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三、沟干泥。这种土干得较快,故名。主要分布在古“岗身”一带,占全市土壤总面积1/8强。成土历史较久,经过长期风化、耕作,粘化作用较深,质地粘重(仅次于青紫泥),土体密实,水分不易渗入,地面径流大,雨过天晴易干燥,也叫“时辰地”。耕性不良,吸收性强,保肥而难耕,群众称为“伤人工、省垩用”(即费工、省肥)。潜在养分较高,有机质含量2.3～3.4％,全氮量
Third, ditch dry mud. This soil quickly, hence the name. Mainly distributed in the ancient “Gang” area, accounting for the city’s total area of ?? soil 1/8 strong. It has a long history of soil formation. After long-term weathering, deep tillage and viscidity, the texture is heavy (second only to purple purplish mud), the soil is dense, moisture is not easy to penetrate, the ground runoff is large, “Time and place.” Poor tillage, strong absorption, fertility and hard farming, the masses called “wounding, chalking” (that is, labor, fertilizer). Higher potential nutrients, organic matter content of 2.3 to 3.4%, total nitrogen content