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Alternative use of super heavy harrow plow for soil acidity liming and black oat production

Maximum liming efficiency depends not only on the quality of the corrective material but also on appropriate incorporation according to depth and homogeneity.Based on this, this work aimed to evaluate the effect of limestone incorporation ways on the production of black oat and on the correction of acidity in soil profile.An experiment was carried out in a Typic Acrustox loamy texture, in the area of the Triângulo Mineiro in Uberlândia (MG) from May 1995 to February 1996.The experiment was arranged in a randomized design subdivided plots, with the main plots organized in blocks with three repetitions.The plots were constituted by the following ways of limestone incorporation: GP+GN harrow heavy plow (14x34"); A+GNP+GN traditional way, with plowing (4x26") and harrow leveling (60x22"); GSP+GN super heavy harrow plow (14x34"); in the subplots, for the dolomitic limestone doses as follows: limestone D0 =zero; D1 = the dose to elevate base saturation (V) = 70%; D2 = the dose to elevate V = 100%, that corresponded to 0; 6.0 and 9.2tha-1, respectively.The way limestone is incorporated affects liming efficiency in the soil profile.Heavy harrowing was not adapted for limestone incorporation.The disk plow combined with the harrowing had a satisfactory performance, reaching 0.20m depth.The super heavy harrowing provides larger uniformity and incorporation depth, with neutralization of soil acidity up to 0.30m depth.

incorporation ways; liming; depth; basis saturation


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