Abstract

BONNIN, Juan Jose et al. Analysis of the spatial variability of the yield of soybean crop in a property of the District of Villeta - Central Department. Investig. Agrar. [online]. 2017, vol.19, n.1, pp.16-27. ISSN 2305-0683.  https://doi.org/10.18004/investig.agrar.2017.junio.16-27.

The aim of the research was to create a map of the spatial variability of the yield of soybean, through crop productivity data, in order to assess the economic viability of the crop. The work was conducted during the 2014/2015 harvest on the farm Querencia (Villeta-Central). The soybean variety used was Syn 1161RR. The implementation of the crop was in an area of 21.03 ha, in a system of direct seeding, where fertilization, weed control, pests and diseases were carried out in accordance with the recommendations and requirements of the crop. To obtain the yield, productivity was determined first, through mesh sampling, to provide the greatest possible number of points for the characterization of the area. The location and geographical distribution of the sampling points were performed with a Trimble GPS-receiver. An exploratory analysis and geostatistical analysis of the data were carried out in order to determine the spatial dependence and generation of maps. The elaboration of a profitability map, from productivity data, was adequate, allowing observing the spatial variability of profit, when compared to the average for the area, which allowed obtaining precise information of the economic viability of cultivation under these conditions. The average productivity was 3.753.33 kg ha-1, higher than the national average, where 71.95% of the area presented a yield of 2.403.11 to 4267.17 kg ha-1, with a profit of 409.93 to 969.15 US$ ha-1.

Keywords : Glycine max (L.); precision agriculture; production cost..

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