Phosphorus has low mobility in the soil. Thus, its concentration near the granules of phosphate fertilizers in the soil is very high, which may affect P availability and the soil chemical composition in these regions. This study was carried out to evaluate the soil chemical composition near the granules of calcium or ammonium phosphates and P mobility in two Brazilian acid soils. The experiment was carried out in 2009 and treatments consisted of a combination of triple superphosphate (TSP) or […]

In recently fertilized soils, plants uptake nutrients mainly from around the granules, but little is known about the chemical composition of these zones. This study aimed to evaluate the K concentration gradient as well as the electrolyte concentration around KCl granules applied at different rates to five soils varying in clay (95 to 569 g kg-1) and organic matter (13 to 54 g kg-1) contents. Treatments consisted of four KCl rates (0, 50, 100, and 200 kg ha-1 K2O). These quantities were obtained by simulating a […]

Traffic of heavy machinery during forest harvesting causes soil compaction and alters the nutrient availability for plants, affects root growth, and the mass flow and diffusion processes, thus representing a problem for forest management. The objective of this study was to evaluate the influence of soil compaction and potassium application on growth and K nutrition of Eucalyptus camaldulensis. The study was carried out in pots under greenhouse conditions, using a completely randomized design with treatments in a 3 x 4 […]