The plants commonly sown for crop rotation are :

Related Mcqs:

1. Rotation of crop is essential for:

   A. Increasing fertility of soil
   B. Increasing quality of protein
   C. Getting different kinds of crops
   D. Increasing quality of minerals

2. Which of the following is generally used for induced mutagenesis in crop plants?

   A. Gamma rays (from cobalt 60)
   B. X-rays
   C. UV (260 nm)
   D. Alpha particles

3. The non-green plants are as important as the green plants because they:

   A. Cause human disease
   B. Cause diseases of other plants
   C. Are useful in several industries
   D. Bring about decomposition of dead animals and plant remains

4. Those chemicals which are produced by plants and affect other plants are broadly called:

   A. Depresants
   B. Allomones
   C. Allelochemics
   D. Kairomones

5. Among the plants listed, point out one that does not fit into ecological group represented by the other plants:

   A. Acacia
   B. Aloe
   C. Euphorbia
   D. Rhizophora

6. Among the plants listed, point out one that does not fit into biological group represented by other plants

   A. Euphorbia
   B. Acacia
   C. Vallisneria
   D. Aloe

7. The major kinds of rotation are:

   A. Physical
   B. Silvicultural
   C. Technical
   D. Rotation of the greatest volume production
   E. All of the above

8. A minima rotation worth the name is specified which corresponds to the age at which the trees reach the exploitable size which is usually 120 years, but is 150 years for the deodar, fir and kail in the moist zone of Kaghan 200 years for the ry zone of ______

   A. Swat
   B. Naran
   C. Kaghan
   D. None of these

9. If the same crop is repeatedly grown in a field:

   A. Nitrogen starvation many result
   B. Specific mineral deficiency may arise
   C. Soil will become prone to diseases
   D. Water level in soil will recede

10. To prevent wind and water erosion, the crop is sometimes harvested in such a way that a basal stub of the plant is left behind. This phenomenon is called:

    A. Ley farming
    B. Mulching
    C. Basin listing
    D. Strip cropping