TY  - BOOK
AU  - RAJINDER Singh
TI  - Effect of cereal and legume based cropping systems on crop yields, nutrient uptake and soil nitrogen
U1  - T 631.582 R14E 
PY  - 1993///
CY  - Ludhiana
PB  - PAU
KW  - CROPPING SYSTEMS
KW  - CROP ROTATION
ER  -