10 Questions
How are fertilisers different from manure?
Fertilisers are chemicals rich in a particular nutrient, while manure is organic matter.
What are some examples of fertilisers mentioned in the text?
Some examples of fertilisers are urea, ammonium sulphate, super phosphate, potash, NPK (Nitrogen, Phosphorus, Potassium).
How has the use of fertilisers helped farmers?
The use of fertilisers has helped farmers to get better yield of crops such as wheat, paddy, and maize.
What negative impact can excessive use of fertilisers have on the soil?
Excessive use of fertilisers can make the soil less fertile.
How have fertilisers become a source of water pollution?
Fertilisers have become a source of water pollution due to their runoff into water bodies.
What are some methods suggested in the text to maintain soil fertility?
Some methods suggested are using organic manure, leaving the field fallow, and crop rotation.
How does the use of manure improve soil texture and water retaining capacity?
The use of manure improves soil texture and water retaining capacity by replenishing the soil with nutrients.
What is crop rotation and how does it help replenish soil nutrients?
Crop rotation is the practice of growing different crops alternately, helping in the replenishment of the soil with nutrients.
What practice did farmers in northern India adopt to replenish the soil with nitrogen?
Farmers in northern India used to grow legumes as fodder in one season and wheat in the next season to replenish the soil with nitrogen.
What role do Rhizobium bacteria play in crop cultivation?
Rhizobium bacteria help in nitrogen fixation and improve soil fertility.
Explore the relationship between plant growth and soil nutrients in this quiz. Learn about the importance of mineral nutrients, the effects of continuous cultivation on soil, and the necessity of manuring for replenishing nutrients.
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