ABSTRACT Modern runner-type peanut cultivars have high yield potential, but little is still known about the dynamics of nutrient uptake by these cultivars and whether nutrient uptake differs between maturity groups. This study evaluated the growth, nutrient uptake, and nutrient removal of runner-type peanut cultivars with early and late maturity. The study was conducted in the field in the 2021/2022 season, in a sandy soil environment in southeastern Brazil. Treatments consisted of runner-type peanut cultivars (early and late maturity) and […]

The negative impacts of the increasing volume of wastewater and of its discharge into the environment have become a worldwide concern. This study assessed the potential impacts of using treated effluent from pig raising for cotton irrigation, to evaluate their effects on soil chemical properties, and compare the results with those under conventional management. The experiment was conducted in an experimental area of the Company for the Development of the San Francisco and Parnaíba valleys “Perímetro Irrigado Formoso”, in Bom […]

In the State of Rondônia, Brazil, soil characteristics of forest and converted pasture areas were compared (four age classes). Adjacent areas of undisturbed natural forest were also surveyed for comparison. Based on the analysis of TM/LANDSAT images obtained between 1987 and 1997, three sites were selected for soil sampling. Two of these sites belong to the class “Argissolo Vermelho-Amarelo” (PVA – Ultisol), and the other to the “Luvissolo Crômico” (TC – Alfisol). The soil samples were collected at a depth […]