Advertisements
Advertisements
प्रश्न
Top-soil contains the following
विकल्प
Humus and living organisms only
Humus and soil particles only
Humus, living organisms and plants
Humus, living organisms and soil particles.
Advertisements
उत्तर
Humus, living organisms and soil particles.
Explanation:
Topsoil is the soil's top and outermost layer. which is typically 2 to 8 inches thick. It is often black in colour because of humus. which is partially decaying organic matter, soil particles and live creatures such as soil bacteria, among other things.
APPEARS IN
संबंधित प्रश्न
What are the methods of preventing or reducing soil erosion?
Write a note on how forests influence the quality of our air, soil and water resources.
How do organisms contribute in the formation of soil?
What is soil? How does it form?
Mention briefly the role of decomposers of cycling of materials.
Which of the following is not a greenhouse gas?
Following are a few organisms
(a) lichen (b) mosses (c) mango tree (d) cactus Which among the above can grow on stones; and also help in the formation of soil? Write the mode of their action for making soil.
Lichens are called pioneer colonisers of bare rock. How can they help in the formation of soil?
Fertile soil has lots of humus. Why?
Carbon dioxide is necessary for plants. Why do we consider it a pollutant?
