TY  - BOOK
AU  - Sparks, Donald L
TI  - Advances in agronomy. V.87. 2005
U1  - 631/635 
PY  - 2005///
CY  - San Diego
PB  - Elsevier Academic Press
KW  - Antibiotic use
KW  - Global nitrogen consumption
KW  - Integrated crop management
ER  -