(e) What are the various uses of soil ?
(f) What is the need and importance
of soil testing from the point of
view of farmers?
(g) What is the importance of air in
transmission of sound?
(h) Why should a glass bottle completely
filled with water never be kept in
a freezer?
Answers
Answer:
1)....Soil provides plants with foothold for their roots and holds the necessary nutrients for plants to grow; it filters the rainwater and regulates the discharge of excess rainwater, preventing flooding; it is capable of storing large amounts of organic carbon; it buffers against pollutants, thus protecting groundwater ...
2)...Soil tests are used to determine the soil's nutrient level and pH content. Armed with this information, farmers can define the quantity of fertiliser and exact type that is needed for application to improve the soil on your farm. This is essential because fertile soils are necessary to grow healthy crops.
3)Air acts as a medium for transmission of sound. When a sound wave passes through air, the particles of air vibrate back and forth, parallel to the direction of the sound wave.
Answer:
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