We present the study of environmental gradients such as altitudinal gradient, slope class, and aspect on the organic carbon stock of Wacho forest soil in south western Ethiopia. A systematic random sampling technique was used to collect the soil samples. The soil organic carbon stock was determined by a standardized mathematical equation. A one-way analysis of variance was used to test the effect of environmental gradients such as altitudinal gradient, slope class, and aspect on organic carbon stock of Wacho forest soil. Descriptive statistics were used to calculate the mean and standard deviation of the organic carbon stock of Wacho forest soil. The organic carbon stock of Wacho forest soil varied from 94.58 ± 9.6 t/ha (15.1–20% slope class) to 130 ± 14 t/ha (5–10% slope class). The organic carbon stock of Wacho forest soil ranged from 92 to 140 t/ha in the west and east, respectively. Both slope class and aspect had a statistically significant effect on organic carbon stock of Wacho forest soil.

我们对埃塞俄比亚西南部瓦乔森林土壤有机碳储量的环境梯度（如海拔梯度、坡度和坡向）进行了研究。采用系统随机抽样技术来收集土壤样品。土壤有机碳储量通过标准化数学方程确定。采用单因素方差分析检验海拔梯度、坡度、坡向等环境梯度对瓦乔森林土壤有机碳储量的影响。采用描述性统计方法计算瓦乔森林土壤有机碳储量的平均值和标准差。Wacho森林土壤的有机碳储量从94.58±9.6吨/公顷（15.1-20%坡度等级）到130±14吨/公顷（5-10%坡度等级）不等。西部和东部瓦乔森林土壤有机碳储量分别为92～140吨/公顷。坡度等级和坡向对瓦乔森林土壤有机碳储量具有统计显着影响。