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losses from soil
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water pollution
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watersheds
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- Author:
- P. B. DeLaune; P. A. Moore; D. K. Carman; A. N. Sharpley; B. E. Haggard; T. C. Daniel
- Source:
- Journal of environmental quality 2004 v.33 no.6 pp. 2192-2200
- ISSN:
- 1537-2537
- Subject:
- water pollution; water quality; pastures; fertilizer rates; agricultural runoff; poultry manure; watersheds; losses from soil; nonpoint source pollution; field experimentation; soil test values; phosphorus; rainfall simulation; Oklahoma; Arkansas
- Abstract:
- ... A phosphorus (P) index for pastures was developed to write nutrient management plans that determine how much P can be applied to a given field. The objectives of this study were to (i) evaluate and compare the P index for pastures, particularly the P source component, and an environmental threshold soil test P level by conducting rainfall simulations on contrasting soils under various management s ...
- Handle:
- 10113/9082
- DOI:
- 10.2134/jeq2004.2192
- PubMed:
- 15537942
- https://doi.org/10.2134/jeq2004.2192
- Author:
- A. Bakhsh; J. L. Hatfield; R. S. Kanwar; L. Ma; L. R. Ahuja
- Source:
- Journal of environmental quality 2004 v.33 no.1 pp. 114-123
- ISSN:
- 1537-2537
- Subject:
- water pollution; agricultural soils; simulation models; Zea mays; Glycine max; nitrogen; soybeans; nitrate nitrogen; corn; watersheds; losses from soil; drainage water; crop yield; soil horizons; Root Zone Water Quality Model; soil texture; application rate; subsurface drainage; Iowa
- Abstract:
- ... This study was designed to evaluate the improved version of the Root Zone Water Quality Model (RZWQM) using 6 yr (1992–1997) of field-measured data from a field within Walnut Creek watershed located in central Iowa. Measured data included subsurface drainage flows, NO₃–N concentrations and loads in subsurface drainage water, and corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] yields. The d ...
- Handle:
- 10113/9105
- DOI:
- 10.2134/jeq2004.1140
- PubMed:
- 14964365
- https://doi.org/10.2134/jeq2004.1140
- Author:
- Sharpley, A.N.; Kleinman, P.J.A.; McDowell, R.W.; Gitau, M.; Bryant, R.B.
- Source:
- Journal of soil and water conservation 2002 v.57 no.6 pp. 425-439
- ISSN:
- 0022-4561
- Subject:
- water pollution; overland flow; simulation models; animal manures; agricultural land; phosphorus fertilizers; watersheds; losses from soil; soil fertility; phosphorus; water erosion; subsurface flow
- Abstract:
- ... Skip to main page content HOME CURRENT ISSUE ARCHIVE FEEDBACK SUBSCRIPTIONS ALERTS HELP Keywords Search Advanced »User Name Password Sign In Modeling phosphorus transport in agricultural watersheds: Processes and possibilities A. N. Sharpley, P. J. A. Kleinman, R. W. McDowell, M. Gitau, and R. B. Bryant ABSTRACT: Modeling phosphorus (P) loss from agricultural watersheds is key to quantifying the l ...
- Handle:
- 10113/23631
- Author:
- Andrew N. Sharpley; Richard W. McDowell; Jennifer L. Weld; Peter J. A. Kleinman
- Source:
- Journal of environmental quality 2001 v.30 no.6 pp. 2026-2036
- ISSN:
- 1537-2537
- Subject:
- water pollution; land classification; animal manures; fields; leaching; risk assessment; watersheds; losses from soil; nonpoint source pollution; rain; soil fertility; manure spreading; phosphorus; water erosion; runoff; Revised Universal Soil Loss Equation; nutrient management; Pennsylvania
- Abstract:
- ... A P index was developed as a tool to rank agricultural fields on the basis of P loss vulnerability, helping to target remedial P management options within watersheds. We evaluated two approaches, a soil P threshold and components of a P index, by comparing site vulnerability estimates derived from these two approaches with measured runoff P losses in an agricultural watershed in Pennsylvania. Rain ...
- Handle:
- 10113/12926
- DOI:
- 10.2134/jeq2001.2026
- PubMed:
- 11790010
- https://doi.org/10.2134/jeq2001.2026
- Author:
- McDowell, R.W.; Sharpley, A.N.; Beegle, D.B.; Weld, J.L.
