016-7061
Subject:
aminocyclopyrachlor; application rate; biochar; cows; desorption; leaching; mesotrione; particle size; tropical soils
Abstract:
... While previous studies have shown the influence of various biochars on the fate and transport of herbicides in soil, little information exists on the effects of bonechar. The aim of this research was to evaluate the effect of cow bonechar amendments on the sorption-desorption and leaching of aminocyclopyrachlor and mesotrione in a tropical soil. Soil was amended with bonechar at rates of 0 (contro ...
DOI:
10.1016/j.geoderma.2017.12.017

2. Changes in soil phenol oxidase activities due to long-term application of compost and mineral N in a walnut orchard

Author:
Mazzon, Martina; Cavani, Luciano; Margon, Alja; Sorrenti, Giovambattista; Ciavatta, Claudio; Marzadori, Claudio
Source:
Geoderma 2018 v.316 pp. 70-77
ISSN:
0016-7061
Subject:
biogeochemical cycles; catechol oxidase; composts; ecosystems; enzyme activity; fertilizer rates; laccase; microbial biomass; microorganisms; monophenol monooxygenase; nitrogen; orchards; phenol; planting; soil biota; soil depth; soil sampling; urea; walnuts
Abstract:
... Phenol oxidases (POs) are a group of soil extracellular oxidoreductase enzymes, which are involved in oxidative processes related to nutrient cycling. This class of enzymes has multiple functions at both the organism and ecosystem level and can trigger either positive or negative feedback loops between soil organisms and soil organic matter.The purpose of this study was to evaluate: (i) whether PO ...
DOI:
10.1016/j.geoderma.2017.12.009

3. Coupled effect of temperature and mineral additions facilitates decay of aspen bark

Author:
Kurganova, Irina; Lopes de Gerenyu, Valentin; Galibina, Natalia; Kapitsa, Ekaterina; Shorohova, Ekaterina
Source:
Geoderma 2018 v.316 pp. 27-37
ISSN:
0016-7061
Subject:
Phaeozems; Populus tremula; aerosols; atmospheric deposition; bark; boreal forests; carbon; carbon cycle; cellulose; coarse woody debris; gases; lignin; minerals; models; nitrogen; phosphorus; temperature; thermostats; variance
Abstract:
... Tree bark represents a substantial component of coarse woody debris (CWD) in boreal forests. Estimating its decay rates improves our understanding of decomposition processes of woody debris and their effects on the forest carbon cycle. The atmospheric deposition of nitrogen (N) and phosphorus (P) from aerosols and gases has notably grown during the last century. We examined the effect of mineral N ...
DOI:
10.1016/j.geoderma.2017.12.014

4. Linking soil organic matter thermal stability with contents of clay, bound water, organic carbon and nitrogen

Author:
Kučerík, Jiří; Tokarski, David; Demyan, Michael Scott; Merbach, Ines; Siewert, Christian
Source:
Geoderma 2018 v.316 pp. 38-46
ISSN:
0016-7061
Subject:
bioactive properties; clay; clay fraction; equations; fractionation; heat; land use; microbial activity; minerals; nitrogen; nitrogen content; provenance; relative humidity; soil analysis; soil organic carbon; soil stabilization; temperature; thermal stability; thermogravimetry
Abstract:
... Thermogravimetry is a technique measuring mass change during programmed heating. In soil analysis, it is used for determination of content of volatile fractions, thermally labile and stable fractions of soil organic matter and minerals. One method of data analysis uses the determination of mass losses in 10°C temperature areas. In the past, their mutual correlation revealed several larger temperat ...
DOI:
10.1016/j.geoderma.2017.12.001

