Land use Very suitable  land classification.

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Presentation transcript:

Land use Very suitable  land classification. Fairly suitable  according to suitability factor. Not suitable  a particular crop. Land capability classification. The type of soil. Depth of soil. Texture. Land slope. Past erosion on the land.

Soil erosion by wind Wind erosion is more frequent when the mean annual rainfall is low. Major factor that affects soil erosion by wind are: climate Soil characteristics Vegetation climate: Rainfall affects soil moisture. Temperature humidity. Wind.

Wind characteristics that affects soil erosion. Duration. Turbulent of the wind (velocity). For any given soil condition the amount the amount of soil which will be blown depends on two factors: The wind velocity. The roughness of the soil surface. Soil: factors  soil texture.  density of soil particle and density of soil mass.  organic matter content.  soil moisture.

Vegetation:  height of vegetation.  density of cover.  types of vegetation.  seasonal distribution of vegetation. Types of soil movement by wind Suspension. Saltation. Surface. creep

These three distinct types of movement usually simultaneously These three distinct types of movement usually simultaneously. suspension  particle were carried about 1m above on the surface.( i.e. above 3ft) saltation  This is caused by the pressure of the wind on the soil particle and its collision with other particles. surface creep  This movement is mostly pronounced on the surface of the soil.