MCQ Questions for Class 7 Science: Ch 9 Soils 1. They are coarse grained in the upper slopes. Learn more about different types of soil of India categorised by the Indian Council of Agricultural Research (ICAR.) Soil texture is the "feel" of the soil when a moist quantity is manipulated between thumb and forefinger. The entire northern plains are made of alluvial soil. The old alluvial soils called Bangar found near the river valleys are coarser and contain more pieces of rocks called Kanker. Gullies: The running water cuts through the clayey soils and makes deep channels called gullies. In villages people own lands whereas in urban areas people own plots, houses and other properties. Alluvial Soils. Answer. Due to dry climate, high temperature evaporation is faster and the soil lacks humus & moisture. The laterite soil develops under tropical and subtropical climate with the alternate wet and dry season. In fact, the entire northern plains are made of alluvial soil. The land becomes unfit for cultivation and is known as bad land. Wind blows loose soil off flat or sloping land known as wind erosion. Afforestation and proper management of grazing. In recent years, industrial effluents as waste have become a major source of land and water pollution in many parts of the country. Soil - Definition • Soil is the uppermost layered of the earth's crust which is loose, fragmented and fine. v). The soils of Peninsular India are formed by the decomposition of rocks in situ, i.e. This type of soil is found mostly in Southern states, Western Ghats region of Maharashtra, Odisha, some parts of West Bengal and North-east regions. Parent rock or bedrock, climate, vegetation and other forms of life and time are important factors in the formation of soil. The classification of soils is based on origin, colour, composition, texture and location. Laterite soils are suitable for cultivation with adequate doses of manures and fertilizers. They are generally sandy in texture and saline in nature. This soil is very useful for growing tea and coffee. Non-Renewable Resources occur over a very long geological time. Although initial soil survey work in Louisiana is complete, the inventory of soils in Louisiana is dynamic and subject to temporal change. The classification of soils has pro-found effects on a variety of soil properties from land use to agro-nomic productivity. Human beings themselves are essential components of resources. In the field, there are several ways by which you can find the textural class of the fine-earth portion of a particular soil sample. Write a short note on alluvial soil. Resources have been used by human beings indiscriminately and this has led to the following major problems. Resources can contribute to development only when they are accompanied by appropriate technological development and institutional changes. The renewable resource may further be divided into continuous or flow. National Resources are owned by a nation or country. Alluvial soil is considered to be a most fertile soil which forms the largest and the most important soil group of India. is a reserve which can be used in the future. 2. We build top of the edge software solutions to improve our clients potential Materials in the environment which have the potential to satisfy human needs but human beings do not have the appropriate technology to access these, are called Stock. Spread: Karnataka, Kerala, Tamil Nadu, Madhya Pradesh, and the hilly areas of Orissa and Assam. The resources which can be renewed or reproduced by physical, chemical or mechanical processes are known as Renewable or Replenishable Resources. Ideal Crop: Cotton hence another name black cotton soil. India has land under a variety of relief features, namely; mountains, plateaus, plains and islands as shown below: Land resources are used for the following purposes: The data below represents the land use pattern in India. Soil Types of India – Alluvial Soils – Black Soils – Characteristics, Chemical properties, Distribution, Divisions: Bhabar, Terai, Bhangar, Khadar. Due to its high fertility, regions of alluvial soils are intensively cultivated and densely populated. The soil erosion is caused due to human activities like deforestation, over-grazing, construction and mining etc. The khadar soils are found in the low areas of the valley, bottom of a valley which are flooded every year. Lateritic soils are acidic (pH<6.0) in nature and generally deficient in plant nutrients. Or India has approximately 89000 species of animals, 1200 of birds and 2500 species of fishes. Resource planning is a complex process which involves: (i) Identification and inventory of resources across the regions of the country. Black soil is nutrients rich and contains calcium carbonate, magnesium, potash and lime. 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