Clayey soil absorbs the highest amount of water because of its higher water retention capacity. some absorb more water while other absorbs less water. Under physical classification soil water is grouped into three on the basis of retention: gravitational, capillary and hygroscopic water. Related Questions. Water retention capacity of the clayey soil is quite high. The process by which huge rocks are broken down into small particles by the action of sun’s heat, wind, rain and flowing river water, etc, is called weathering. A healthy, thriving garden starts with good soil, one that is best-suited for the type … Which Soil Retains Water Best: Clay, Loam, Silt or Sand?. Different types of soil can absorb water to a different extent, i.e. Answer. When we talk about the percentage of water absorbed by the soil, it means the mass of water absorbed by 100 g of soil. (5) Soil is used to make earthenware or pottery (such as matkas, surahis, etc. Soil plays an important role in the existence of life on earth. Also, clayey soil is rich in humus and is very fertile. ), crockery (cups and plates), toys and statues, etc. Water Retention The ability of soil to hold water is called water retention. Download Soil Class 7 CBSE Notes on BYJU’S. Soil Class 7 MCQs Questions with Answers. Soil profile can be defined as a section through various layers of soil. Different types of soil are found are found at different places. Hence, clayey soil useful for crops (such as wheat). RELATED ASSESSMENTS. Subclass w is made up of soils for which excess water is the dominant hazard or limitation affecting their use. Water retention ability, also called soil water retention rate, is a measure of how much water a particular type of soil or grow medium can retain. Your soil’s water retention ability will depend on the type of soil in question, as well as the nature of any amendments you might have added to the soil. The term water retention signifies an abnormal accumulation of fluid in the circulatory system or within the tissues or cavities of the body. (a) Earthquakes or volcanic eruptions (b) Weathering of rocks (c) Addition of humus (d) All are involved in the formation of soil. On the other hand, sandy soil absorbs the least amount of water because of its lower water retention capacity. ASK A QUESTION . NCERT Solutions for Class 7 Science Chapter 9– Soil – Definition of the Keywords-Clayey, Humus, Loamy, Percolation, Moisture, Sandy and Water retention. Answer: (d) All are involved in the formation of soil The organic matter formed by the dec omposition of dead plants and … Choose the correct answer: Question 1. Poor soil drainage, wetness, a high water table, and overflow are the factors that affect soils in this subclass.. 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