Comparison of agronomic effectiveness of primary apatite crystals and commercially available rock phosphate from Eppawala for some selected short term crops

Ratnayake, M.P.K.2021-06-092021-06-091996https://dl-ifs.nsf.gov.lk/handle/1/1966xx,145p.:ill, tableAgricultureComparison of agronomic effectiveness of primary apatite crystals and commercially available rock phosphate from Eppawala for some selected short term cropsThesisUniversity of PeradeniyaMPhil