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- Author:
- Leytem, April B., et al. ; Dari, Biswanath; Rogers, Christopher W.; Schroeder, Kurtis L.; Show all 4 Authors
- Source:
- Soil Science Society of America journal 2019 v.83 no.3 pp. 817-824
- ISSN:
- 0361-5995
- Subject:
- acid soils; agricultural land; calcareous soils; calcium carbonate; crop yield; fertilizers; inorganic carbon; phosphorus; soil quality; soil sampling; Idaho
- Abstract:
- ... Soil P testing is critical to ensure the accuracy of fertilizer recommendations and to optimize crop yield while minimizing negative environmental consequences. Olsen-P is the most commonly used soil P test for alkaline calcareous soils found in Idaho and the western United States. The Bray-1 test is commonly used in the Pacific Northwest on neutral to acidic soils but underestimates P in alkaline ...
- Handle:
- 10113/6471211
- DOI:
- 10.2136/sssaj2018.08.0314
- https://dx.doi.org/10.2136/sssaj2018.08.0314
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; McKinney, Chad W.; Show all 3 Authors
- Source:
- The Science of the total environment 2018 v.635 pp. 1477-1483
- ISSN:
- 0048-9697
- Subject:
- agricultural soils; antibiotic resistance genes; copper; copper sulfate; crops; quantitative polymerase chain reaction; ribosomal RNA; soil sampling; wastewater; wastewater irrigation; wastewater treatment; wheat
- Abstract:
- ... The application of dairy wastewater to agricultural soils is a widely used practice to irrigate crops and recycle nutrients. In this study, small-scale field plots were irrigated monthly (6 times) with dairy wastewater (100%), wastewater diluted to 50% with irrigation (canal) water, and diluted wastewater spiked with copper sulfate (50 mg Cu L⁻¹), while control plots were irrigated with canal wate ...
- DOI:
- 10.1016/j.scitotenv.2018.04.020
- https://dx.doi.org/10.1016/j.scitotenv.2018.04.020
3. Spatial and temporal variation in physicochemical properties of dairy lagoons in south-central Idaho
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Bjorneberg, David L.; Show all 3 Authors
- Source:
- Transactions of the ASABE 2017 v.60 no.2 pp. 439-447
- ISSN:
- 2151-0032
- Subject:
- air quality; ammonia; ammonium nitrogen; autumn; chemical oxygen demand; climate change; dairies; dissolved oxygen; electrical conductivity; forage quality; free stalls; greenhouse gas emissions; greenhouse gases; leaching; models; nutrients; pH; phosphorus; potassium; seasonal variation; spring; surveys; temperature; total solids; waste lagoons; wastewater; Idaho
- Abstract:
- ... Large quantities of wastewater are generated on dairies in south-central Idaho, which can be a source of valuable nutrients as well as contribute to air quality and climate change issues via ammonia (NH3) and greenhouse gas (GHG) emissions. The objective of this study was to examine the range of lagoon water properties among dairies in the region and to determine how they varied spatially and temp ...
- Handle:
- 10113/5801867
- DOI:
- 10.13031/trans.11991
- http://dx.doi.org/10.13031/trans.11991
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- Aerosol science and technology 2016 v.50 no.1 pp. 71-75
- ISSN:
- 0278-6826
- Subject:
- Escherichia coli O157; ambient temperature; betaine; bioaerosols; evaporation; microorganisms; osmotolerance; peptones; probability; samplers; viability; viscosity
- Abstract:
- ... Collection fluids used in liquid-based bioaerosol samplers can influence the viability of microorganisms. In this study we determined the recovery efficiency of vegetative E. coli O157:H7 cells that were spiked into low viscosity evaporating collection fluids during operation of a BioSampler™ for up to 90 min at room temperature. The collection fluids tested were distilled (DI) water, phosphate-bu ...
