Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Jennifer L. Weld"'
Autor:
Jennifer L. Weld, D. B. Beegle, Karl Czymmek, Quirine M. Ketterings, Peter J. A. Kleinman, Sebastian Cela
Publikováno v:
Journal of Soil and Water Conservation. 71:281-288
State phosphorus indices (PIs) are being evaluated across the United States due to variability in phosphorus (P) management recommendations and questions about the lack of water quality improvement in some watersheds. Nutrient management planners in
Autor:
Carl H. Bolster, John A. Lory, Zachary M. Easton, D. B. Beegle, Peter J. A. Kleinman, Andrew N. Sharpley, Jennifer L. Weld, Tamie L. Veith, Claire Baffaut, A. Collick, Deanna L. Osmond, David E. Radcliffe, Nathan O. Nelson
Publikováno v:
Journal of environmental quality. 46(6)
Critical source area identification through phosphorus (P) site assessment is a fundamental part of modern nutrient management planning in the United States, yet there has been only sparse testing of the many versions of the P Index that now exist. E
Publikováno v:
Journal of environmental quality. 46(6)
Phosphorus (P) site assessment is used nationally and internationally to assess the vulnerability of agricultural fields to P loss and identify high-risk areas controlling watershed P export. Current efforts to update P site assessment tools must ens
Autor:
Peter J. A. Kleinman, Jian Liu, Lou S. Saporito, John P. Schmidt, Jennifer L. Weld, Douglas B. Beegle, Andrew N. Sharpley
Publikováno v:
Nutrient Cycling in Agroecosystems. 103:101-114
Stacking poultry litter in fields prior to land application is a common practice that provides important logistical benefits to farmers, but may lead to environmental losses of nutrients. A 2-year field study was conducted to evaluate phosphorus (P)
Autor:
Amy S. Collick, Zachary M. Easton, Michael J. White, Ray B. Bryant, Jennifer L. Weld, Tamie L. Veith, Peter J. A. Kleinman, Carl H. Bolster, Daniel R. Fuka, Anthony R. Buda
Publikováno v:
Hydrological Processes. 29:588-601
Phosphorus (P) loss from agricultural watersheds has long been a critical water quality problem, the control of which has been the focus of considerable research and investment. Preventing P loss depends on accurately representing the hydrological an
Autor:
Amy S. Collick, Peter J. A. Kleinman, Jennifer L. Weld, Ray B. Bryant, R. Daren Harmel, Daniel R. Fuka, Anthony R. Buda, Michael J. White, Peter A. Vadas, Zachary M. Easton, Tamie L. Veith
Publikováno v:
Journal of environmental quality. 45(4)
Watershed models such as the Soil Water Assessment Tool (SWAT) and the Agricultural Policy Environmental EXtender (APEX) are widely used to assess the fate and transport of agricultural nutrient management practices on soluble and particulate phospho
Autor:
Ann M. Wolf, Peter J. A. Kleinman, Andrew N. Sharpley, Herschel A. Elliott, R. C. Brandt, Douglas B. Beegle, Jennifer L. Weld
Publikováno v:
Communications in Soil Science and Plant Analysis. 37:2137-2155
Widespread implementation of the phosphorus (P) index has focused attention on environmental manure tests that can be used to estimate the relative availability of P in manure to runoff water. This article describes the development and use of a water
Publikováno v:
New Zealand Journal of Agricultural Research. 47:461-477
Phosphorus (P), an essential nutrient in crop and livestock agriculture, can cause and accelerate freshwater eutrophication. Intensification of farming systems has resulted in local accumulations of P in some agricultural watersheds with related incr
Publikováno v:
Journal of Environmental Quality. 30:2026-2036
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 com
Publikováno v:
Nutrient Cycling in Agroecosystems. 59:29-38
Surface runoff accounts for much of the phosphorus (P) input to and accelerated eutrophication of the fresh waters. Several states have tried to establish general threshold soil P levels above which the enrichment of surface runoff P becomes unaccept