- Source:
- Journal of soil and water conservation 2001 v.56 no.4 pp. 306-315
- ISSN:
- 0022-4561
- Subject:
- phosphorus; losses from soil; runoff; pollution control; watersheds; water pollution; soil fertility; cattle manure; poultry manure; risk assessment; phosphorus fertilizers; pig manure; application rate; fertilizer requirements; nonpoint source pollution; Pennsylvania
- Abstract:
- ... The persistence of water quality problems has directed attention toward reduction of agricultural non-point sources of phosphorus (P). We assessed the practical impact of three management scenarios of the USDA-EPA Strategy for Animal Feeding Operations to reduce P losses from Mahantango Creek watershed in Pennsylvania, USA. Using an agronomic threshold of 50 mg Mehlich-3 P kg-1 soil, 55% of the wa ...
- Handle:
- 10113/23630
- Author:
- Yuan, Y.; Bingner, R.L.; Rebich, R.A.
- Source:
- Transactions of the ASAE 2001 v.44 no.5 pp. 1183-1190
- ISSN:
- 0001-2351
- Subject:
- watersheds; crop production; crop management; cover crops; winter; pollution control; water pollution; erosion control; water erosion; sediment yield; simulation models; agricultural land; losses from soil; runoff; prediction; best management practices; nonpoint source pollution; Mississippi
- Abstract:
- ... Sediment and its associated pollutants entering a water body can be very destructive to the health of that system. Best Management Practices (BMPs) can be used to reduce these pollutants, but understanding the most effective practices is very difficult. Watershed models are the most cost-effective tools to aid in the decision-making process of selecting the BMP that is most effective in reducing t ...
- Handle:
- 10113/26652
- Author:
- McDowell, R.; Sharpley, A.; Folmar, G.
- Source:
- Journal of environmental quality 2001 v.30 no.5 pp. 1587-1595
- ISSN:
- 0047-2425
- Subject:
- phosphorus; losses from soil; watersheds; water pollution; Pennsylvania
- Abstract:
- ... Many source and transport factors control P loss from agricultural landscapes; however, little information is available on how these factors are linked at a watershed scale. Thus, we investigated mechanisms controlling P release from soil and stream sediments in relation to storm and baseflow P concentrations at four flumes and in the channel of an agricultural watershed. Baseflow dissolved reacti ...
- Handle:
- 10113/18824
- PubMed:
- 11577864
- Author:
- Novak, J.M.; Watts, D.W.; Stone, K.C.; Johnson, M.H.
- Source:
- Transactions of the ASAE 2001 v.44 no.5 pp. 1201-1206
- ISSN:
- 0001-2351
- Subject:
- water pollution; atrazine; cyanazine; agricultural land; herbicide residues; watersheds; losses from soil; streams; seasonal variation; metolachlor; alachlor; ametryn; coastal plains; North Carolina
- Abstract:
- ... Herbicide detection in surface water sources has caused concern about contamination of these sources and adverse effects on human and aquatic health. Understanding surface water herbicide transport from agriculturally intensive watersheds is useful for development of herbicide best management practices to reduce off-site movement. The seasonal occurrence and load of five herbicides exported by a s ...
- Handle:
- 10113/18427
- Author:
- Sharpley, A.; Smith, S.J.; Zollweg, J.A.; Coleman, G.A.
- Source:
- Journal of soil and water conservation 1996 v.51 no.6 pp. 498-503
- ISSN:
- 0022-4561
- Subject:
- water pollution; sediments; simulation models; water quality; pollution control; Cynodon dactylon; agricultural land; nitrogen; ponds; bioavailability; watersheds; losses from soil; land restoration; cost benefit analysis; eutrophication; gully erosion; phosphorus; runoff; Oklahoma
- Abstract:
- ... Erosion of agricultural land and transport of associated fertilizer chemicals nitrogen (N) and phosphorus (P) in runoff, can be detrimental to both soil productivity and water quality. In the Southern Plains, gully erosion is of concern due to periodically intense rainfall and a large acreage of erodible soils. As little information is available, we studied the loss of sediment, N, and P in runoff ...
- Handle:
- 10113/20714
- Author:
- S. J. Smith; A. N. Sharpley; W. A. Berg; J. W. Naney; G. A. Coleman
- Source:
- Journal of environmental quality 1992 v.21 no.4 pp. 595-601
- ISSN:
- 0047-2425
- Subject:
- grasslands; water quality; watersheds; land use; range management; runoff; surface water; groundwater; nutrients; losses from soil; nitrogen; phosphorus; pH; grasses; grazing; rain; fertilizers; gully erosion; water pollution; sediments; Oklahoma; Texas
- Abstract:
- ... Water quality information regarding grasslands in the Southern Plains of Oklahoma and Texas is sparse. The objective of this study was to determine the extent to which the area's surface and groundwater quality is influenced by native and introduced grass management practices. Concentrations and amounts of sediment, N, and P in surface runoff water were determined for 14, 1- to 6-ha watersheds in ...
- Handle:
- 10113/20214
- DOI:
- 10.2134/jeq1992.00472425002100040012x
- https://doi.org/10.2134/jeq1992.00472425002100040012x