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- Author:
- Douglas R. Smith, et al. ; Flynn Kyle C.; K. Colton Flynn; Sheri Spiegal; Peter J.A. Kleinman; Robert J. Meinen; Show all 6 Authors
- Source:
- Resources, conservation, and recycling 2023 v.188 no. pp. 106632
- ISSN:
- 0921-3449
- Subject:
- animal manure management; animals; circular economy; crop production; cropland; environmental quality; evolution; livestock production; pollution; quality of life; rangelands; stakeholders
- Abstract:
- ... The uncoupling of animal and crop production has resulted in long-term accumulation of manure nutrients in many areas, contributing to nutrient pollution. Prudent recycling of manure's nutrient resources requires reconnecting operations that produce manure with agricultural lands in need of nutrients. Thus the need to frame manure management via “manuresheds": the land (i.e. cropland, rangeland) s ...
- Handle:
- 10113/7916178
- DOI:
- 10.1016/j.resconrec.2022.106632
- https://doi.org/10.1016/j.resconrec.2022.106632
- Author:
- Douglas R. Smith, et al. ; Kabindra Adhikari; Chad Hajda; Phillip R. Owens; Show all 4 Authors
- Source:
- Agricultural & environmental letters 2022 v.7 no.1 pp. e20078
- ISSN:
- 2471-9625
- Subject:
- Zea mays; case studies; corn; crop yield; electrical conductivity; grain protein; grain quality; landscapes; lipid content; soil; soil map; soil quality; Texas
- Abstract:
- ... Studies show a strong relationship between soil health and crop yield, but those relating soil health and grain quality are limited. We studied the relationship between soil health and grain protein and oil content from a corn (Zea mays L.) field in Texas. Protein and oil content data were collected in the field with a CropScan monitor. Soil health values were measured at 202 locations using the H ...
- Handle:
- 10113/7802485
- DOI:
- 10.1002/ael2.20078
- https://doi.org/10.1002/ael2.20078
- Author:
- Douglas R. Smith, et al. ; Polley H. Wayne; Chris A. Kolodziejczyk; Katherine A. Jones; Show all 4 Authors
- Source:
- Rangeland ecology & management 2022 v.82 no. pp. 12-19
- ISSN:
- 1550-7424
- Subject:
- adaptive management; administrative management; drought; ecology; grasslands; growing season; normalized difference vegetation index; pastures; phytomass; rangelands; Texas
- Abstract:
- ... Drought is frequent on grasslands, often creating patches with reduced coverage of green vegetation that influence the trajectory of vegetation recovery following drought. Limiting the extent and sizes of low-cover patches thus should be a target of adaptive management on grazed grasslands, but quantifying patch sizes requires measurements at small spatial resolution. We used airborne (unmanned ae ...
- Handle:
- 10113/7664768
- DOI:
- 10.1016/j.rama.2022.01.008
- https://doi.org/10.1016/j.rama.2022.01.008
- Author:
- Douglas R. Smith, et al. ; Kabindra Adhikari; Harold Collins; Richard L. Haney; June E. Wolfe; Show all 5 Authors
- Source:
- Ecological indicators 2021 v.125 pp. 107482
- ISSN:
- 1470-160X
- Subject:
- ammonium nitrogen; carbon dioxide; clay; corn; crop yield; drought; health status; nitrate nitrogen; organic carbon; organic nitrogen; rain; silty clay soils; soil depth; soil quality; total nitrogen; Texas
- Abstract:
- ... The phrase “soil health” describes the condition of a soil in terms of its physical, chemical, and biological properties. The relationship between soil health and crop yield is rather complex, and quantifying their spatial characteristics at field scale is often limited in the literature. To explore the significance and spatial characteristics of soil health and its indicators in crop production, ...
