Agricultura de precisão simplificada para pequenas propriedades.

Abstract

The present work applied precision agriculture techniques in a small farmer where an area of 10,9 hectares was managed with precision agriculture tools appropriate to the socioeconomic farmer profile. In order to reach this general objective it was proposed the following specific objectives: a) to identify the horizontal spatial variability of the soil attributes through fertility maps; b) to apply fertilizers in different doses for each handling zones; c) to measure soil resistance to penetration and wheat leaf chlorophyll; d) to make yield map; e) to take note of production costs and to elaborate liquid revenue map for wheat culture. As some results, it was found horizontal spatial variability in soil for phosphorus and potassium and chlorophyll in wheat leaf. It make us try to apply different quantities of fertilizer using seeding and centrifugal broadcaster spreaders without automatic variable rate. In this area, the average of wheat yield was 2427 kg.ha-1, changing from 1915 to 3151 kg.ha-1. Considering the relationship between productivity and production costs, the liquid revenue varied from R$ 14,00 to 358,00 per hectare and had average of R$ 152,00 per ha. The individual crossing among digital models evidenced correlation of 48,6% between productivity and liquid revenue. In general way, precision agriculture tools can help the little farmer to know better and more precisely each part of area destined to agricultural activity