00746nam a2200193ua 4500003001000000005001700010008004100027040003000068245013800098260009100236504004800327650002800375650001700403650001300420650002500433655001000458710004000468710004400508AR-SsjUCA20250716140443.0250228s1969    xxu           000 0 eng d  aAR-SsjUCAbspacAR-SsjUCA00aPhysiological aspects of crop yield :bproceedings of a symposium sponsored by the University of Nebraska ..[et al], Jan. 20-24,1969.  aMadison, WI :bAmerican Society of Agronomy :bCrop Science Society of America,c1969.  aBibliografía al final de cada capítulo. 4aAnatomía de la planta 4aBioquímica 4aCultivos 4aFisiología vegetal 4aTexto2 aAmerican Society of Agronomy. ASA. 2 aCrop Science Society of America. CSSA.