TY  - BOOK
AU  - Karthikakuttyamma M
AU  - Balan M V
AU  - George C M
TI  - Available phosphorus and potassium status of rubber growing soils in relation to manuring of leguminous ground covers
PY  - 1976///
PB  - Rubber Board Bulletin
KW  - Rock phosphate
KW  - Rubber soil
ER  -