{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T09:04:58Z","timestamp":1768467898836,"version":"3.49.0"},"reference-count":64,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2007,1,1]],"date-time":"2007-01-01T00:00:00Z","timestamp":1167609600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["acsess.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Env Quality"],"published-print":{"date-parts":[[2007,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Agricultural P transport in runoff is an environmental concern. An important source of P runoff is surface\u2010applied, unincorporated manures, but computer models used to assess P transport do not adequately simulate P release and transport from surface manures. We developed a model to address this limitation. The model operates on a daily basis and simulates manure application to the soil surface, letting 60% of manure P infiltrate into soil if manure slurry with less than 15% solids is applied. The model divides manure P into four pools, water\u2010extractable inorganic and organic P, and stable inorganic and organic P. The model simulates manure dry matter decomposition, and manure stable P transformation to water\u2010extractable P. Manure dry matter and P are assimilated into soil to simulate bioturbation. Water\u2010extractable P is leached from manure when it rains, and a portion of leached P can be transferred to surface runoff. Eighty percent of manure P leached into soil by rain remains in the top 2 cm, while 20% leaches deeper. This 2\u2010cm soil layer contributes P to runoff via desorption. We used data from field studies in Texas, Pennsylvania, Georgia, and Arkansas to build and validate the model. Validation results show the model accurately predicted cumulative P loads in runoff, reflecting successful simulation of the dynamics of manure dry matter, manure and soil P pools, and storm\u2010event runoff P concentrations. Predicted runoff P concentrations were significantly related to (<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup> = 0.57) but slightly less than measured concentrations. Our model thus represents an important modification for field or watershed scale models that assess P loss from manured soils.<\/jats:p>","DOI":"10.2134\/jeq2006.0213","type":"journal-article","created":{"date-parts":[[2007,1,10]],"date-time":"2007-01-10T20:13:36Z","timestamp":1168460016000},"page":"324-332","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":92,"title":["A Model for Phosphorus Transformation and Runoff Loss for Surface\u2010Applied Manures"],"prefix":"10.1002","volume":"36","author":[{"given":"P. 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