TY  - BOOK
AU  - 
TI  - Advances in agronomy. Vol. 43
SN  - 0120007436
AV  - S405. A21
PY  - 1990///
CY  - San Diego
PB  - Academic Press, INC.
KW  -  
KW  - Crops.
KW  - Soil management.
ER  -