Question : Rotation of crops is essential:
Option 1: For increasing the quantity of minerals
Option 2: For decreasing the quantity of proteins
Option 3: For getting different kinds of crops
Option 4: For increasing fertility of the soil
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Correct Answer: For increasing fertility of the soil
Solution : The correct answer is for increasing fertility of soil.
Naturally the soil fertility depends upon the parent Rock material and the vegetation. Crop rotation is a practice of growing different crops in successive seasons. High nutrient demanding crops are followed by low nutrient demanding crops which helps the soil to regain its lost nutrients and improve its fertility. It also dissociates pests and weeds cycle of growth and helps to produce good output.
Example- maize and mustard, rice and wheat etc.
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Question : Sparying of DDT on crops causes pollution of_________
Option 1: Air & Soil
Option 2: Crops & Air
Option 3: Soil & Water
Option 4: Air & Water
Question : Salination of soil is caused by
Option 1: Pesticides
Option 2: Soil erosion
Option 3: Excess irrigation
Option 4: Crop rotation
Question : Nitrogen is an essential constituent of all:
Option 1: Fats
Option 2: Proteins
Option 3: Vitamins
Option 4: Carbohydrates
Question : Water flows off the wings of birds and insects due- to the presence of
Option 1: Waxes
Option 2: Sugars
Option 3: Proteins
Option 4: Minerals
Question : The soil of Kerala is rich in which of the following soils?
Option 1: Alluvial Soil
Option 2: Laterite Soil
Option 3: Sandy Soil
Option 4: Loamy Soil
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