- Handle:
- 10113/62021
- DOI:
- 10.1080/02786826.2015.1126666
- http://dx.doi.org/10.1080/02786826.2015.1126666
- Author:
- Leytem, April B., et al. ; Khalil, Tariq M.; Stöckle, Claudio O.; Carlson, Bryan R.; Uslar-Valle, Nicole; Nelson, Roger L.; Frear, Craig S.; Ma, Jingwei; Higgins, Stewart S.; Dungan, Robert S.; Show all 10 Authors
- Source:
- Computers and electronics in agriculture 2019
- ISSN:
- 0168-1699
- Subject:
- ammonia; anaerobic digestion; animal manure management; carbon; concentrated animal feeding operations; cropping systems; dairy industry; dairy manure; decision making; decision support systems; environmental protection; equations; greenhouse gas emissions; greenhouse gases; irrigation; land application; model validation; models; nitrogen; nitrous oxide production; nutrient management; nutrients; nutritive value; phosphorus; risk
- Abstract:
- ... Dairy concentrated animal feeding operations (CAFO) are required to implement nutrient management plans enforced by environmental protection agencies to minimizing the risk of water resource degradation and to report gaseous emissions when they exceed certain threshold values. Although tools exist to aid in completing such tasks, few of the tools integrate the impact of on-farm manure treatment un ...
- DOI:
- 10.1016/j.compag.2019.05.039
- https://dx.doi.org/10.1016/j.compag.2019.05.039
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- Journal of environmental quality 2015 v.44 no.5 pp. 1550-1555
- ISSN:
- 0047-2425
- Subject:
- DNA; Marichromatium; Thiocapsa roseopersicina; Thiolamprovum pedioforme; carotenoids; chemical oxygen demand; dairies; denaturing gradient gel electrophoresis; genes; growth factors; livestock; manure storage; microbial detection; nitrogen; odors; ponds; ribosomal RNA; salinity; sampling; solids; sulfur; wastewater
- Abstract:
- ... The presence of purple bacteria in manure storage lagoons is often associated with reduced odors. In this study, our objectives were to determine the occurrence of purple sulfur bacteria (PSB) in seven dairy wastewater lagoons and to identify possible linkages between wastewater properties and purple blooms. Community DNA was extracted from composited wastewater samples, and a conservative 16S rRN ...
- Handle:
- 10113/61488
- DOI:
- 10.2134/jeq2015.03.0128
- https://dx.doi.org/10.2134/jeq2015.03.0128
- Author:
- Leytem, April B., et al. ; Niu, Mutian; Appuhamy, Jayasooriya A.D.R.N.; Dungan, Robert S.; Kebreab, Ermias; Show all 5 Authors
- Source:
- Agriculture, ecosystems & environment 2017 v.250 pp. 51-58
- ISSN:
- 0167-8809
- Subject:
- carbon; crude protein; dairy cattle; diet; environmental impact; excretion; forage; manure storage; methane; milk production; nitrogen; nitrogen content; nutrient use efficiency; physicochemical properties; slurries; soil
- Abstract:
- ... Altering dairy cattle diets to reduce both enteric methane (CH4) production and nitrogen (N) excretion are valuable tools for mitigating the environmental impact of dairy production. We examined the impact of altering diets on changes in physicochemical properties of manure during storage and short term plant N availability. Manure collected from cattle fed diets with differing forage and crude pr ...
- Handle:
- 10113/5823469
- DOI:
- 10.1016/j.agee.2017.08.034
- CHORUS:
- 10.1016/j.agee.2017.08.034
- https://dx.doi.org/10.1016/j.agee.2017.08.034
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Tarkalson, David D.; Ippolito, James A.; Bjorneberg, David L.; Show all 5 Authors
- Source:
- Soil Science Society of America journal 2017 v.81 no.3 pp. 537-545
- ISSN:
- 0361-5995
- Subject:
- Hordeum vulgare; Medicago sativa; Zea mays; agricultural soils; alfalfa; autumn; barley; carbon dioxide; composted manure; conventional tillage; corn; crop rotation; crop yield; dairy manure; forage; forage crops; greenhouse gas emissions; greenhouse gases; irrigated farming; methane production; nitrification inhibitors; nitrogen; nitrogen content; nitrous oxide; oxidation; semiarid soils; silage; spring; sprinkler irrigation; urea; urea fertilizers; urease; Western United States
- Abstract:
- ... Information is needed regarding the effect of N source on greenhouse gas (GHG) emissions from irrigated semiarid agricultural soils. We report N₂O, CO₂, and CH₄ emissions from a silage corn (Zea mays L.) (2013)–barley (Hordeum vulgare L.) (2014)–alfalfa (Medicago sativa L.) (2015) rotation under conventional tillage and sprinkler irrigation. We evaluated the effectiveness of an enhanced-efficiency ...
