ABSTRACT Podzols are highly sandy soils, in which elements, such as potassium, needed by crops, are easily leached. Studies have indicated that biochar can contribute to increasing cation exchange capacity of the soil, which can improve the retention of bases. This study aimed to evaluate the effect of the poultry litter biochar combined or not with increasing doses of KCl, on leaching and soil base content, on the production of green manure biomass, and on the distribution of K in […]

ABSTRACT: Runoff in agricultural areas with intensive application of pig slurry can transport significant amounts of nutrients. This study evaluates the effects of different pig slurry (PS) application rates (0, 50, 100, and 200 m3 ha-1) on nutrient loss through runoff during soybean cultivation under no-tillage. It was conducted at two sites in southern Brazil, one on an Alfisol (27° 43′ south and 50° 3′ west) and one on an Inceptisol (27° 47′ south and 50° 18′ west). The PS […]

Para a produção de mudas em substratos, é intenso o uso de fertilizante e de irrigação, o que pode gerar perdas elevadas de nutrientes. O P é muito utilizado na preparação de substratos, mas estudos modelando suas perdas ainda são escassos. Este trabalho objetivou avaliar atributos químicos do lixiviado na fase de enraizamento de estacas de cacaueiro cultivadas sob irrigação intermitente em diferentes substratos e doses de P. O delineamento experimental foi em blocos casualizados com três repetições, em esquema […]