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农学 > 南京农业大学:《土壤学》(双语版) Sectionl Concept of soil tillage and basic manipulation
南京农业大学:《土壤学》(双语版) Sectionl Concept of soil tillage and basic manipulation
Sectionl Concept of soil tillage and basic manipulation Concept of soil tillage Tillage- The mechanical manipulation of the soil profile for any purpose. Soil tillage-oldest procedure of agriculture to manipulate the soil to improve crop production. Farmers of West Africa preparing their land for planting.
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上塑限 长如 下塑限 粘粒(%) 图128土壤塑性值与粘粒含量的关系
Table 12-2 Plasticity index of various texture soils (moisture content %) The The plastic The liquid plasticity limit limit index Clay 23~30 41~50 18~20 Clay loam 16~22 28~40 12~17 Loam 10~15 17~27 Sandy loam <16 Sand 0 0 0
Table 12-2 Plasticity index of various texture soils(moisture content %) The plastic limit The liquid limit The plasticity index Clay Clay loam Loam Sandy loam Sand 23~30 16~22 10~15 <10 0 41~50 28~40 17~27 <16 0 18~20 12~17 7~12 <7 0
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