- Handle:
- 10113/5801848
- DOI:
- 10.2136/sssaj2016.08.0254
- https://dx.doi.org/10.2136/sssaj2016.08.0254
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- Journal of environmental quality 2014 v.43 no.4 pp. 1101-1110
- ISSN:
- 0047-2425
- Subject:
- Long-Term Agroecosystem Research Network; air quality; ammonia; animal housing; anthropogenic activities; databases; emissions factor; farms; feeding methods; greenhouse gases; land application; livestock; livestock production; manure spreading; particulate emissions; pollutants; production technology
- Abstract:
- ... Ammonia, greenhouse gases, and particulate emissions from livestock operations can potentially affect air quality at local, regional, and even global scales. These pollutants, many of which are generated through various anthropogenic activities, are being increasingly scrutinized by regulatory authorities. Regulation of emissions from livestock production systems will ultimately increase on farm c ...
- DOI:
- 10.2134/jeq2014.06.0264
- https://dx.doi.org/10.2134/jeq2014.06.0264
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- Journal of environmental quality 2013 v.42 no.5 pp. 1583
- ISSN:
- 0047-2425
- Subject:
- Actinobacteria; Archaea; DNA; DNA libraries; DNA primers; Proteobacteria; bacteria; cattle; clones; dairies; feces; genes; methanogens; nucleotide sequences; ribosomal RNA; rumen; species diversity; waste lagoons; wastewater
- Abstract:
- ... Dairy wastewaters from storage ponds are commonly land applied to irrigate forage crops. Given that diverse microbial populations are associated with cattle feces, the objective of this study was to use a culture-independent approach to characterize bacteria and archaea in dairy wastewaters. Using domain-specific primers, a region of the 16S rRNA gene was amplified from pooled DNA extracts from 30 ...
- Handle:
- 10113/57710
- DOI:
- 10.2134/jeq2013.04.0134
- https://dx.doi.org/10.2134/jeq2013.04.0134
- Author:
- Leytem, April B., et al. ; Bjorneberg, David L.; Ippolito, James A.; Koehn, Anita C.; Show all 4 Authors
- Source:
- Journal of environmental quality 2015 v.44 no.2 pp. 552-559
- ISSN:
- 0047-2425
- Subject:
- case studies; conservation practices; drainage water; irrigation; irrigation water; monitoring; nutrients; phosphorus; ponds; sediments; surface water; suspended sediment; total maximum daily load; water quality; watersheds; Northwestern United States; Snake River
- Abstract:
- ... Watersheds using surface water for irrigation often return a portion of the water to a water body. This irrigation return flow often includes sediment and nutrients that reduce the quality of the receiving water body. Research in the 82,000-ha Upper Snake Rock (USR) watershed from 2005 to 2008 showed that, on average, water diverted from the Snake River annually supplied 547 kg ha⁻¹ of total suspe ...
- Handle:
- 10113/60495
- DOI:
- 10.2134/jeq2014.04.0166
- https://dx.doi.org/10.2134/jeq2014.04.0166
- Author:
- Leytem, April B., et al. ; Shao, Limin; Wang, Wanping; Griffiths, Peter R.; Show all 4 Authors
- Source:
- Journal of Applied Spectroscopy 2013 v.67 no.3 pp. 335
- ISSN:
- 0003-7028
- Subject:
- Environmental Protection Agency; Fourier transform infrared spectroscopy; ammonia; dairy farming; equipment; gas emissions; guidelines; methane; monitoring; nitrous oxide; quantitative analysis; spectral analysis; United States
- Abstract:
- ... The choice of the type of background spectrum affects the credibility of open-path Fourier transform infrared (OP/FT-IR) spectroscopic data, and consequently the quality of data analysis. We systematically investigated several properties of the background spectrum. The results show that a short-path background measured with the lowest amplifier gain could significantly reduce noise in the calculat ...
