Physical Geography GK Quiz-24

Physical Geography GK Quiz-24

Physical Geography Multiple Choice Questions (MCQs) Quiz for State and UPSC Civil Services Examinations. Objective Questions on Physical Geography for competitive examinations.

    41. In which region is Terrace farming done?

    (1) Dry regions
    (2) Slope of hills
    (3) Mountain tops
    (4) Rooftops
    Answer:
    41. (2) Terrace farming is the practice of cutting flat areas out of a hilly or mountainous landscape in order to grow crops. It involves growing crops on sides of hills or mountains by planting on graduated terraces built into the slope. On each level, various crops are planted.

    42. Alluvial soils are rich soil for crop cultivation but are poor in

    (1) humus
    (2) nitrogen and humus
    (3) organic material
    (4) inorganic material
    Answer:
    42. (2) Alluvial soils are fertile soils composed of sediments deposited by rivers and the waves. However, they are usually deficient in nitrogen and humus. Nitrogen deficiency is the main limiting factor in crop production in all the alluvial soils except the calcareous and saline alkali alluvial soils. With suitable irrigation, fertilizers and proper agricultural practices, alluvial soils are generally very fertile. 

    43. Bamboo is classified as

    (1) Tree 
    (2) Grass
    (3) Shrub 
    (4) Herb
    Answer:
    43. (2) Bambooare a subfamily (Bambusoideae) of flowering perennial evergreen plants in the grass family Poaceae.Giant bamboos are the largest members of the grass family.The woody bamboos share characteristics with herbaceous (non-woody) grasses, notably leaf blades that have a distinctive internal organization of the tissues and which are basally narrowed to form a stalk-like connection with the leaf sheath.

    44. The transfer of minerals from top soil to subsoil through soil-water is called?

    (1) Percolation
    (2) Conduction
    (3) Leaching
    (4) Transpiration
    Answer:
    44. (3) Leaching refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. As water from rain, flooding, or other sources seeps into the ground, it can dissolve chemicals and carry them into the underground water supply. Mineral nutrients lost from the soil system become unavailable for plant uptake.

    45. Black soil is also known by which of the following name ?

    (1) Khadar Soil
    (2) Bangar Soil
    (3) Alluivial Soil
    (4) Regur soil
    Answer:
    45. (4) Black soils are often referred to as regur but are popularly known as “black cotton soils,” since cotton has been the most common traditional crop in areas where they are found. Black soils are derivatives of trap lava and are spread mostly across interior Gujarat, Maharashtra, Karnataka, and Madhya Pradesh on the Deccan lava plateau and the Malwa Plateau.

    46. Salination of soil is caused by

    (1) pesticides
    (2) soil erosion
    (3) excess irrigation
    (4) crop rotation
    Answer:
    46. (3) Soil salinity is the salt content in the soil; the process of increasing the salt content is known as salinization. Excess irrigation leads to increase in soli salinity since water is absorbed by plants and salts are left behind in the soil and eventually begin to accumulate. Salination from irrigation water is also greatly increased by poor drainage and use of saline water for irrigating agricultural crops.

    47. Which one of the following is the indirect use of forests ?

    (1) Medicinal plants
    (2) Checking soil erosion
    (3) Building material
    (4) Grazing
    Answer:
    47. (2) Some of the indirect uses of forests include: prevention and control of soil erosion, flood control, checks on spread of deserts, increase of soil fertility, and effect on climate. Forests play a significant role in the prevention and control of soil erosion by water and wind. The destruction of forest cover leads to increased runoff of rain water and its diminished seepage in soil.

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