Estoques de carbono orgânico do solo em cafezais sob diferentes sistemas de controle de plantas invasoras Soil organic carbon stocks in coffee plantations under different weed control systems

Soil organic carbon (SOC) is an important indicator of soil quality, as its levels and stocks can change by soil preparation. This study aimed to evaluate SOC stocks on a clayey Oxisol cultivated with coffee and subject to different weed control systems in southern Minas Gerais, Brazil. The experimental design was in randomized blocks, and weed control systems were: no weeding, manual weeding, pre-emergence herbicide, post-emergence herbicide, rotary tiller, rotary mowers and disk harrow. Undisturbed soil samples were collected at two positions in the coffee plantation (tire tracks and planting line), at depths 1