5. Long-term warming rather than grazing significantly changed total and active soil procaryotic community structures

Author:
Che, Rongxiao; Deng, Yongcui; Wang, Weijin; Rui, Yichao; Zhang, Jing; Tahmasbian, Iman; Tang, Li; Wang, Shiping; Wang, Yanfen; Xu, Zhihong; Cui, Xiaoyong
Source:
Geoderma 2018 v.316 pp. 1-10
ISSN:
0016-7061
Subject:
DNA replication; Kobresia; alpine meadows; cell respiration; community structure; ecosystems; eutrophication; field experimentation; gene expression; global warming; grazing; humans; prediction; prokaryotic cells; protein degradation; quantitative polymerase chain reaction; ribosomal DNA; ribosomal RNA; signal transduction; soil; soil bacteria; species diversity; transcription (genetics); China
Abstract:
... There is a paucity of knowledge in understanding the effects of warming and grazing on soil microbes and their active counterparts, especially on the Tibetan Plateau which is extremely sensitive to global warming and human activities. A six-year field experiment was conducted to investigate the effects of asymmetric warming and moderate grazing on total and active soil microbes in a Tibetan Kobres ...
DOI:
10.1016/j.geoderma.2017.12.005

6. Mapping the probability of ripened subsoils using Bayesian logistic regression with informative priors

Author:
Steinbuch, Luc; Brus, Dick J.; Heuvelink, Gerard B.M.
Source:
Geoderma 2018 v.316 pp. 56-69
ISSN:
0016-7061
Subject:
Bernoulli distribution; Markov chain; Monte Carlo method; air; clay soils; data collection; models; multipliers; prediction; regression analysis; uncertainty; water table; Netherlands
Abstract:
... One of the first soil forming processes in marine and fluviatile clay soils is ripening, the irreversible change of physical and chemical soil properties, especially consistency, under influence of air. We used Bayesian binomial logistic regression (BBLR) to update the map showing unripened subsoils for a reclamation area in the west of The Netherlands. Similar to conventional binomial logistic re ...
DOI:
10.1016/j.geoderma.2017.12.010

7. Methods for sandy land detection based on multispectral remote sensing data

Author:
Wu, Junjun; Gao, Zhihai; Liu, Qinhuo; Li, Zengyuan; Zhong, Bo
Source:
Geoderma 2018 v.316 pp. 89-99
ISSN:
0016-7061
Subject:
clay; humans; least squares; models; multispectral imagery; prediction; remote sensing; silt; silt fraction; spatial data; vegetation cover; China
Abstract:
... Sandification is becoming a serious threat to the sustainability of human habitation. The potential of remote sensing in sandy land detection has been previously demonstrated, but transitional sandy land is difficult to detect because of vegetation cover. The aim of this study, therefore, was to propose methods for sandy land detection based on mixed pixel decomposition and soil particle compositi ...
DOI:
10.1016/j.geoderma.2017.12.015

8. Moisture absorption by plant residue in soil

Author:
Kutlu, Turgut; Guber, Andrey K.; Rivers, Mark L.; Kravchenko, Alexandra N.
Source:
Geoderma 2018 v.316 pp. 47-55
ISSN:
0016-7061
Subject:
absorption; carbon; corn; leaves; micro-computed tomography; oils; particle size distribution; plant residues; porosity; soil water; soil water retention; soybeans; water content; water distribution; water holding capacity
Abstract:
... Oil incorporated plant residues are an important source of carbon inputs and its decomposition defines magnitudes of many soil processes. While soil properties, especially soil moisture levels, influence decomposition rates, the moisture level of plant residue itself can differ from that of the surrounding soil due to the so called “sponge effect”-water absorption by plant residue from the surroun ...
DOI:
10.1016/j.geoderma.2017.11.043

9. Novel application of Compound Specific Stable Isotope (CSSI) techniques to investigate on-site sediment origins across arable fields

