EFEITO DA FORMA DE COLETA DO SOLO NA RECOMENDAÇÃO DA ADUBAÇÃO EM AGRICULTURA DE PRECISÃO

Abstract

The objective of this work was to evaluate the best effect of the soil sample collection method, through precision agriculture for the cultivation of sugar cane. The project was carried out in an area of ​​89.81 ha of the Denusa plant. For the determination of the sampling points, four forms of soil collections were defined, (CLELS - Collection on the line and between lines; CLEL - Collection on the line and between lines; CEL - Collection on the line between; and CL - Collection on the line) . The distribution of the points to be collected, on the other hand, was determined using precision agriculture, performed by the InCeres software, where it determined a total of 15 points for the sample area. The samples were collected with the aid of a quadricycle, where the sampling points were performed at depths of 0-20 cm. Sampling by the conventional method was also carried out in the same area, and in this case, 20 points were randomly distributed within the area. After collection, the samples were taken to the Soil Laboratory of the Instituto Federal Goiano, where they determined the analysis of macronutrients, micronutrients and textural analysis. With the data reports, they were exported to the InCeres platform, and the recommendation maps were generated. In general, the collection method (CLEL; CL and CEL) was more distant from the standard analysis, and CLELS, presented values ​​close to those of the standard analysis. For the final recommendation for liming, potassium and phosphate fertilization, the CLELS form, presented intermediate values ​​of Ca, Mg, P and K in the soil, which were close to the values ​​found in the plant standard.