TY  - BOOK
TI  - Sustainable agriculture: Issues, perspectives and prospects in semi arid tropics: Proceedings of the first international symposium on Natural resources management for a sustainable agriculture. Feb 1990, Delhi. V 1
U1  - 631 S 
PY  - 1990///
CY  - Delhi
PB  - ISA
KW  - Cover crops
KW  - Dryland management
KW  - Natural resources management
KW  - Nutrient management
KW  - Sustainable agriculture
ER  -