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

(b) What is organic farming? Enlist the various methods and write their advantages. (6) 2. Attempt five questions in all. 1. (a) Write brief notes on the following : 4. (a). Write the applications of Bczcz.//ccs ffeijrz.77gz.cj7sz.s as a biocontrol agent. (4) (i) ,4zo//c!-47cczZ7¢G#¢ association (ii) Organic matter decomposition (4x2=8) (b) Highlight the role of free living and symbiotic nitrogen fixers as biofertilizers in agriculture. (b) Explain how soil texture influences water holding capacity and percolation of soil. (4) (c) Give an example of each of the following : / (i) Fungal bio;ontrol agent 2. (a) Explain how phylloplane microbes are isolated by leaf impression method. (6) (ii) Algal biofertilizer (1x2-2) (b) What are mycorrhiza? How they are beneficial to plants? (6) (a) Describe any. one metliod used to determine soil texture. , (5) 3. (a) Describe the different methods of composting. (b) Describe the mass production and methods of application of any bacterial biofertilizer. (7) (b) With the help of suitable diagrams describe the formation of nodule in a leguminous plant. 6. (a) Explain how quality testing for biofertilizers is done? (6)