{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,5]],"date-time":"2025-11-05T20:41:06Z","timestamp":1762375266044,"version":"build-2065373602"},"reference-count":47,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2008,7,1]],"date-time":"2008-07-01T00:00:00Z","timestamp":1214870400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["acsess.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Env Quality"],"published-print":{"date-parts":[[2008,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The use of spectroscopic techniques (especially phosphorus\u201031 nuclear magnetic resonance [<jats:sup>31<\/jats:sup>P\u2010NMR] and X\u2010ray absorption near edge structure spectroscopy) has recently advanced the analysis of the speciation of P in poultry litter (PL) and greatly enhanced our understanding of changes in P pools in PL that receive alum (aluminum sulfate) to reduce water\u2010soluble P and control ammonia emissions from poultry houses. Questions remain concerning changes of P species during long\u2010term storage, drying, or after application of PL to cropland or for other uses, such as turfgrass. In this study, we investigated a set of six PL samples (of which three were alum\u2010amended and three were unamended) that had been characterized previously. The P speciation was analyzed using solid\u2010state <jats:sup>31<\/jats:sup>P\u2010NMR spectroscopy, and the mineralogy was analyzed by powder X\u2010ray diffraction (XRD) after storing the samples moist and dried for up to 5 yr under controlled conditions. The magnesium ammonium phosphate mineral struvite was identified in all but one PL samples. Struvite concentrations were generally lower in dried samples (\u226414%) than in samples stored moist (23 and 26%). The moist samples also had higher concentrations of phosphate bound to aluminum hydroxides. Solid\u2010state NMR spectroscopy was in general more sensitive than XRD in detecting and quantifying P species. Although phosphate associated with calcium and aluminum made up a large proportion of P species, they were not detected by XRD.<\/jats:p>","DOI":"10.2134\/jeq2007.0331","type":"journal-article","created":{"date-parts":[[2008,6,23]],"date-time":"2008-06-23T21:44:25Z","timestamp":1214257465000},"page":"1617-1625","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["Evidence for Struvite in Poultry Litter: Effect of Storage and Drying"],"prefix":"10.1002","volume":"37","author":[{"given":"Stefan","family":"Hunger","sequence":"first","affiliation":[{"name":"Dep. of Earth and Environment Univ. of Leeds Leeds LS2 9JT UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. 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