Test:Soils of India- 1 - Class 4 MCQ

Apples and Pears grow best in valleys because valleys provide the right kind of environment and soil for these fruits to grow healthy and tasty. Valleys have the perfect conditions like good sunlight and water for these fruits to thrive and become delicious for us to eat.

• Mountain soils are found on the slopes of mountains, but they are not very fertile for growing crops. The slopes of mountains have gravelly and small broken pieces of stones, making it difficult for crops to grow well. Orchards are grown on the slopes, rice in the valley, and potatoes almost everywhere.
• So, the statement is False because mountain soils are not very fertile for growing crops.

Humus is dark, organic material that forms in soil when plant and animal matter decays. When plants drop leaves, twigs, and other material to the ground, it piles up. ... The thick brown or black substance that remains after most of the organic litter has decomposed is called humus.

Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. A similar process, weathering, breaks down or dissolves rock, but does not involve movement.

• True! Soil erosion means the movement of soil from one place to another. This can happen due to different reasons like wind, rain, or glaciers.
• When the soil moves away, it can be challenging for plants to grow and for us to use the land for farming.
• So, it's important to learn about soil erosion and how to prevent it to keep our land healthy and useful.

Soil is made up of minerals, plants, animals, and also contains water. Water is important for the health of the soil and helps plants grow.

Alluvial soils are found in the basins of Sutlej, Ganga, and Brahmaputra rivers. These soils are very fertile, ideal for growing various crops. Farmers like to grow crops on alluvial soils because they provide good nutrients to plants and help them grow healthy and strong.

• Explanation: Cotton indeed grows best in black soils. Black soils are very fertile and suitable for growing crops like cotton, which need good nutrients to grow well. So, the statement that cotton grows best in black soils is True.

• Additional Fact: Black soils are also known as regur soils and are rich in minerals like calcium, magnesium, and potassium, making them excellent for agriculture.

Planting of trees and grass to cover and bind the soil with their roots to prevent erosion is called afforestation. 

Terrace farming soil conservation methods involve changing a steep hill into smaller, flatter fields

Explanation:

• Windbreak involves planting rows of trees or shrubs to reduce wind speed. These barriers help prevent soil erosion by wind, particularly in areas with loose, dry soil. The trees or shrubs act as a shield, reducing the force of the wind and trapping soil particles that might otherwise be blown away.

So, Windbreak is a method of soil conservation that effectively protects the soil from wind erosion.

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