Author:
Mabit, Lionel; Gibbs, Max; Mbaye, Modou; Meusburger, Katrin; Toloza, Arsenio; Resch, Christian; Klik, Andreas; Swales, Andrew; Alewell, Christine
Source:
Geoderma 2018 v.316 pp. 19-26
ISSN:
0016-7061
Subject:
Bayesian theory; agricultural land; agroecosystems; basins; carbon; cesium; corn; cost effectiveness; crops; decision making; fatty acids; growing season; land use; managers; provenance; radionuclides; sediment deposition; sediment transport; sediments; stable isotopes; statistical models; Austria
Abstract:
... In recent years, Compound Specific Stable Isotope (CSSI) techniques have enabled promising new tracers to track land-use-specific sediment sources. However, empirical data exploring the technique, particularly under controlled conditions, is still scarce. Hence, the main goal of this study is to explore the suitability of CSSI to identify sediment sources under different land use in the small agri ...
DOI:
10.1016/j.geoderma.2017.12.008

10. Palygorskite occurrences and genesis in calcisol and groundwater carbonates of the Tensift Al Haouz area, Central Morocco

Author:
Elidrissi, Soukaina; Daoudi, Lahcen; Fagel, Nathalie
Source:
Geoderma 2018 v.316 pp. 78-88
ISSN:
0016-7061
Subject:
Calcisols; X-ray diffraction; calcite; carbonates; chemical analysis; clay; clay fraction; crystals; dry environmental conditions; evaporation; groundwater; pH; palygorskite; scanning electron microscopy; semiarid zones; smectite; soil water; Morocco
Abstract:
... Palygorskite has been identified as a major constituent of the clay fraction in carbonate soils of arid and semi-arid regions. This fibrous clay has a great significance as a paleoclimatic indicator and is of fundamental importance for a more complete understanding of conditions under which petrocalcic horizons and groundwater carbonates precipitate. The present study was undertaken in order to ev ...
DOI:
10.1016/j.geoderma.2017.12.013

11. Phosphorus stocks and speciation in soil profiles of a long-term fertilizer experiment: Evidence from sequential fractionation, P K-edge XANES, and 31P NMR spectroscopy

Author:
Koch, Maximilian; Kruse, Jens; Eichler-Löbermann, Bettina; Zimmer, Dana; Willbold, Sabine; Leinweber, Peter; Siebers, Nina
Source:
Geoderma 2018 v.316 pp. 115-126
ISSN:
0016-7061
Subject:
fractionation; inorganic phosphorus; nuclear magnetic resonance spectroscopy; plant nutrition; calcium; fertilizer application; X-ray absorption spectroscopy; iron; orthophosphates; phosphorus fertilizers; Cambisols; topsoil; aluminum; esters; soil profiles; agricultural productivity
Abstract:
... Agricultural productivity depends on the use of phosphorus (P) of which not only the topsoil, but also the subsoil, can hold immense stocks. To assess their importance for plant nutrition, we compared the P status of Stagnic Cambisol profiles in experimental plots that received different P fertilizer applications for 16years. Sequential fractionation was combined with P K-edge X-ray absorption nea ...
DOI:
10.1016/j.geoderma.2017.12.003

12. Spatial prediction of soil water retention in a Páramo landscape: Methodological insight into machine learning using random forest

Author:
Guio Blanco, Carlos M.; Brito Gomez, Victor M.; Crespo, Patricio; Ließ, Mareike
Source:
Geoderma 2018 v.316 pp. 100-114
ISSN:
0016-7061
Subject:
Landsat; algorithms; altitude; anthropogenic activities; cartography; data analysis; data collection; digital elevation models; ecosystems; hydrologic models; land use; landscapes; mineral soils; model validation; national parks; organic soils; prediction; remote sensing; rivers; soil water; soil water retention; spatial variation; uncertainty; vegetation index; watersheds; Andes region; Ecuador
Abstract:
... Soils of Páramo ecosystems regulate the water supply to many Andean populations. In spite of being a necessary input to distributed hydrological models, regionalized soil water retention data from these areas are currently not available. The investigated catchment of the Quinuas River has a size of about 90km² and comprises parts of the Cajas National Park in southern Ecuador. It is dominated by s ...
DOI:
10.1016/j.geoderma.2017.12.002