TY  - GEN
AU  - Stelly, Matthias
TI  - Moving up the yield curve: advances and obstacles
T2  - ASA special Publicatio; no.39
SN  - 0891180648
U1  - 581.1 
PY  - 1980///
CY  - Wisconsin
PB  - American Society of Agronomy
KW  - PLANTS
ER  -