TY  - BOOK
AU  - Singh,S.S.
TI  - Soil fertility and nutrient management
U1  - 631.422 23
PY  - 2004///
CY  - Ludhiana : 
PB  - Kalyani Publishers, 
KW  - Fertilizers
KW  - Soil fertility
KW  - Crops
KW  - Nutrition
KW  - fast
ER  -