TY  - BOOK
TI  - Advances in agronomy. V 08
U1  - 631/635 
PY  - 1956///
CY  - New York
PB  - Academic
KW  - Agronomy
KW  - Grass breeding
KW  - Nitrogen fertilizer
KW  - Soil calibration test
KW  - Soil management
ER  -