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Question 1 of 5
1. Question
1 pointsConsider the following statements regarding Laterite Soil.
1. The laterite soils develop in areas with high temperature and low rainfall.
2. Humus content of the soil is removed fast by bacteria that thrives well in high temperature.
3. Since iron oxide and potash are in excess, laterites are suitable for cultivation.
Which of the above statements is/are correct?Correct
The laterite soils develop in areas with high temperature and high rainfall. These are the result of intense leaching due to tropical rains. With rain, lime and silica are leached away, and soils rich in iron oxide and aluminium compound are left behind. Humus content of the soil is removed fast by bacteria that thrives well in high temperature. These soils are poor in organic matter, nitrogen, phosphate and calcium, while iron oxide and potash are in excess.
Hence, laterites are not suitable for cultivation; however, application of manures and fertilisers are required for making the soils fertile for cultivation.Incorrect
The laterite soils develop in areas with high temperature and high rainfall. These are the result of intense leaching due to tropical rains. With rain, lime and silica are leached away, and soils rich in iron oxide and aluminium compound are left behind. Humus content of the soil is removed fast by bacteria that thrives well in high temperature. These soils are poor in organic matter, nitrogen, phosphate and calcium, while iron oxide and potash are in excess.
Hence, laterites are not suitable for cultivation; however, application of manures and fertilisers are required for making the soils fertile for cultivation. -
Question 2 of 5
2. Question
1 pointsConsider the following statements.
1. The laterite soils are commonly found in the hilly areas of Odisha and Assam.
2. Common salt is obtained from Arid soils.
3. Gypsum is added to solve the problem of salinity in the soil.
Which of the above statements is/are correct?Correct
The laterite soils are commonly found in Karnataka, Kerala, TamilNadu, Madhya Pradesh and the hilly areas of Odisha and Assam.
In Arid soils in some areas, the salt content is so high that common salt is obtained by evaporating the saline water.
Gypsum is added to solve the problem of salinity in the soil.Incorrect
The laterite soils are commonly found in Karnataka, Kerala, TamilNadu, Madhya Pradesh and the hilly areas of Odisha and Assam.
In Arid soils in some areas, the salt content is so high that common salt is obtained by evaporating the saline water.
Gypsum is added to solve the problem of salinity in the soil. -
Question 3 of 5
3. Question
1 pointsEarth experiences highest temperatures in the subtropics of the northern hemisphere rather than at the equator. Why?
Correct
D is the correct answer.
Incorrect
D is the correct answer.
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Question 4 of 5
4. Question
1 pointsConsider the following statements regarding Soil Degradation.
1. Soil degradation occurs when the nutritional status declines and depth of the soil goes down due to erosion and misuse.
2. Once the soil forming processes is complete, the erosional processes start and both does not go simultaneously.
3. Wind Erosion takes place mainly in the form of sheet and gully erosion.
Which of the above statements is/are correct?Correct
In a broad sense, soil degradation can be defined as the decline in soil fertility, when the nutritional status declines and depth of the soil goes down due to erosion and misuse. Soil degradation is the main factor leading to the depleting soil resource base in India.
The destruction of the soil cover is described assoil erosion. The soil forming processes and the erosional processes of running water and wind go on simultaneously.
Wind and water are powerful agents of soil erosion because of their ability to remove soil and transport it. Wind erosion is significant in a rid and semi-arid regions. In regions with heavy rainfall and steep slopes, erosion by running water is more significant. Water erosion which is more serious and occurs extensively in different parts of India, takes place mainly in the form of sheet and gully erosion.Incorrect
In a broad sense, soil degradation can be defined as the decline in soil fertility, when the nutritional status declines and depth of the soil goes down due to erosion and misuse. Soil degradation is the main factor leading to the depleting soil resource base in India.
The destruction of the soil cover is described assoil erosion. The soil forming processes and the erosional processes of running water and wind go on simultaneously.
Wind and water are powerful agents of soil erosion because of their ability to remove soil and transport it. Wind erosion is significant in a rid and semi-arid regions. In regions with heavy rainfall and steep slopes, erosion by running water is more significant. Water erosion which is more serious and occurs extensively in different parts of India, takes place mainly in the form of sheet and gully erosion. -
Question 5 of 5
5. Question
1 pointsConsider the following statements regarding Soil Erosion.
1. Sheet erosion takes place on level lands after a heavy shower and is harmful since it removes the finer and more fertile top soil.
2. Gully erosion is common on steep slopes which leads to level lands fit for cultivation.
Which of the above statements is/are correct?Correct
Water erosion which is more serious and occurs extensively in different parts of India, takes place mainly in the form of sheet and gully erosion. Sheet erosion takes place on level lands after a heavy shower and the soil removal is not easily noticeable. But it is harmful since it removes the finer and more fertile top soil. Gully erosion is common on steep slopes. Gullies deepen with rainfall, cut the agricultural lands into small fragments and make them unfit for cultivation.
Incorrect
Water erosion which is more serious and occurs extensively in different parts of India, takes place mainly in the form of sheet and gully erosion. Sheet erosion takes place on level lands after a heavy shower and the soil removal is not easily noticeable. But it is harmful since it removes the finer and more fertile top soil. Gully erosion is common on steep slopes. Gullies deepen with rainfall, cut the agricultural lands into small fragments and make them unfit for cultivation.
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