TY  - BOOK
AU  - Singh, S.S.
TI  - Principles and practices of agronomy/by S.S. Singh 
SN  - 8176638587
U1  - 631 
PY  - 2006///
CY  - Ludhiana
PB  - Kalyani Publishers
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Agronomy
ER  -