01082nam a2200277ua 4500003001000000005001700010008004100027020001800068040003000086245005700116260010300173490003400276500006000310504004800370650002300418650002400441650002000465650003200485650002200517650003200539655001700571710004600588710005100634999001700685952010200702AR-SsjUCA20250716140443.0250228s1980    xxu           000 0 eng d  a0-89118-064-8  aAR-SsjUCAbspacAR-SsjUCA00aMoving up the yield curve :badvances and obstacles.  aMadison, WI :bAmerican Society of Agronomy :bSoil Science Society of America,c1980 (reimp.1983)0 aASA special publication ;v39  aProceedings of a symposium .. Chicago,Il. 3-8 Dec.1978.  aBibliografía al final de cada capítulo. 4aBioquímica98256 4aConferencias924139 4aCultivos924135 4aFisiología vegetal924141 4aNutrientes920447 4aProducción vegetal924182 4aTexto9240882 aAmerican Society of Agronomy. ASA.9256142 aSoil Science Society of America. SSSA. 925203  c16941d16941  00104070aCAbCAd2014-10-11l0o581.19 MOVu Ej.1pXCA1588r2025-07-15 00:00:00w2025-07-15yLB