Properties that include soil texture, toughness, coarse or fine soil. We feel that When we took out the wet soil lightly up and down with the thumb and index finger. Feelings that occurred Some clay pieces clay lumps, some rough and unrefined hand. Because particles of mineral or inorganic substances that are elements in the soil. Sizes, in both coarse and fine. Volume ratio is different in each soil. There are 12 kinds of soil, but it can be divided into groups of ground beef into 4 groups.
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