00310    a2200097   4500082001500000245004300015260006000058300002100118440005600139650001700195  a631.4bSOI  aSoilbthe yearbook of agriculture 1957  aWashingtonbThe United States Department of Agriculture  axiii,784p.c22cm  a85th Congress, 1st session, house of document No.30  aSoil science