TY  - BOOK
AU  - Stelly,Matthias
AU  - Wirtz,Mary P.
TI  - Moving up the yield curve: advances and obstacles : proceedings of a symposium 
SN  - 0891180648
PY  - 1980///
CY  - Madison, Wisconsin
PB  - American Society of Agronomy
KW  - Crop yields
KW  - Congresses
KW  - Agriculture
N1  - 'Presented during the annual meeting in Chicago, Illinois, 3-8, December, 1978'; Includes bibliographies
ER  -