Mineral fertilization of soybeans (Glycine wightii Verdc.): I - Fertilizer trial in "cerrado" soil

In this paper are discussed the results of a factorial experiment 3³ designed to study the effect of Ca (dolomite lime), P (superphosphate) and K (potassium chlorate, on the production of perennial soybean on Dark Red Latosol. Both Ca and P alone had a highly significant effect on the production whereas K did not show any effect. There was no interaction among the three elements, but it was noticed that as Ca levels were increased it decreased the effect of P and as P levels were increased it decreased the Ca effect. In other words there was a negative relationship which was not significant.