Alterations in the redox potential (Eh) of soils, as observed in hydromorphic soils, cause significant alterations in the chemical and mineralogical soil characteristics and have a strong influence on the behavior of P, altering the ratio of the labile and non-labile forms. The purpose of this study was to verify the effect of conditions of low Eh on the dissolution/reversibility of non-labile P forms and solubilization/behavior of Fe and Al oxyhydroxides. Samples of 11 soils were incubated with 300 mg […]

Phosphorus dynamics and availability to plants in waterlogged soils involve complex processes which differ substantially from those verified in well drained soils. In order to study P availability to rice growing in waterlogged soils, a greenhouse pot trial was performed with nine lowland rice soil samples from Minas Gerais, Brazil. Six phosphorus rates combined with two liming rates were tested. The plants were grown for 60 days and the above ground dry weight and P concentration were determined after harvesting. […]