Question 1:What is green revolution?
Answer 1:The enormousincrease in the production of food grain (especially wheat) during- the last three decades, due to use of seeds ofHYV (= High Yielding Varieties), higher dose of fertilizers and pesticides, and irrigation is known as green revolution.
Question 2:Mention the crop whose production has increased by blue revolution and yellow revolution.
Answer 2:Fish and oil production
Question 3:Give one example each of kharif and rabi crops.
Answer 3:Rice and what, respectively.
Question 4:What are plant nutrients?
Answer 4:Plant nutrients are inorganic raw materials that are absorbed from soil (water and air) by the plants for building up organic matter.
Question 5:Name the three most itnportant mineral elements required for plant growth.
Answer 5: Nitrogen, Phosphorus and Potassium.
Question 6: Name any two micronutrients,required by plants.
Answer 6: Manganese and Zinc.
Question 7: Name any two macrenutrients required by plants.
Answer 7: Carbon and Sulphur.
Question 8:What name has been given to the elements required by plants in (a) smaller amount; (b) larger amount.
Answer 8: (a) Micronutrients; (b) Macronutrients.
Question 9: State whether iron is a micronutrient with respect to plants
Answer 9: Iron is a micronutrient of plants.
Question 10. What is manure ?
Answer 10. Manure is partially decomposed organic matter formed from animal wastes (such as dung of cattle) and crop residue that is added to soil for increase in fertility.