Soil resources
.Soil environment occurs naturally. Weathering caused by the dissolution of various kinds, using a very long time, stone dissolution corrosion will be of various sizes, when mixed with litter. Dead water, air, became the soil texture
.Soil conservation need to think about as follows:
1. Reduce erosion or to prevent the collapse of soil
2. Maintain the quantity of soil nutrients to maintain fertility
. 3. Maintain organic matter and soil property
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