a process of a plow and type of green manure crops, there is an increasing harvestable stage objects in the ground, the physical properties of water, increased accumulation in the space of the soil (Wirot,2531) eagle, an object is the weld beads of soil particles, Island, it is a good structure and stability, land has a gap that is suitable for the growth of the plant, there is a growth of plant roots to bore deep. The gas exchange(Hamblin,1985 ).
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