- Handle:
- 10113/60086
- DOI:
- 10.1366/12-06901
- http://dx.doi.org/10.1366/12-06901
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- Journal of environmental quality 2011 v.40 no.2 pp. 462
- ISSN:
- 1537-2537
- Subject:
- dairies; concentrated animal feeding operations; airborne transmission; endotoxins; prediction; mathematical models; wind direction; wind speed; animal behavior; Idaho
- Abstract:
- ... Endotoxins are derived from gram-negative bacteria and are a potent inducer of inflammatory reactions in the respiratory tract when inhaled. To assess daily fluctuations of airborne endotoxin and their potential for transport from dairies, endotoxin concentrations were monitored over an 8-h period at upwind (background) and downwind (5 m from edge of dairy) locations on three separate days at two ...
- Handle:
- 10113/49274
- DOI:
- 10.2134/jeq2010.0363
- https://dx.doi.org/10.2134/jeq2010.0363
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Klein, Marcus; Show all 3 Authors
- Source:
- Applied and environmental microbiology 2012 v.78 no.22 pp. 8089
- ISSN:
- 0099-2240
- Subject:
- Campylobacter jejuni; Cryptosporidium; DNA; Escherichia coli; Giardia; Leptospira; Listeria monocytogenes; Mycobacterium avium subsp. paratuberculosis; Salmonella enterica; Yersinia pseudotuberculosis; dairy industry; detection limit; pathogens; polymerase chain reaction; ponds; risk; sampling; wastewater; Idaho
- Abstract:
- ... Zoonotic pathogens in land-applied dairy wastewaters are a potential health risk. The occurrence and abundance of 10 pathogens and 3 fecal indicators were determined by quantitative real-time PCR (qPCR) in samples from 30 dairy wastewaters from southern Idaho. Samples tested positive for Campylobacter jejuni, stx(1)- and eaeA-positive Escherichia coli, Listeria monocytogenes, Mycobacterium avium s ...
- Handle:
- 10113/57926
- DOI:
- 10.1128/AEM.02470-12
- PubMed:
- 22983964
- PubMed Central:
- PMC3485929
- http://dx.doi.org/10.1128/AEM.02470-12
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- Journal of environmental quality 2009 v.38 no.5 pp. 1919-1923
- ISSN:
- 1537-2537
- Subject:
- Gram-negative bacteria; air quality; atmospheric circulation; public health; intensive livestock farming; wastewater; dairy manure; dairy cattle; risk assessment; animal health; spatial variation; wind direction; air microbiology; endotoxins; manure storage; waste lagoons; Idaho
- Abstract:
- ... Endotoxins are derived from gram-negative bacteria and are a potential respiratory health risk for animals and humans. To determine the potential for endotoxin transport from a large open-lot dairy, total airborne endotoxin concentrations were determined at an upwind location (background) and five downwind locations on three separate days. The downwind locations were situated at of the edge of the ...
- DOI:
- 10.2134/jeq2008.0504
- PubMed:
- 19643758
- https://dx.doi.org/10.2134/jeq2008.0504
- Author:
- Leytem, April B., et al. ; Bjorneberg, David L.; Show all 2 Author
- Source:
- Soil science 2009 v.174 no.8 pp. 445
- ISSN:
- 0038-075X
- Subject:
- soil fertility; phosphorus; soil test values; losses from soil; agricultural runoff; calcareous soils; soil amendments; dairy manure; composted manure; fertilizer application; phosphorus fertilizers; alum; furrow irrigation; irrigated soils; crop yield; grain yield; Hordeum vulgare; barley; Phaseolus vulgaris; Idaho
- Abstract:
- ... Intensification of the dairy industry in southern Idaho has led to the overapplication of manures and a buildup of soil phosphorus (P), which is a potential threat to water quality in the region. As the use of alum has been shown to reduce both soluble manure P and runoff P from alum-treated manures, the objective of this study was to determine if surface applications of alum to dairy manure and c ...
