Changes in Soil Available Phosphorus, Leaf Phosphorus Content and Yield of Sword Bean (Canavalia ensiformis (L.) DC.) by Application of SP-36 and Phosphate Rock on Acid Upland Soil of East Lampung - Rivaie, Achmad Arivin; Assessment Institute for Agricultural Technology of Lampung (BPTP) Jl. H. ZA Pagar Alam No. 1A, Rajabasa, Bandar Lampung (UNIVERSITY OF LAMPUNG, 2016)