1. Polyvalent cation effects on myo-inositol hexakis dihydrogenphosphate enzymatic dephosphorylation in dairy wastewater.;Dao;J Environ Qual,2003
2. Bioavailability of soil inorganic P in the rhizosphere as affected by root-induced chemical changes: A review.;Plant Soil,2001
3. One hundred years of the Kjeldahl method for nitrogen determination.;Arch Acker Pflanzenbau Bodenkd,1998
4. Agricultural Phosphorus and Eutrophication. ARS-149. US Department of Agriculture, Agricultural Research Service, Beltsville, MD. Available at: .;Sharpley;Accessed July,2003
5. Emerging issues in the U.S. organic industry. US Department of Agriculture, Economic Research Service, Bulletin No. 55. Washington, DC. Available at: .;Accessed July,2009