MCQs on Seed Production in Self & Cross-Pollinated Crops for ICAR (SRF or JRF) /ASRB /CSIR NET/BET Exams #1

1. Seed is a basic input in agriculture, because:
   (A) Seed is the cheapest input
   (B) Low quantity is required
   (C) The performance of other inputs depends on seed
   (D) Seed is saved by the farmer

2. Characteristics of quality seed:
   (A) High germination and vigour with relatively low moisture content
   (B) Genetically and physically pure
   (C) Free from seed-borne disease and insect pests
   (D) Above all

3. Seed plot should be:
   (A) Free from volunteer plants
   (B) Free from weeds, weed seeds, other crops, soil-borne diseases, and insect pests
   (C) Well-drained and have proper isolation distance
   (D) Above all

4. The isolation requirement of a seed crop depends on:
   (A) Its mode of reproduction
   (B) Pollen biology
   (C) Mode of dispersal of pollen
   (D) Above all

5. Time isolation for different varieties of a crop is maintained by considering:
   (A) Differential date of blooming of different varieties of seed crop
   (B) Differential date of sowing of different varieties of seed crop
   (C) Differential date of irrigation of different varieties of seed crop
   (D) None of the above

6. In seed production, lower seed rate than normal seed rate for raising commercial crops is desirable because:
   (A) It facilitates rouging operations and gives higher multiplication ratio
   (B) It facilitates weed infestation
   (C) It facilitates plant protection
   (D) Above all

7. An assured source of irrigation is a prerequisite for raising and harvesting quality seed because:
   (A) Stress decreases seed quality & yield
   (B) Less infestation of disease
   (C) Both A & B
   (D) None of the above

8. Roguing of diseased plants is necessary in seed production:
   (A) To control seed-borne diseases
   (B) To check further spread of disease
   (C) To enhance seed yield
   (D) Above all

9. In cross-pollinated crops, which stage of roguing is more important to avoid genetic contamination?
   (A) Pre-flowering
   (B) Flowering
   (C) Post-flowering
   (D) Above all

10. The number of field inspections depends on:
    (A) Crop duration and mode of pollination
    (B) Possibilities and nature of contamination
    (C) Stage of disease susceptibility
    (D) Above all

11. Border rows are maintained:
    (A) In Certified seed production
    (B) In Foundation seed production
    (C) In hybrid seed production
    (D) Above all

12. Largest isolation distance is required for:
    (A) Wind-pollinated crops
    (B) Insect-pollinated crops
    (C) Self-pollinated crops
    (D) None of the above

13. Pollen shedders are present in:
    (A) A Line
    (B) B Line
    (C) R Line

14. The limit of vapour-proof container for seed storage is:
    (A) 6–8%
    (B) 10–12%
    (C) 4–5%
    (D) 12–13%

15. As per Harrington’s thumb rule, the seed life is doubled:
    (A) For every 1% decrease in seed moisture
    (B) For every 5°C decrease in storage temperature
    (C) Both A & B
    (D) None of the above

16. Minimum number of field counts up to an area of 2 ha seed production:
    (A) 5
    (B) 7
    (C) 2
    (D) 10

17. In India, labeling of seed is:
    (A) Compulsory
    (B) Voluntary
    (C) Both A & B
    (D) None

18. Minimum number of plants to be taken in a single count of cotton crop:
    (A) 100
    (B) 500
    (C) 200
    (D) 1000

19. Objectionable weed seeds are:
    (A) Same size as the crop seed
    (B) Difficult to remove from crop seed
    (C) Similar in colour
    (D) All of the above

20. Time isolation is practiced in:
    (A) Wheat
    (B) Rice
    (C) Gram
    (D) Bajra