- DOI:
- 10.1016/j.ecolind.2021.107482
- https://doi.org/10.1016/j.ecolind.2021.107482
- Author:
- Douglas R. Smith, et al. ; Xiaoqian Zhang; Igor M. Lopes; Ji-Qin Ni; Yongping Yuan; Chi-Hua Huang; Indrajeet Chaubey; Shubiao Wu; Show all 8 Authors
- Source:
- Journal of cleaner production 2021 v.307 pp. 127271
- ISSN:
- 0959-6526
- Subject:
- ammonium nitrogen; anaerobic digestion; animals; calcium; copper; dairy manure; feedstocks; iron; magnesium; manganese; organic fertilizers; pH; potassium; sodium; total Kjeldahl nitrogen; total phosphorus; zinc
- Abstract:
- ... Few studies have investigated the performance of anaerobic digestion (AD) to convert animal and agro-industrial wastes to organic fertilizers over a long-term field conditions. This paper studied three large-scale mesophilic digesters (D1–D3) over two years for their effects on feedstocks, which were dairy manure for D1 and D2 and co-digestion mixed manure and agro-industrial wastes for D3. Hydrau ...
- DOI:
- 10.1016/j.jclepro.2021.127271
- CHORUS:
- 10.1016/j.jclepro.2021.127271
- https://doi.org/10.1016/j.jclepro.2021.127271
- Author:
- Douglas R. Smith, et al. ; Polley Herbert W.; H. Wayne Polley; Chris A. Kolodziejczyk; Katherine A. Jones; Justin D. Derner; David J. Augustine; Show all 7 Authors
- Source:
- Rangeland ecology & management 2022 v.80 no. pp. 68-77
- ISSN:
- 1550-7424
- Subject:
- adaptive management; administrative management; biodiversity; cattle; fractional vegetation cover; pastures; rangelands; reflectance; steppes; variance; Colorado; Texas
- Abstract:
- ... Coverage of living (green) vegetation influences rangeland processes and biodiversity but remains a challenge to quantify at small spatial grain. We describe a technique for rapid airborne (unmanned aerial vehicle) measurements of continuous spatial coverage of living vegetation at a resolution (spatial grain) of 8 cm ground sampling distance. We then applied this technique at the pasture (paddock ...
- Handle:
- 10113/7569804
- DOI:
- 10.1016/j.rama.2021.10.001
- CHORUS:
- 10.1016/j.rama.2021.10.001
- https://doi.org/10.1016/j.rama.2021.10.001
- Author:
- Douglas R. Smith, et al. ; Kathryn E. Sanders; Peter C. Smiley Jr.; Robert B. Gillespie; Kevin W. King; Elizabeth A. Pappas; Show all 6 Authors
- Source:
- Journal of environmental quality 2020 v.49 no.6 pp. 1585-1598
- ISSN:
- 0047-2425
- Subject:
- community structure; environmental quality; fish; fish communities; habitat destruction; habitats; herbicides; hydrochemistry; riparian areas; spring; streams; water; Indiana; Ohio
- Abstract:
- ... Channelized agricultural headwater streams are common throughout agricultural watersheds in the midwestern United States. Understanding fish–habitat relationships within these streams will provide information that can assist with developing conservation and restoration strategies for these degraded streams. From spring 2006 to fall 2010, we collected fishes and measured riparian habitat, instream ...
- DOI:
- 10.1002/jeq2.20137
- https://doi.org/10.1002/jeq2.20137
- Author:
- Douglas R. Smith, et al. ; Robert Daren Harmel; Rick L. Haney; Peter M. Allen; Show all 4 Authors
- Source:
- Hydrological processes 2019 v.33 no.18 pp. 2384-2393
- ISSN:
- 0885-6087
- Subject:
- Vertisols; land use; nitrogen; nutrient content; organic fertilizers; overland flow; pastures; phosphorus; pollution load; preferential flow; rain; rhizosphere; runoff; seepage; soil profiles; surface water; vadose zone; water quality; watersheds; Texas
- Abstract:
- ... Recent studies have highlighted the agronomic and environmental importance of phosphorus (P) movement through the soil profile. Thus, faced with challenges such as high‐profile cases of P enrichment of surface water, better understanding of nutrient movement through soil is needed to better manage agricultural fertilizers and manures and their contribution to water quality degradation. In particul ...
