Soil carbon stocks are the result of interaction of factors that determine their formation and decomposition. This study aimed to quantify the total organic recovery in various C pools under the following different land uses of an Ultisol: secondary forest, rubber tree plantation, pasture, and citrus plantation. The soil was sampled at depths of 0 to 10 cm and 10 to 20 cm and the following characteristics were determined: total organic carbon (TOC), total nitrogen (TN), fulvic acid fraction-C (FA), humic acid […]

Simulation models are essential instruments to understand soil organic matter dynamics and the turnover of its pools in tropical soils. The objectives of this study were: (a) simulate the effects of maize production systems under organic and mineral fertilization on soil organic matter dynamics of an Ultisol using the Century model; (b) to compare total carbon (TOC) and total nitrogen stocks (TN) and the carbon pools (C) measured in the laboratory and estimated by the Century model for the surface […]