- Handle:
- 10113/33322
- DOI:
- 10.1097/SS.0b013e3181b0eac5
- http://dx.doi.org/10.1097/SS.0b013e3181b0eac5
- Author:
- Leytem, April B., et al. ; Tarkalson, David Dale; Show all 2 Author
- Source:
- Soil science 2009 v.174 no.2 pp. 73
- ISSN:
- 0038-075X
- Subject:
- dairy manure; liquid manure; soil amendments; fertilizer application; monoammonium phosphate; phosphorus fertilizers; phosphorus; leaching; agricultural soils; sandy loam soils; leachates; organic compounds; losses from soil; calcareous soils; chemical precipitation
- Abstract:
- ... The concentration of animal production in some areas of the United States has led to concern about the environmental fate of manure-derived phosphorus (P) in soils. A column study was conducted to quantify P leaching in a calcareous soil treated with monoammonium phosphate (MAP), two solid dairy manures (D1S and D2S), and two liquid dairy manures (D1L and D2L). A control with no P application was ...
- Handle:
- 10113/27435
- DOI:
- 10.1097/SS.0b013e31819750la
- http://dx.doi.org/10.1097/SS.0b013e31819750la
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- World journal of microbiology & biotechnology 2009 v.25 no.9 pp. 1505-1518
- ISSN:
- 0959-3993
- Subject:
- airborne microorganisms; analytical methods; animal feeding; bioaerosols; concentrated animal feeding operations; environmental health; polymerase chain reaction
- Abstract:
- ... The generation of airborne microorganisms from concentrated animal-feeding operations (CAFOs) is a concern from a human and animal health perspective. To better understand the airborne microorganisms found in these environments, a number of collection and analytical techniques have been utilized and will be discussed in this review. The most commonly used bioaerosol collection method is the liquid ...
- DOI:
- 10.1007/s11274-009-0043-1
- http://dx.doi.org/10.1007/s11274-009-0043-1
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Show all 2 Author
- Source:
- Aerobiologia 2009 v.25 no.4 pp. 265-273
- ISSN:
- 0393-5965
- Subject:
- endotoxins; filters; freeze-thaw cycles; glass; polypropylenes
- Abstract:
- ... The objective of this study was to fill in additional knowledge gaps with respect to the extraction, storage, and analysis of airborne endotoxin, with a specific focus on samples from a dairy production facility. We utilized polycarbonate filters to collect total airborne endotoxins, sonication as the extraction technique, and 0.05% Tween 20 in pyrogen-free water (PFW) as the extraction solution. ...
- DOI:
- 10.1007/s10453-009-9131-9
- http://dx.doi.org/10.1007/s10453-009-9131-9
- Author:
- Leytem, April B., et al. ; Dungan, Robert S.; Moore, Amber; Show all 3 Authors
- Source:
- Soil science 2011 v.176 no.8 pp. 426
- ISSN:
- 0038-075X
- Subject:
- Zea mays; animal health; application rate; calcareous soils; calcium; composted manure; corn silage; dairy industry; dairy manure; dry matter accumulation; forage crops; greenhouse experimentation; magnesium; manganese; microbial activity; monoammonium phosphate; nutrient availability; nutrient uptake; nutrient-nutrient interactions; phosphorus; potassium; soil sampling; soil treatment; zinc; Idaho
- Abstract:
- ... The expansion of the dairy industry in southern Idaho has led to increased application of manures to meet crop nutrient demands that can alter the uptake pattern of both macronutrients and micronutrients. A greenhouse study was conducted to determine the effects of dairy manure, composted dairy manure, and fertilizer (monoammonium phosphate) application on soil test phosphorus (P), microbial activ ...
- Handle:
- 10113/53745
- DOI:
- 10.1097/SS.0b013e31822391a6
- https://dx.doi.org/10.1097/SS.0b013e31822391a6
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