- DOI:
- 10.1002/hyp.13474
- https://doi.org/10.1002/hyp.13474
- Author:
- Douglas R. Smith, et al. ; Helen P. Jarvie; R. Daren Harmel; Rick L. Haney; Show all 4 Authors
- Source:
- Journal of environmental quality 2019 v.48 no.5 pp. 1543-1548
- ISSN:
- 0047-2425
- Subject:
- agricultural runoff; base flow; carbon; fertilizer application; fields; land use; mineral fertilizers; nitrogen; pastures; phosphorus; poultry manure; soil; soil nutrients; soil sampling; stoichiometry; water quality; watersheds; Texas
- Abstract:
- ... Agricultural runoff is an important contributor to water quality impairment. This study was conducted to evaluate the potential role of field‐scale management on carbon (C), nitrogen (N), and phosphorus (P) stoichiometry in soils and runoff from agricultural fields. Cultivated and pasture fields at the Riesel watersheds in central Texas were used for this analysis, and nutrients were transformed t ...
- Handle:
- 10113/6718818
- DOI:
- 10.2134/jeq2018.09.0338
- https://doi.org/10.2134/jeq2018.09.0338
- Author:
- Douglas R. Smith, et al. ; Haw Yen; Jaehak Jeong; Show all 3 Authors
- Source:
- JAWRA Journal of the American Water Resources Association 2016 v.52 no.2 pp. 443-455
- ISSN:
- 1093-474X
- Subject:
- Soil and Water Assessment Tool model; agricultural watersheds; algorithms; calibration; guidelines; normal distribution; prediction; sampling; simulation models; variance; water quality; Texas
- Abstract:
- ... The primary advantage of Dynamically Dimensioned Search algorithm (DDS) is that it outperforms many other optimization techniques in both convergence speed and the ability in searching for parameter sets that satisfy statistical guidelines while requiring only one algorithm parameter (perturbation factor) in the optimization process. Conventionally, a default value of 0.2 is used as perturbation f ...
- Handle:
- 10113/62883
- DOI:
- 10.1111/1752-1688.12394
- CHORUS:
- 10.1111/1752-1688.12394
- https://doi.org/10.1111/1752-1688.12394
- Author:
- Douglas R. Smith, et al. ; Richard L. Haney; Elizabeth B. Haney; Michael J. White; Show all 4 Authors
- Source:
- Open journal of soil science 2017 v.7 no.11 pp. 301-314
- ISSN:
- 2162-5360
- Subject:
- aluminum; ammonium nitrogen; calcium; citrates; iron; lithium; nitrate nitrogen; nutrient availability; phosphorus; potassium; root exudates; soil analysis; soil nutrients; soil pH; soil quality
- Abstract:
- ... The soil extractant, H3A, has undergone several iterations to extract calcium (Ca), iron (Fe), aluminum (Al), potassium (K), phosphorus (P), ammonium (NH4-N) and nitrate (NO3-N) under ambient soil conditions. Few soil extractants currently used by commercial and university soil testing laboratories can perform multi-nutrient extraction without over- or under-estimating at least one nutrient. Soil ...
- Handle:
- 10113/6764830
- DOI:
- 10.4236/ojss.2017.711022
- https://doi.org/10.4236/ojss.2017.711022
- Author:
- Douglas R. Smith, et al. ; Richard L. Haney; Elizabeth B. Haney; Michael J. White; Show all 4 Authors
- Source:
- Applied soil ecology 2018 v.125 pp. 297-300
- ISSN:
- 0929-1393
- Subject:
- arginine; automation; carbon; carbon dioxide; citric acid; cover crops; microbial communities; peas; soil; soil respiration; soil sampling; vegetation; winter
- Abstract:
- ... Soil samples were obtained from under actively growing Austrian winter peas and from 2 m away in a plot that had no winter peas or other legumes growing in its cover crop mix. Soils were treated with 5 carbon (C) compounds (oxalic, malic, citric, glycine and arginine) and a control (deionized water). Microbial response was measured using an automated soil respiration system (ASRS). The soil under ...
