PHOSPHORUS AND LIME LEVELS FOR PEANUTS AND COMMON BEANS AND THE RESIDUAL EFFECT IN RICE IN CERRADO SOILS OF THE GOIÁS STATE

Abstract

In this study, the results of the field experiments of phosphorus and lime levels on peanuts (Arachis hypogea L.) and dry beans (Phasealus vulgaris L.) after crotalaria juncea and of the subsequent rice crop, at five locations in the State of Goiás, are presented. There was a linear effect of phosphorus in two experiments on peanuts and in one experiment on dry beans. In the experiments testing residual effect on rice, there was a linear effect of phosphorus in two experiments and a linear effect of lime and interaction of phosphorus and lime in a third. Even though there was a severe drought, reasonable yields were reached. The results showed peanuts at 1.5, dry beans at 1.9, and rice at 2.3 times the average yields for Brazil in 1969. The profits were determined along with the relationship between the increase in value of the crop and the cost of producing the increase. It was determined that the cost of the treatments (Fertilizer and lime), which produced this increase, was justified at three of the five locations.