1. Extent to which pH and topographic factors control soil organic carbon level in dry farming cropland soils of the mountainous region of Southwest China
- Author
-
Teng-Bing He, Chenglong Tu, Pete Smith, Ya Luo, and Xiao-Hui Lu
- Subjects
Hydrology ,Total organic carbon ,Soil organic matter ,Soil chemistry ,04 agricultural and veterinary sciences ,Soil carbon ,010501 environmental sciences ,01 natural sciences ,Agricultural land ,Soil pH ,Soil water ,otorhinolaryngologic diseases ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Common spatial pattern ,Environmental science ,0105 earth and related environmental sciences ,Earth-Surface Processes - Abstract
Soil organic carbon (SOC) in agricultural land is influenced greatly by indeterminate human activity, making it difficult to understand the spatial pattern of SOC. Soil pH and topographic conditions are key indices in the Chinese Soil Genetic Classification System (CSGCS) and manage some critical factors that control the dynamics of SOC either directly or indirectly. To identify the extent to which pH and topographic factors control SOC levels in dry farming cropland soils of the mountainous region of Southwest China, we compared the differences along topographic gradients, and analysed the contribution of different factors in determining SOC status using analysis of variance (ANOVA) and linear regression. Our results indicated the SOC levels ranged from 10.46 g•kg− 1 to 37.60 g•kg− 1 and were significantly correlated with soil pH, landscape position, slope and elevation (p
- Published
- 2018
- Full Text
- View/download PDF