TY  - BOOK
ED  - American Society of Agronomy. ASA.
ED  - Soil Science Society of America. SSSA. 
TI  - Moving up the yield curve: advances and obstacles
T2  - ASA special publication
SN  - 0-89118-064-8
PY  - 1980/// (reimp.1983)
CY  - Madison, WI
PB  - American Society of Agronomy, Soil Science Society of America
KW  - BioquÃ­mica
KW  - Conferencias
KW  - Cultivos
KW  - FisiologÃ­a vegetal
KW  - Nutrientes
KW  - ProducciÃ³n vegetal
KW  - Texto
N1  - Proceedings of a symposium .. Chicago,Il. 3-8 Dec.1978; BibliografÃ­a al final de cada capÃ­tulo
ER  -