Nutrition and Yield of Corn As a Function of Surface Application of Lime and Gypsum.

In no tillage system the absence of soil mobilization consequently decreases plant residues accumulation and places fertilizers on surface, affecting the acidification process.Thus, it is necessary input application, especially materials for acidity correction.Improvements on physical, chemical and biological soil conditions occur with lime application that favor the production of biomass, increasing the quantity and quality of soil organic matter. The work was developed in Lageado Experimental Farm (Botucatu-SP),continuing a research project that has been conducted since the 2002/03 crop year, in order to evaluate the effect surface application of lime and gypsum in corn nutrition and productivity in a region with a dry winter. The sowing of summer crop was in November of 2010. The experimental design is a randomized blocks in split plots with four replications.The plots consist of four levels of lime (0, 1000, 2000 and 4000 kg ha-1) and the subplots of two layers of gypsum (0 and 2100 kg ha-1), applied in October 2010. The application of gypsum did not significantly affect any of the parameters studied. Moreover, the liming increased plant uptake of macronutrients, with significant effects on yield componets and grain yields.