The application of fertilizers is essential to supply the demands of eucalyptus, mainly in Cerrado soils. In addition to NPK fertilization, some species of eucalyptus are demanding in some micronutrients such as B for its development. Therefore, studies on the amounts of macro and micronutrients are important to determine the optimal amounts of these nutrients and economically viable in forest species. The objective is to compare the effect of sources of boron with high and low solubility in the Eucalyptus spp crop, besides application on leaf using boric acid. The experiment is being conducted on the farm Renascença, fund managed by Cargill Agricola S / A, located in Selvíria - MS. The experimental design is a randomized block with six treatments and five replications in a factorial 3 x 2, constituted by: 0 kg ha-1 of boron, 1 kg ha-1 of boron using boric acid as a source (high solubility, 17%) and 1 kg ha-1 of boron using borogran as source (low solubility, 10% ), which were applied in the furrow, besides absence or presence of boric acid at leaf. All treatments were fertilized with NPK formulation. The experiment is being conducted since January 2012 when it was performed the implantation of the crop planting and fertilization. Will be done the following assessments: leaf analysis, plant height, diameter at 30 cm or at breast height, total volume of wood with bark and mean annual increment.
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