Soil is a complex mixture of organic and inorganic materials that forms the upper layer of the Earth’s surface, providing a vital foundation for plant growth and other forms of life. Soils are composed of various components, including mineral particles (such as sand, silt, and clay), organic matter (such as decomposing plant and animal materials), water, and air.
Here are some MCQs on Soils:
1. Which of the following soil horizons is characterized by the accumulation of organic matter?
a. A horizon
b. B horizon
c. C horizon
d. O horizon
2. Which of the following is not a primary soil particle?
a. Sand
b. Clay
c. Silt
d. Humus
3. Which of the following is not a factor affecting soil formation?
a. Parent material
b. Climate
c. Topography
d. Vegetation
4. What is the particle size range of sand?
a. 0.002-0.05 mm
b. 0.05-2 mm
c. <0.002 mm
d. None of the above
