Análise da produtividade da cultura da soja (Glycine Max(L.) Merril) em função da aplicação localizada de fósforo e potássio.

Abstract

The study carried through in this work was developed in a 1,74 ha area, being the ground classified as Typic Haplorthox, planted with soybean in a no-tillage system, located in the city of Cascavel - Paraná, divided in geo-refereed parcels, monitored during the period of 1999 the 2002. Phosphorus and potassium had been evaluated in each parcel the chemical attributes gifts in the ground and the productivity of the culture. The gotten data had been interpolated, generating the maps of availability and, consequently, of located application of these nutrients and also maps of productivity. The development of the availability maps ideal tools for the precision Agriculture, being possible, the determination of the accurate amount of the application of these nutrients to each point had revealed thus. An increase in the productivity occurred in the year of 2000, as consequence of the correct application of the nutrients. The reduction of the occurred productivity in the year of 2002 can be caused by the lesser amount applied of allied potassium the atypical climatic factors during the development of the culture