00286nam a2200109Ia 4500008004100000082002000041100002000061245003000081260004200111300001000153650001300163140113s9999    xx            000 0 und d  a631(047.1 L0.22  a" Brady, N. C."  aAdvances in agronomy v.22  b"New York : Academic Press Inc, 1970"  a462p.  aAgronomy