. . . "Method of Hunter (1975) modified after ISFEI method. Particularly used for available P." . "Extr_ap15"@en . . "Extr_ap15" . "Hunter, A. 1975. New techniques and equipment for routine soil/plant analytical procedures. In: Soil Management in Tropical America. (eds E. Borremiza & A. Alvarado). N.C. State University, Raleigh, NC." .