31. Which of the following is an example of a nitrogen-fixing plant that is commonly used in crop rotation?
a) Rice
b) Wheat
c) Peas
d) Maize
32. Which of the following is a method of soil conservation that involves growing a cover crop to protect the soil from erosion?
a) Crop rotation
b) Terrace farming
c) Strip cropping
d) Contour plowing
33. Which of the following is a method of soil conservation that involves shaping the land into terraces to reduce water runoff?
a) Crop rotation
b) Terrace farming
c) Strip cropping
d) Contour plowing
34. Which of the following is a method of soil conservation that involves plowing along the contours of the land to prevent water runoff?
a) Crop rotation
b) Terrace farming
c) Strip cropping
d) Contour plowing
35. Which of the following is a method of soil conservation that involves planting different crops in a specific order to improve soil fertility?
a) Crop rotation
b) Terrace farming
c) Strip cropping
d) Contour plowing
