土壤性状深受地区性的影响而表现极大的差异,即使同一生产队,村南、村北的土壤也可能是不同的。因此,“为了改土、用土,先要识土、辨土”,进行土壤普查,以便摸清土壤资源,合理改良利用,发挥其增产潜力。一、土壤普查的内容土壤普查内容,应根据当时、当地的具体条件和需要来确定。通常以农场、社队为单位,地段或田块为基础,进行土壤类型的划分和肥力等级的评价,找出土壤的障碍因素 Soil characteristics are greatly affected by the region and show a great difference, even if the same production team, the soil of the village south, village north may also be different. Therefore, “in order to soil, soil, we must first recognize soil, identify soil”, carry out soil census, in order to find out the soil resources, rationalize the utilization, give full play to their potential yield. First, the contents of soil census Soil census content should be based on the prevailing local conditions and needs to determine. Usually farm, social teams as a unit, lots or plots as the basis for soil type classification and fertility rating to identify barriers to soil