Mylavarapu, Rao, et al. “UF/IFAS/Extension/Soil/Testing/Laboratory/(ESTL)/Analytical/Procedures/and/Training/Manual:/CIR1248/SS312,/Rev./12//2014”. EDIS, vol. 2014, no. 10, Dec. 2014, p. 20, doi:10.32473/edis-ss312-2014.