The soil is usually a problem or not suitable for cultivation as low soil fertility, the structure of the soil is poor, dense, do not absorb water
.The microorganisms in soil less because of the inappropriate in which agriculture is the improper soil unsuitable towards planting the plants or damaged wood such as I. Sandy soil, laterite, acid, alkali saline soil.In the field of chemical, physical and biological need to improve, and seek to benefit the
.In use for cultivation.
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