The experiment was carried out in greenhouse at the Soil Science Departament – Federal University of Lavras, Minas Gerais, Brazil. The objective was to study the effects of different CaSO4/CaCO3 ratios on the movement of nutrients in soil and cotton growth. The treatments consisted of four CaSO4/CaCO3 percentage ratios (100/0, 75/25, 50/50, 25/75 and 0/100), in an equivalent basis. A control treatment, without application of either CaSO4 or CaCO3, was also established. Substantial calcium and sulfate movement downwards was observed […]

In two field experiments with cotton plants cv IAC 20, conducted in soils infested with nematodes, in the State of São Paulo (Brazil), it was observed that the parasite symptoms occurred in accordance with rates of urea applied in side-dressing (0, 25, 50 and 75 kg ha-1 of N). So, it was made a rating of symptoms in each experimental plot, giving grades to plants according to the intensity of the attack: grade 1, to plants with normal development and […]