TY  - BOOK
AU  - Govinda Rajan, S.V.
TI  - Soil and crop productivity
U1  - 631.4 G60S 
PY  - 1971///
CY  - Bombay
PB  - Asia
KW  - INDIA -- SOIL
KW  - CROP YIELDS
KW  - SOIL
ER  -