Distribution characteristics of soil humus fractions stable carbon isotope natural abundance (δ13C) in paddy field under long-term ridge culture. Effects of Dissolved Organic Matter Input on Soil CO2 Emission and Microbial Community Composition in a Subtropical Forest A Study on Replenishment and Decomposition of Organic Matter in and Mat-Cryic Cambisols CO2 Flux Between Vegetation and Atmosphere A near-infrared spectral index for estimating soil organic matter content. Effects of Different Mixed Organic Matter Application on the CO2 Concentration in Greenhouse and the Physiological Effects of Tomato Plants Soil C mineralization and temperature sensitivity in alpine grasslands of the Qinghai-Xizang Plateau Influences of Potamogeton crispus L.on Phosphorus Status in Lake Sediments Effects of Different Mixed Organic Matter Application on the CO2 Concentration in Greenhouse and the Physiological Effects of Tomato Plants