TY  - BOOK
AU  - Hay Robert K M
AU  -  Porter John R
TI  - Physiology of crop yield
SN  - 1405108592 (pbk)
U1  - J:93, P6   TI 
PY  - 2006///
CY  - Oxford
PB  - Blackwell Publishing      
KW  -  Crop field
KW  -  Crops-field
KW  - Physiology
N1  - References 277-307p.; Index 309-314p
ER  -