The soil has the largest space between their partical Clayey,loamy,sandy,none of these
Answers
Answer:
Explanation:
A sandy soil has the highest proportion of sand particles and the lowest proportions of silt and clay (within the fine earth fraction), a clayey soil has the highest proportion of clay particles, and the loam soil has the most even distribution of sand, silt, and clay particles.
Explanation:
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Page No 109:
Question 1:
Soil is made up of two main components–one that comes from living things and the other from non-living things. What are these components?
ANSWER:
The two components of soil are as follows:
1. Humus: Humus is the dark, brown coloured component of the soil and is produced by dead remains of living things.
2. Mineral particles: Mineral particles include minerals such as potassium, calcium and magnesium. These are derived from rocks (non-living things).
Page No 109:
Question 2:
Water expands when it freezes. What role does this play in soil formation?
ANSWER:
The rain water that enters into the cervices of large rocks, freezes in winters and expands. The expansion of water creates a pressure and leads to the breakdown of large rocks into small fragments, which form soil.
Page No 109:
Question 3:
What kind of soil will hold more water–one made up of small particles or one with bigger particles?
ANSWER:
Soil made up of small particles will hold more water as compared to soil made up of bigger particles. This is because small particles pack closely which increases water retention capacity of soil.
Page No 109:
Question 4:
Farmers generally like the soil to be a mixture of sand, silt, clay and humus. Why? What is such soil called?
ANSWER:
The soil that is a mixture of slit, sand, clay and humus is preferred by the farmers because it is good for the growth of plants. This type of soil is called loamy soil. Loamy soil contains optimum water retention capacity as well as air trapping ability, which makes it perfect to support plant growth.
Page No 109:
Question 5:
Soil is formed by weathering of rocks. What does 'weathering' mean?
ANSWER:
Weathering is a process in which large rocks are broken down into smaller fragments by the action of natural forces such as winds, water and glaciers. The smaller fragments formed by this process form soil.
Page No 111:
Question 1:
Rainwater percolates through the soil. Where does this water collect? What is the level of this water known as?
ANSWER:
Percolated rain water collects over the bed rock which lies just beneath the parent rock. The level of water that percolates through the soil is called water table.
Page No 111:
Question 2:
Soil that has more sand in it absorbs less water than soil that has more clay in it. Which of these allows more water to percolate down?
ANSWER:
Soil that has more sand has the ability to allow more water to percolate down. This is because the sandy soil is loose and water can easily pass through loose soil.
Page No 111:
Question 3:
Different crops require different types of soil to grow best. What kinds of soils are best for the following?
a. wheat
b. pulses
c. cotton
ANSWER:
a. Wheat can be best grown in loamy as well as clayey soils.
b. In order to grow pulses, loamy soils are considered best.
c. Cotton requires sandy-loam type of soil for its best growth.
Page No 111:
Question 4:
Name three things for which we depend on the soil.
ANSWER:
We depend on the soil for the following things:
1. Food, shelter and clothing
2. Minerals
3. Water