Grade-8, SST, Natural Resources - Land, Soil and Water
Natural Resources - Land, Soil and Water 1. Fill in the blanks with appropriate words. (a) Plateaus are also called tablelands . (b) The highest density of population is found in the plains . (c) Leaching is the process where minerals in the soil are dissolved by rainwater and drained off. (d) Black cotton soil is also called regur . (e) Disposal of sewage and industrial waste are major sources of water pollution. 2. Choose the correct answer. (a) One of these is an alluvial soil: (1) khadar. (ii) red soil. (iii) laterite. (iv) regur. Answer- (i) khadar - Alluvial soils are formed from deposits of silt and clay carried by rivers. Khadar is a type of alluvial soil found in newer river deposits. (b) The black lava soil of the Deccan Plateau is best for the cultivation of (i) rice. (ii) tea. (ii) cotton. (iv) wheat. Answer- (iii) cotton - Black lava soil, also called regur, is known for its high iron content and is ideal for cotton c