TY  - BOOK
AU  - Hay, Robert K M
AU  - Porter, John R 
TI  - Physiology of Crop Yield
SN  - 9781405108591
U1  - 633 
PY  - 2006///
CY  - Oxford
PB  - Blackwell Publishing
KW  - Crop yields
KW  - Crops--Physiology
ER  -