Evaluation of Agronomic Efficiency with Regional Source of Natural Potassium in the Brazilian Midwest

Brazil plays an important role in global food production, but faces challenges due to its dependence on imported fertilizers. To reduce this vulnerability of the agricultural sector, use natural sources such as agrominerals, also known rock dust, is gaining ground. The objective study was characterize and evaluate a new source potassium, extracted from deposit located Brazilian Midwest, through geological characterization agronomic evaluation yield tests, soil foliar potassium content. tests were conducted greenhouse with seven treatments, two types four replications, millet, soybeans beans succession residual effect product. agromineral classified nepheline syenite saprolite average K2O content 11.6%. effects promising, especially medium term. In case beans, at standard dose 60 K2O, yields clay soils 3.6 Mg ha-1 higher than KCl treatment, which obtained only 2.3 ha-1, probably absorption or leaching losses, since evaluated nature. For all crops evaluated, showed increase levels both leaves compared control group, indicating that it potential alternative gradually traditional chemical Field trials are recommended validate these benefits, taking into account more realistic environmental variations.