TY  - BOOK
AU  - Ray,Howard E.
AU  - Nambiar,E.K.S.
TI  - Soil fertility evaluation for increased farm production and profits
U1  - 631.45 
PY  - 1972///
CY  - New Delhi
PB  - Fertiliser Association of India
KW  - Soil fertility
KW  - Research
KW  - Soil conservation
KW  - Soil productivity
ER  -