Abstract:This study analyzed soil organic carbon content (SOC) in major types of grassland along the middle range of Helan mountain in Alex,Inner Mongolia. Factors affecting carbon distribution such as annual precipitation, temperature, plant cover and productivity, soil water content,<0.05mm particle content and soil pH were also monitored. Results indicate that soil organic carbon content declined with a decrease in Altitude according to the following order: alpine meadow >mountainous desert steppe>steppe desert>G...