00521nam a22001697a 4500003000800000005001700008008004100025040002100066082001500087100002600102245007500128250001200203260003700215300003900252504005100291650000900342BD-DhUL20160110122134.0160110s1955    n  ab||| |||| 001 0 eng    aBD-DhULcBD-DhUL  a631.8bCOC1 aCollings, Gilbeart H.00aCommercial Fertilizers:bthere sources and use /cGilbeart H. Collings  a5th ed.  aNew York :bMcGraw Hill, cc1955  axi, 617 p. :bill., maps ;c23 cm.  aIncludes bibliographical references and index.  2Soil