TY  - BOOK
AU  - S S Cheema
TI  - Agronomy: Theory And Digest
SN  - 81-7096-449-8
U1  - 630 CHE/AG 
PY  - 1991///
CY  - Ludhiana
PB  - Kalyani
KW  - Agroforestry
KW  - crop ecology
KW  - cropping systems
ER  -