An efficient utilization of beef manure nutrients is important to improve the sustainability of animal and crop production systems and avoid unnecessary use of energy and non-renewable resources. Manure phosphorus (P) management differs from inorganic fertilizers for several reasons. Manure is variable in P concentration. It has both organic and inorganic P forms. Also, manure handling is more difficult than corn fertilizer. Organic P forms may not be entirely or immediately available for plant uptake but may become available over time. There is uncertainty about the crop-availability of beef manure P, which is reflected by a wide range (60 to 100%) of estimated availability in Iowa (see Extension publication PMR 1003). Therefore, a study was conducted at the ISU Armstrong Research Farm, Lewis, Iowa, in 2012 and 2013 to assess the crop-availability of manure P from selected Iowa beef production systems.
How to Cite:
Mallarino, A. P. & Haq, M. U., (2014) “Phosphorus Availability in Beef Cattle Manure for Corn and Soybean”, Iowa State University Research and Demonstration Farms Progress Reports 2013(1).