- Handle:
- 10113/6112597
- DOI:
- 10.1016/j.apsoil.2017.12.016
- https://doi.org/10.1016/j.apsoil.2017.12.016
- Author:
- Douglas R. Smith, et al. ; Elizabeth A. Warnemuende-Pappas; Show all 2 Author
- Source:
- Soil & tillage research 2015 v.153 pp. 155-160
- ISSN:
- 0167-1987
- Subject:
- Glycine max; Zea mays; agricultural runoff; agricultural watersheds; ammonium nitrogen; atrazine; conservation practices; conventional tillage; corn; crop rotation; herbicide residues; losses from soil; nitrate nitrogen; no-tillage; nonpoint source pollution; nutrients; phosphorus; pollution load; rainfall simulation; risk; sediment yield; sediments; soybeans; surface water; water quality
- Abstract:
- ... Increasing soluble phosphorus (SP) loads to Lake Erie occurring around the same time as the implementation of no-tillage in the watershed has led to speculation that this important conservation practice is a primary cause of the SP loading. Thus, conservationists are interested in finding management practices that will minimize stratification of P, which may be common in no-tillage systems, while ...
- Handle:
- 10113/61155
- DOI:
- 10.1016/j.still.2015.04.004
- https://doi.org/10.1016/j.still.2015.04.004
- Author:
- Douglas R. Smith, et al. ; Richard L. Haney; Elizabeth B. Haney; R. Daren Harmel; Mike J. White; Show all 5 Authors
- Source:
- Applied soil ecology 2018 v.125 pp. 162-168
- ISSN:
- 0929-1393
- Subject:
- cost effectiveness; environmental quality; health status; human health; nitrogen; nutrient availability; organic acids and salts; pH; phosphorus; politics; potassium; soil analysis; soil organic matter; soil quality; soil respiration; soil texture
- Abstract:
- ... Soil health has traditionally been judged in terms of production; however, it recently has gained a wider focus with a global audience, as soil condition is becoming an environmental quality, human health, and political issue. A crucial initial step in evaluating soil health is properly assessing the condition of the soil. Currently most laboratory soil analyses treat soils as non-living, non-inte ...
- Handle:
- 10113/6112561
- DOI:
- 10.1016/j.apsoil.2017.07.035
- https://doi.org/10.1016/j.apsoil.2017.07.035
- Author:
- Douglas R. Smith, et al. ; Martha R. Zwonitzer; Michelle L. Soupir; Laura R. Jarboe; Show all 4 Authors
- Source:
- Journal of environmental quality 2016 v.45 no.2 pp. 609-617
- ISSN:
- 0047-2425
- Subject:
- Escherichia coli; adhesion; amoxicillin; antibiotic resistance; bacteria; chlortetracycline; conventional farming; erythromycin; farms; humans; kanamycin; land application; minimum inhibitory concentration; neomycin; organic foods; organic production; overland flow; pig manure; quantitative analysis; sand; silica; soil; statistical analysis; streptomycin; swine; tetracycline; tylosin
- Abstract:
- ... Broad-spectrum antibiotics are often administered to swine, contributing to the occurrence of antibiotic-resistant bacteria in their manure. During land application, the bacteria in swine manure preferentially attach to particles in the soil, affecting their transport in overland flow. However, a quantitative understanding of these attachment mechanisms is lacking, and their relationship to antibi ...
- Handle:
- 10113/62922
- DOI:
- 10.2134/jeq2015.05.0245
- https://doi.org/10.2134/jeq2015.05.0245
- Author:
- Douglas R. Smith, et al. ; Kevin W. King; Mark R. Williams; Show all 3 Authors
- Source:
- Journal of soil and water conservation 2015 v.70 no.2 pp. 27A-29A
- ISSN:
- 0022-4561
- Subject:
- Dreissena polymorpha; agricultural watersheds; algal blooms; animal manures; bioavailability; climate change; commodity prices; cropping systems; crops; ethanol production; farm management; farm size; fertilizer rates; glyphosate; herbicide resistance; lakes; losses from soil; nitrogen; no-tillage; nonpoint source pollution; nutrient use efficiency; on-farm research; phosphorus; phosphorus fertilizers; pollution load; soil analysis; soil biology; soil fertility; soil nutrients; soil pH; tile drainage; transgenic plants; water pollution; Lake Erie
- Abstract:
- ... Harmful and nuisance algal blooms have been increasing in size and extent since about 2000. In recent years, the release of the algal toxin microcystin has become a growing concern and has resulted in the inability to use water from Lake Erie as a drinking water source to the 400,000 residents of Toledo, Ohio in August, 2014. Farmers in the Western Lake Erie Basin have received the brunt of the bl ...
