Understanding Soil Nutrient Replenishment

Which of the following is a primary nutrient required by plants for healthy growth?

• Iron

• Nitrogen

• Zinc

• Copper

What is the main role of microorganisms in soil nutrient replenishment?

• Absorbing sunlight for plants

• Breaking down organic matter to release nutrients

• Producing oxygen for plant roots

• Preventing water loss from soil

Which of the following is NOT a benefit of crop rotation?

• Reduces soil erosion

• Increases pest and disease buildup

• Improves soil fertility

• Helps manage soil nutrients

Plants belonging to which family helps in fixing nitrogen to soil

• Cereals

• Millets

• Legumes

• All

What is a key difference between organic and inorganic fertilizers?

• Organic fertilizers are made from synthetic chemicals

• Inorganic fertilizers release nutrients slowly

• Organic fertilizers improve soil structure

• Inorganic fertilizers contain living organisms

Which of the following best describes the process of nitrogen fixation?

(a)   1 l

• Plants absorbing nitrogen directly from the air

• Microorganisms converting atmospheric nitrogen int
• Adding nitrogen-rich fertilizers to the soil

• Nitrogen being lost from soil due to leaching

Which of the following is an example of an inorganic fertilizer?

• Compost

• Manure

• Urea

• Bone meal

Why is phosphorus important for plant growth?

• It helps in the formation of chlorophyll

• It is essential for root development and energy transfer

• It prevents wilting of leaves

• It increases fruit sweetness

Name the type of microorganism present in root nodules of leguminous plants

• Bacteria

• Fungi

• Virus

• All

Which practice can help replenish soil nutrients naturally without using chemical fertilizers?

• Monoculture farming

• Crop rotation with legumes

• Over-irrigation

• Burning crop residues