00274nam a2200097Ia 4500008004100000082002600041100003800067245003600105260002700141300000800168140113s9999    xx            000 0 und d  a631.42:631.427.3   L3  a"Walsh, L.M. & Beaton, J.D.,eds."  aSoil Testing and Plant Analysis  a1973bS.S.S.A.cU.S.A.  a491