TY  - BOOK
TI  - Advances in agronomy. V 07
U1  - 631/635 
PY  - 1955///
CY  - New York
PB  - Academic
KW  - Agronomy
KW  - Mineral nutrition
KW  - Soil nitrogen
KW  - US crops
KW  - Weed control
ER  -