TY  - BOOK
AU  - 
TI  -  Advances in agronomy. Vol. 49
SN  - 0120007495
AV  - S405. A21
PY  - 1993///
CY  - San Diego, Calif ; London : 
PB  - Academic Press, 
KW  -  
KW  - Crops.
KW  - Soil management
ER  -