The features of true soil are minerals, bacteria and organic materials, air and moisture.
1. Minerals, which come from rock, become part of the soil when the rock is broken down into smaller particles called sand, silt or clay. Many of these minerals for instance calcium, phosphorus and potassium provide nutrients to plants.
2. When organic materials that is plants and animals, die they are decomposed by bacteria in the soil. As bacteria breakdown these organic materials, huus is formed. Humus provides nutrients and moisture for plants and gives the soil its dark colour.
3. Plants need air around their roots. Humus helps produce the air in the soil because the loose, decaying materials allow for many air pockets. Insects, worms and small animals that tunnel through the soil also provide air spaces.
4. Moisture that is water, dissolves nutrients in the soil and is taken up by plants through their roots. Moisture is necessary for plant survival and for the chemical and physical processes that weather rock and decay organic materials.
eddynightsy answered the question on April 16, 2018 at 13:23
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