TY  - SER
AU  - Sparks , Donald L. ,
TI  - Advances in Agronomy Vol. 102
SN  - 9780123748188
U1  - 630 
PY  - 2009///
CY  - Amsterdam
PB  - Elsevier Academic Press
KW  - Agriculture. & related technologies
KW  - Agronomy
ER  -