Agricultural Microbiology — DU B. Sc. (Hons) Microbiology Previous Year Question Papers

Attempt four questions in all Q.1. a. What are PGPR? Discuss giving suitable examples. 6 b. Discuss mass production and field applications of Trichoderma spp. OR c. Write about any two chemical properties of soil. 3 Q.2. a. What role do microbes play in biogeochemical cycling of phosphorus? 5 b. Discuss significance of agrowaste management as a source of biofuel. c. Give an example of each of the following i. Micronutrient in soil ii. Asymbiotic nitrogen fixer iii. Viral biopesticide iv. Actinomycete biofertilizer 1x4=4 Q.3. a. Write a note on organic farming, its types and advantages. 6 c. What are the advantages of biopesticides over chemical pesticides? 3 Q.4. Discuss the isolation, characteristics, mass production and field applications of the following (any two): i. Azotobacter ii. Anabaena iii. Rhizobium 7.5x2=15 Q.5. Write short notes on the following (any three): i. Role of NPK in soil fertility i1. Agrobacterium mediated plant transformations iii. Composting iv. Metarhizium anisopliae 5x3=15