TY  - BK
TI  - Moving up the yield curve:  advances and obstacles : proceedings of a symposium sponsored by Divisions S-4, S-8, and A-4 of the American Society of Agronomy and the Soil Science Society of America
T2  - ASA Special Publication
SN  - 08-911-80648
U1  - 82-742165 
PY  - 1980///
CY  - Madison, WI (USA)
PB  - Published by the American Society of Agronomy, Soil Science Society of America, 
KW  - Plant production
N1  - ill. Includes bibliographic references. "The papers were presented during the annual meeting in Chicago, Illinois, 3-8 December, 1978."
ER  -