Knowledge of soil classification helps predict soil behavior. (i) This is the most widely spread and important soil of India. Importance (Functions) of Soils Soils are essential for life, in the sense that they provide the medium for plant growth, habitat for many insects and other organisms, act as a filtration system for surface water, carbon store, and maintenance of atmospheric gases. The following are five important characteristics of Black soil: It is fine textured and clayey in nature. Soil Classification Systems 189 A.1.2 The ASTM System An advantage of the Unified system is that it can easily be extended to include more soil groups, giving a finer degree of classification if required. The classification system does not eliminate the need for detailed soil investigation and testing. Importance of Soil Classification: A soil classification system is essentially to faciliate communication between different groups of engineers, widely separated. Related Questions to study. The classifiaction based on grain size or texture. Changes in water content of soil are accompanied by change in total volume of soil (figure 3.10). View Answer. Plants grow in the soil. It is black in colour since it is formed from weathered lava rocks. Soil pH and plant growth: Most of the plants grow best when the pH of the soil is close to 7. County extension agents provide soil survey maps of local soil classifications to help farmers make decisions about crops to grow in particular areas. It also supports different types of living organisms on earth. Classification of Indian Soil - Read about the Types of Soil in India. Hence, log scale is used. CBSE 2017 Class 10 Social Science Sample Question Paper 5 & 6. Soil is one of the important components of the sustainability of an ecosystem because it is the vitally important natural medium for the growth of vegetation. So, it is impossible to cover this range with normal scale. Characteristics of soils like Alluvial Soil, Black Soil given in the article. Soil particles sizes ranges from few micrometers to centimeters range( 10^(-6) to 10^(-2) m ). If the soil is too acidic or basic, the plants grow badly or do not grow at all.The soil pH is also affected by the use of chemical fertilisers in the field.Chemicals can be added to soil to adjust its pH and make it suitable for growing plants. Learn more about different types of soil of India categorised by the Indian Council of Agricultural Research (ICAR.) And also getting a good curve is possible only with log scale. Answer: Soil is the most important renewable natural resource. Importance of Soil - Chapter 9 – Soil - NCERT Science Class 7th Practice important Questions. At very high water content, fine grained soils behave like fluids. Give the importance of soil. Soil behavior helps predict soil performance for growing agricultural crops. 81 Qs. 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