Mylavarapu, Rao. “UF/IFAS Extension Soil Testing Laboratory (ESTL) Analytical Procedures and Training Manual: CIR1248/SS312, Rev. 2/2009”. EDIS 2009, no. 2 (February 1, 2009): 14. Accessed April 20, 2024. https://journals.flvc.org/edis/article/view/126880.