ABSTRACT Demand for phosphate fertilizers in Brazil, combined with its reliance on external sources, highlights the need to explore alternative phosphorous (P) sources for limed cultivated soils. This study aimed to characterize and evaluate the agronomic performance of phosphates from various sources, including national sedimentary (Arraias, Bonito, and Pratápolis) and igneous deposits (Catalão and Registro) imported sedimentary sources (Algeria, Bayovar, and Morocco), and residue-recovered sources (Bonechar and effluent recovered phosphate – ERCP). Phosphates underwent mineralogical and chemical characterization, including P […]

The use of rock phosphates, combined with proper management of soil microorganisms able to solubilize phosphate, is an alternative for reducing the costs of P fertilization. However, both practices require prior assessment of the potential of the rhizospheric microbiota in solubilizing P sources with low reactivity under field conditions. The objective of this study was to evaluate the potential of soil microbes to solubilize Ca, Fe, and Al phosphates, as well as Araxá and Catalão rock phosphates, in rhizospheric and […]

The efficient use of phosphate fertilizers in soils of the tropical region is still a challenge, mainly regarding long-term soil management. Based on the cumulative response of three successive maize cultivations, alternatives of phosphorus supply combining P sources and application methods were compared in a formerly fertilized Red Argisol. Treatments arranged in a 4 x 3 + 1 factorial scheme represented by four P sources (180 kg ha-1 P2O5) as triple superphosphate – TS, magnesium termophosphate – MT, Arad reactive rock phosphate – RP, and Araxá […]