caa a22 4500 388054301 CHVBK 20180307125101.0 cr unu---uuuuu 161130e199806 xx s 000 0 eng 10.1017/S0889189300007670 doi S0889189300007670 pii (NATIONALLICENCE)cambridge-10.1017/S0889189300007670 Feedlot manure nutrient loadings on South Dakota farmland [Elektronische Daten] A key determinant of whether livestock manure is an asset or liability for agricultural producers and for society more generally is the amount produced relative to the nearby farmland area to which it can be economically transported for application. The objectives of this study are to estimate manure N and P loadings on the cropland and rangeland associated with 78 feedlot farm operations in South Dakota and to determine if they are greater for larger feedlots. A substantial fraction of the feedlot operators studied apply plant-available N and P in livestock manure at rates that exceed crop and grass fertility requirements, and intensity of manure nutrient loadings on cropland is strongly and positively related to feedlot size. These findings raise a warning regarding possible nonpoint-source pollution of vulnerable water resources from manure produced by fed cattle in larger feedlots. Copyright © Cambridge University Press 1998 fed cattle nationallicence feedlots nationallicence manure production nationallicence manure disposition nationallicence Taylor Donald C. Professor Emeritus of Agricultural Economics, South Dakota State University, Brookings, South Dakota Rickerl Diane H. Professor of Plant Science, South Dakota State University, Brookings, South Dakota. American Journal of Alternative Agriculture Cambridge University Press 13/2(1998-06), 61-68 0889-1893 13:2<61 1998 13 AJA https://doi.org/10.1017/S0889189300007670 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0889189300007670 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Taylor Donald C. Professor Emeritus of Agricultural Economics, South Dakota State University, Brookings, South Dakota NATIONALLICENCE 700 1- Rickerl Diane H. Professor of Plant Science, South Dakota State University, Brookings, South Dakota NATIONALLICENCE 773 0- American Journal of Alternative Agriculture Cambridge University Press 13/2(1998-06), 61-68 0889-1893 13:2<61 1998 13 AJA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge