Choose the most appropriate answer.

1. Which of these is a rabi crop?
a. gram
b. rice

2. Which of these is not a kharif crop?
a. wheat
b. maize
c. soybean
d. paddy

3. Which of these is the first step before growing a crop?
a. adding manures and fertilizers
b. sowing
c. preparation of soil
d. irrigation

4. Which one of the following is not true about ploughing?
a. It loosens the soil.
b. It aerates the soil.
c. It prevents soil erosion.
d. It allows easy penetration of roots into the soil.

5. Compost lacks which of the following nutrients?
a. nitrogen
b. phosphorus
c. potassium
d. all of these

6. Which of the following machines can be used to harvest a crop and also to beat out the grain from the chaff?
a. harvester
b. combine
c. thresher
d. harrow

7. Which one of the following does not add nutrients to the soil?
a. crop rotation
b. field fallow
c. manures
d. ploughing

8. Which of these is an organic substance obtained from the decomposition of plant and animal wastes?
a. manure
b. fertilizer
c. insecticide
d. weedicide

9. Which nutrients does the NPK fertilizer provide to the plants?
a. nitrogen
b. potassium
c. phosphorus
d. all of these