Abstract
Abstract A field study was conducted on a black Solonetzic soil in east‐central Alberta to determine the influence of surface applications of gypsum, lime, and ammonium nitrate, alone and in combinations, on soil chemical properties, grain yield, and chemical composition of barley. The Ca amendments were applied once in fall 1982; ammonium nitrate was applied each spring before sowing of barley in 1986, 1987, and 1988. Gypsum increased the concentration of soluble and extractable Ca in the Ap horizon, but the effect of lime was significant only on extractable Ca. Gypsum also reduced SAR (sodium adsorption ratio) and concentration of soluble and extractable Na. The effect of gypsum further increased when N was applied at the same time. The added N fertilizer increased grain yield of barley in two of the three years, the N concentration in the grain and the concentration of N and Zn in the flag leaf in all years and the Mn concentration in one year. Both gypsum and lime increased grain yield in only one yea...
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