- Handle:
- 10113/60955
- DOI:
- 10.2489/jswc.70.2.27A
- https://doi.org/10.2489/jswc.70.2.27A
- Author:
- Douglas R. Smith, et al. ; Javier M. Gonzalez; Stan Livingston; Elizabeth Warnemuende-Pappas; Martha Zwonitzer; Show all 5 Authors
- Source:
- Journal of soils and sediments 2016 v.16 no.7 pp. 1921-1932
- ISSN:
- 1439-0108
- Subject:
- 2,4-D; atrazine; conservation practices; farms; glyphosate; metolachlor; pollutants; runoff; soil; Midwestern United States
- Abstract:
- ... PURPOSE: In a 6-year study, we investigated the effectiveness of blind inlets as a conservation practice in reducing pesticide losses compared to tile risers from two closed farmed depressional areas (potholes) in the US Midwest under a 4-year cropping rotation. MATERIALS AND METHODS: In two adjacent potholes within the same farm and having similar soils, a conventional tile riser and blind inlet ...
- DOI:
- 10.1007/s11368-016-1362-0
- https://doi.org/10.1007/s11368-016-1362-0
- Author:
- Douglas R. Smith, et al. ; R. Daren Harmel; Mark Williams; Richard Haney; Kevin W. King; Show all 5 Authors
- Source:
- Agricultural & environmental letters 2016 v.1 no.1 pp. -
- ISSN:
- 2471-9625
- Subject:
- diammonium phosphate; eutrophication; liquids; poultry manure; protocols; runoff; soil; surface water
- Abstract:
- ... Surface water eutrophication is a pervasive global problem, with P losses from agriculture often identified as a significant contributor. This study was conducted to evaluate the implications of fertilizer source and placement on soluble P (SP) losses in runoff. Using the National P Runoff Project protocol, SP losses in runoff from eight P fertilizers broadcast on the soil surface and three P fert ...
- DOI:
- 10.2134/ael2015.12.0015
- https://doi.org/10.2134/ael2015.12.0015
- Author:
- Douglas R. Smith, et al. ; Mark R. Williams; Stanley J. Livingston; Chad J. Penn; Kevin W. King; Chi-hua Huang; Show all 6 Authors
- Source:
- Journal of hydrology 2018 v.559 pp. 749-761
- ISSN:
- 0022-1694
- Subject:
- agricultural watersheds; algal blooms; basins; conservation practices; drainage; drainage systems; environmental factors; eutrophication; factor analysis; highlands; hysteresis; landscapes; nitrate nitrogen; nutrient availability; nutrient management; nutrient transport; phosphorus; poorly drained soils; prediction; storms; streams; surface water; Lake Erie; Midwestern United States
- Abstract:
- ... Understanding the processes controlling nutrient delivery in headwater agricultural watersheds is essential for predicting and mitigating eutrophication and harmful algal blooms in receiving surface waters. The objective of this study was to elucidate nutrient transport pathways and examine key components driving nutrient delivery processes during storm events in four nested agricultural watershed ...
- DOI:
- 10.1016/j.jhydrol.2018.02.079
- https://doi.org/10.1016/j.jhydrol.2018.02.079
- Author:
- Douglas R. Smith, et al. ; Kevin W. King; Mark R. Williams; Laura T. Johnson; Gregory A. LaBarge; Norman R. Fausey; Show all 6 Authors
- Source:
- Journal of environmental quality 2017 v.46 no.2 pp. 466-469
- ISSN:
- 0047-2425
- Subject:
- algal blooms; basins; drainage water; fertilizer application; nitrates; phosphorus fertilizers; pollution load; rain; reactive phosphorus; soil; soil analysis; Lake Erie
- Abstract:
- ... The Western Lake Erie Basin (WLEB) was inundated with precipitation during June and July 2015 (two to three times greater than historical averages), which led to significant nutrient loading and the largest in‐lake algal bloom on record. Using discharge and concentration data from three spatial scales (0.18–16,000 km²), we contrast the patterns in nitrate (NO₃–N) and dissolved reactive phosphorus ...
- Handle:
- 10113/5927831
- DOI:
- 10.2134/jeq2016.11.0434
- https://doi.org/10.2134/jeq2016.11.0434
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