TY  - BOOK
AU  - Carlson,Peter S.
TI  - The biology of crop productivity
SN  - 0121598500
AV  - S494.5.P75 B56
U1  - 631 
PY  - 1980///
CY  - San Francisco
PB  - Academic Press
KW  - Crop yields
KW  - Crops
KW  - Physiology
N1  - Includes bibliographies and index
ER  -