TY  - BOOK
AU  - Stelly,Matthias
AU  - Wirtz,Mary P.
AU  - 
AU  - 
AU  - 
TI  - Moving up the yield curve: advances and obstacles : proceedings of a symposium
SN  - 0891180648 (pbk.)
AV  - SB16 M69 1980
PY  - 1980///
CY  - Madison, Wis.
PB  - ASA, Soil Science Society of America
KW  - Crop yields
KW  - Congresses
KW  - Agronomy
N1  - Presented during the annual meeting in Chicago, Illinois, 3-8 December 1978; Includes bibliographical references
ER  -