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1988年以耕地公里网点落点数为调查总点数,依有机质含量用最大差距法计算样本容量,然后随机抽取所需调查点作为固定监测点实地取样,对土壤有机质等7项指标进行分析化验,并对相应调查点的施肥状况进行了调查。结果表明,4县土壤有机质平均含量均在0.932—1.447％之间,汾阳县最著标高,依次为襄汾、永济、闻喜,有机质含量与1982年相比,汾阳县有显著增加,其它3县增减均未达到显准,但4县土壤速效磷含量都明显低于1982年,85％的土壤表现为缺磷,速效氮和速效磷比值均在4.2—13.49之间;10％的土壤速效钾含量偏低。
In 1988, taking the points of arable land km as the total survey points, calculating the sample size according to the organic matter content by the maximum gap method, then randomly selecting the required investigation points as the fixed monitoring points to take samples from the field, analyzing and measuring 7 indicators such as soil organic matter The fertilization status of the corresponding investigation point was investigated. The results showed that the average content of soil organic matter in the four counties was between 0.932-1.447%, Fenyang County the most elevation, followed by Xiangfen, Yongji, Wenxi, organic matter content compared with 1982, Fenyang County increased significantly , While the other three counties did not achieve any significant increase or decrease. However, available phosphorus in four counties was significantly lower than that in 1982, 85% of the soil showed phosphorus deficiency, and available nitrogen and available phosphorus ratios were between 4.2-13.49. 10 % Of soil available potassium content is low.