when soil is dissolved in water and mixed a layer of soil floats on the surface of water. what does this layer consist of?
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When water is added to soil, it can replace the oxygen that is naturally in the soil, and make the soil darker. This means wetter soil will have less oxygen compared with drier soil. When enough water is added, soil can become saturated and the water will start to form a layer on top of it
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When soil is mixed in the water after some time a layer of soil floats in the water. this layer consists of humus. Humus is nonliving, finely divided organic matter in soil, derived from microbial decomposition of plant and animal substances. Humus, which ranges in colour from brown to black, consists of about 60 percent carbon, 6 percent nitrogen, and smaller amounts of phosphorus and sulfur.
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