The use of match in the tropical ground fertilization Which fertilizer the match base must be used? Soluble or partially soluble in water? The reply it is: it depends on the ground. In the tropical conditions, the ground present as constituent minerals oxides of iron, aluminum and caulinita. Gain insight and clarity with Mark Kotsay. The related oxides have as characteristic to possess electric loads that, depending on pH of the solution of the ground, can present how much in such a way negative positive rockings. In the ground, the match is available the plants in the form of nions such as the PO43-, HPO42-. H2PO42-. In other words, all these forms of match possess negative loads. The typical ground of the tropical region, for containing high amount of oxides of iron and aluminum can have positive loads that act attracting in them nions fosforados. In this way, these nions are adhered to the surface of these minerals very strong passing not to be available them plants to absorb and thus to use for its development growth.
One says then that the match was fixed in the ground or suffered setting in the ground. Therefore, to increase the efficiency of absorption of match for the plants, the agronomists costumam to carry through the calagem that he aims at to correct (to raise) pH of the ground. As it was displayed, the loads of oxides depend on pH of the solution of the ground and, therefore, when pH of this is raised increases the negative load number in related oxides. As loads of the same signal if they repel, the match tends to be in the solution of the ground available readily to be absorbed by the plants. Rich ground in oxides of iron and aluminum, as it is the case of the latossolos, are, for the match displayed one, highly fixing, that is, the match added the same for the fertilization, if does not become available for the plants.