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- 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:
- J.K. Aase; D.L. Bjorneberg; D.T. Westermann
- Source:
- Journal of environmental quality 2001 v.30 no.4 pp. 1315-1323
- ISSN:
- 1537-2537
- Subject:
- water pollution; phosphorus; losses from soil; calcareous soils; silt loam soils; irrigated soils; sprinkler irrigation; soil analysis; runoff; Idaho
- Abstract:
- ... Phosphorus (P) in irrigation runoff may enrich offsite water bodies and streams and be influenced by irrigation water quality and antecedent soil surface conditions. Runoff, soil loss, and P fractions in runoff using reverse osmosis (RO) water or mixed RO and well water (RO/Tap) were studied in a laboratory sprinkler study to evaluate water source effects on P transport. A top- or subsoil Portneuf ...
- Handle:
- 10113/14886
- DOI:
- 10.2134/jeq2001.3041315x
- PubMed:
- 11476510
- https://doi.org/10.2134/jeq2001.3041315x
- 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
6. Polyacrylamide for surface irrigation to increase nutrient-use efficiency and protect water quality
- Author:
- Lentz, R.D.; Sojka, R.E.; Robbins, C.W.; Kincaid, D.C.; Westermann, D.T.
- Source:
- Communications in soil science and plant analysis 2001 v.32 no.7/8 pp. 1203-1220
- ISSN:
- 0010-3624
- Subject:
- sediment yield; water pollution; irrigation water; surface irrigation; polyacrylamide; nitrogen; pollution control; furrow irrigation; leaching; losses from soil; erosion control; chemical oxygen demand; phosphorus; water erosion; runoff; nitrates; additives
- Abstract:
- ... Furrow irrigation systems have a greater application capacity, are less costly, and use less energy than sprinkler systems but furrow irrigation produces greater runoff, erosion, and deep percolation losses. Phosphorus (P) and nitrogen (N) losses are associated with runoff sediment, and can be minimized by eliminating irrigation-induced erosion. Excessive leaching of inorganic and organic solutes ...
- Handle:
- 10113/30622
- 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:
- Dabney, S.M.; Delgado, J.A.; Reeves, D.W.
- Source:
- Communications in soil science and plant analysis 2001 v.32 no.7/8 pp. 1221-1250
- ISSN:
- 0010-3624
- Subject:
- cover crops; Secale cereale; Triticum aestivum; winter; erosion control; water erosion; nutrients; losses from soil; water quality; pesticide residues; water pollution; pollution control; soil fertility; soil properties; crop production; Daucus carota; Spinacia oleracea; Lactuca sativa; Solanum tuberosum; Colorado
- Abstract:
- ... This article reviews literature about the impacts of cover crops in cropping systems that affect soil and water quality and presents limited new information to help fill knowledge gaps. Cover crops grow during periods when the soil might otherwise be fallow. While actively growing, cover crops increase solar energy harvest and carbon flux into the soil, providing food for soil macro and microorgan ...
- Handle:
- 10113/30335