46. Which of the following is an essential micronutrient required for plant growth and is commonly provided to crops in the form of chemical fertilizers?
a) Nitrogen
b) Calcium
c) Zinc
d) Phosphorus
47. Which of the following is an essential micronutrient required for plant growth and is commonly provided to crops in the form of chemical fertilizers?
a) Nitrogen
b) Iron
c) Potassium
d) Phosphorus
48. Which of the following is an essential micronutrient required for plant growth and is commonly provided to crops in the form of chemical fertilizers?
a) Nitrogen
b) Calcium
c) Zinc
d) Phosphorus
49. Which of the following is an essential micronutrient required for plant growth and is commonly provided to crops in the form of chemical fertilizers?
a) Nitrogen
b) Iron
c) Potassium
d) Phosphorus
50. Which of the following is a method of crop management that involves the application of organic matter to improve soil fertility?
a) Crop rotation
b) Mulching
c) Green manuring
d) Intercropping
