. Answer the following questions
1. How does absorption of water by soil differ from percolation of water through soil?
2. Why erosion of soil is more severe in deserts or bare lands?
3. A sample of soil takes 40 minutes to percolate 800ml of water. What is the rate of
percolation of water?
4. What is humus? What role it plays in soil?
5. State the factors in which nature of the soil depends
6. 200ml of water was taken in a measuring cylinder. This water was added dropwise to
120g of dry soil kept on filter paper in a funnel. When the water just started dripping
from the funnel, the amount of water left in the measuring cylinder was found to be
140ml. Calculate the percentage of water absorbed by this soil.
7. How soil is important natural resource?
8. Which type of soil is better for following & why?
a)For making pots
b)For growing plants
c)To reach wells
Answers
Answer:
HERE IS YOUR ANSWER
Explanation:
1. Percolation property of any material is linked to its porosity. Different soils have different porosity. Therefore, water percolates differently through different soil. ... High water retaining capacity means higher water absorption.
2. Plants and trees are the primary reason for the strong binding of soil. Deserts and bare lands lack in plantation to a large extent. As a result, the soil in those regions becomes loose and that makes wind carry the soil easily. Thus soil erosion is severe in deserts and bare land.
3. =10mL/min. Hence, the rate of percolation of water through the given soil sample is 10 mL/min.
4. Humus allows soil organisms to feed and reproduce, and is often described as the "life-force" of the soil. The process that converts soil organic matter into humus feeds the population of microorganisms and other creatures in the soil, and thus maintains high and healthy levels of soil life.
5. Factors responsible for soil formation are parent material, climate, topography, organisms and time.
6. Amount of water absorbed = 60 mL
Percentage of water absorbed = (60/200×100)% = 30%
7. Soil supports the growth of plants, provides shelter to many organisms and is important for agriculture which provides us with food. Hence, soil is an important human resource.
8.
a) Clayey soil
b) Loamy soil
c) sandy or sandy loam
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