Soil is a natural thewatthu, which occurs on the surface world as objects that support the growth and shape of the tree. The soil is composed of minerals and อินทรีย objects and characteristics of different layers. Soil conservation means to take advantage of the land wisely, need to take into consideration the following story:
1. Reduce erosion or soil erosion prevention
2. Maintain the quantity of nutrients in the soil, keep fertility up
. 3. maintain a level soil properties, objects, and อินทรีย in all aspects because of improved returns from lost, it will take a long time and charge higher than protected by conservation methods are many.
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