00279nam a2200097Ia 4500008004100000082001500041100004800056245003500104260003400139300000800173140113s9999    xx            000 0 und d  a631.8   J6  a"Tisdale, Samuel L. and Nelson, Warner. L."  aSoil Fertility and Fertilizers  a1956bMacMillan Co.cNew York  a430