Which of the following soils is also known as 'Regur soil'?

Which of the following statements is/are incorrect?

a. Alluvial soils are intensively cultivated. b. Alluvial soils are rich in lime, iron, magnesia and alumina. c. Alluvial soils vary from brown to grey colours.

Which of the following statements is/are correct?

a. Soil Survey of India has classified the Indian soils on the basis of their nature and character as per the United States Department of Agriculture (USDA) Soil Taxonomy. b. There are eight broad types of Indian soils under the classification as per the United States Department of Agriculture (USDA) Soil Taxonomy. c. The percentage of mollisols type of soil is the highest in India.

Which of the following soil types develops wide cracks in dry season?

_________ soil covers most of the Deccan plateau which includes parts of Maharashtra, Madhya Pradesh, Gujarat, Andhra Pradesh and some parts of Tamil Nadu.

Which of the following statements is/are correct?

a. Alluvial soils are depositional soils, transported and deposited by rivers and streams. b. Bhangar is the new alluvium and is deposited by floods annually, which enriches the soil by depositing fine silts. c. Alluvial soils are more loamy and clayey in the lower and middle Ganga plain and the Brahamaputra valley.

Which of the following soil types is/are suitable for cashew crops?

Which of the following statements is/are correct?

a. Black soils swell and become sticky when wet and shrink when dried. b. Black soils are generally clayey, deep and impermeable. c. Black soils are rich in phosphorus, nitrogen and organic matter.

Which of the following statements is/are correct?

a. Red soil develops on crystalline igneous rocks in areas of low rainfall in the eastern and southern parts of the Deccan plateau. b. Red soil develops a reddish colour due to a wide diffusion of iron in crystalline and metamorphic rocks. c. The fine grained red and yellow soils are normally infertile.

Which of the following statements is/are incorrect?

a. Laterite soils are poor in organic matter, nitrogen, iron oxide and potash. b. Nitrogen is insufficient in arid soils and the phosphate content is normal. c. Red and yellow soils are rich in lime, iron, magnesia and alumina.

Which of the following statements is/are correct?

a. Forest soils are loamy and silty on valley sides. b. Forest soils are coarse grained in the upper slopes. c. The soils in the snow-bound areas of the Himalayas are saline with high potassium content.

The degree of soil degradation varies from place to place according to which of the following?

a. Topography b. Wind velocity c. Amount of rainfall

Which of the following statements is/are correct?

a. Sheet erosion is a type of wind erosion that takes place in arid and semi-arid areas. b. Sheet erosion removes the finer and more fertile top soil. c. Badland topography is a result of sheet erosion.

There is a kankar layer in the lower horizons of the arid soils. Which of the following statements is/are correct about this layer?

a. Lower horizons of the soil are occupied by ‘kankar’ layers because of the increasing calcium content downwards. b. It restricts the infiltration of water, and when irrigation is made available, the soil moisture is readily available for a sustainable plant growth. c. It restricts the infiltration of water, and even when irrigation is made available, the soil remains infertile.

Which of the following statements is/are incorrect?

a. The headward extension of gullies can be controlled by gully plugging, terracing or by planting cover vegetation. b. In arid and semi-arid areas, cultivable lands can be saved from encroachment by sand dunes through developing shelter belts of trees and agro-forestry. c. Lands with a slope gradient of 15 - 25 percent should not be used for cultivation.