21. What is the causal organism of the disease 'fire blight of apple'?
22. Which among the following is a vaccine developed by CSIR and Ministry of Science and Technology for Johne's disease affecting sheep, goat, cow and buffalo so as to immunise them and increase milk and meat production?
23. Which one of the following stage can be assessed by using a following said empirical equation?
$$A = \frac{{{\text{Economic production}}}}{{{\text{Biomass production}}}}$$
$$A = \frac{{{\text{Economic production}}}}{{{\text{Biomass production}}}}$$
24. From which part of pant the 'Asafoetida or heeng' is obtained?
25. The drone in honeybee are
26. Which of the plant products is used in leather industry?
27. Honey contains mainly
28. Which of the following disease is not related to bajara?
29. Kancha' is an improved variety of
30. Bark of this is used as a condiment
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