求翻译：银川引黄灌区的农业发展由于不合理的灌溉方式和施肥方法，导致银川引黄灌区有机碳利用率低，同时该区域河水中污染物浓度也呈升高的趋势。以镇为例，采集了不同尺度共计223个耕层土样，分析该地区土壤有机碳的空间变异及分布特征，并结合经典统计和地统计学方法对数据进行空间分布预测。结果表明：大尺度下，土壤有机碳空间变异系数较大，样本分布较离散；小尺度下的土壤有机碳空间变异系数较小，样本分布较集中，有机碳变异程度小。是什么意思？

Yinchuan in irrigated areas of agricultural development because of unreasonable irrigation and fertilization methods, resulting in Yinchuan in irrigated areas of organic carbon utilization is low, the concentration of pollutants in the river of the region also showed a rising trend. To the town, for

Yingchuan from Huang irrigation areas of agricultural development due to the unreasonable irrigation and fertilizer methods, irrigation areas in northwest China's Yellow River organic carbon utilization is low, while the river water concentration of the pollutants are also on the rise. For example,