Agriculture, Irrigation, Seeds, Fertilizers and other Inputs

11. Which nutrient is essential for plant growth and is often supplied through fertilizers?
a) Nitrogen
b) Carbon
c) Oxygen
d) Hydrogen

12. Which of the following is an organic fertilizer?
a) Urea
b) Ammonium nitrate
c) Compost
d) Superphosphate

13. Which of the following is a disease that affects rice crops?
a) Black rust
b) Leaf curl
c) Yellow mosaic
d) Brown spot

14. Which of the following is a disease that affects wheat crops?
a) Late blight
b) Rust
c) Downy mildew
d) Bacterial wilt

15. Which of the following is a disease that affects tomato plants?
a) Verticillium wilt
b) Citrus canker
c) Early blight
d) Crown gall