00398naa a2200133 a 450000100080000000500110000800800410001910000190006024500740007926000090015370000190016270000170018177300660019818392492010-01-10       1984    bl ---       0--  u    #d1 aTHURLOW, D. L.  aInfluence of conservation tillage systems on corn and soybean yields.  c19841 aEDWARDS, J. H.1 aEASON, J. T.  tHighlights of Agricultural Researchgv. 31, n. 2, p. 5, 1984.