00317nam a2200133Ia 4500003000400000005001700004008004100021082001300062100002000075245002900095260002900124300001700153650001300170OSt20150429163645.0140224s9999    xx            000 0 und d  a631 J0.2  aNorman, A.G.,ed  aAdvances in agronomy v.2  aNew YorkbAcademicc1950  av2(ix,407p.)  aAgronomy