Zinc solubility in fertilizers (zinc sulfate, zinc oxide, metallic zinc and four FTE) was determined using water, 20 g L-1 citric acid, neutral ammonium citrate (1 + 9) and DTPA as extractant solutions, and the correlation with the availability of this micronutrient for rice and corn plants established. Zinc was most accessible for the plants in sulfate form, followed by oxide, while FTE presented the lowest availability. Neutral ammonium citrate (1 + 9), at a ratio of 1:100 and after […]

The aim of this work was to study the influence of residues of five Sorghum bicolor L. (cv CMS XS 376, CMS XS 365, BR 304, BR 700 and CMS XS 755) on soybean growth. These residues were harvested in three different stages during the sorghum cycle (blooming, milking and physiological maturity) and either spread on the soil surface or totally incorporated in soil, in the proportion of 4 g kg-1 of dry matter in the soil (a Dark Red […]