a) Describe the importance of aero microbiology in relation to the plant pathology.
b) prepare a detailed account on the anaerobic treatment of the sewage.
a) describe the decomposition of the soil organic matter.
b) What are biogeochemical cycles? Illustrate the role of microbes in nitrogen cycle.
a) describe the various kinds of mycorrhizal and prepare the significance of VAM fungi.
b) What is biological nitrogen fixation? prepare the biochemistry comprised in biological nitrogen fixation.
a) describe different procedures for the development of disease resistant varieties.
b) prepare various symptoms caused by plant pathogenic bacteria.
problem 5: prepare short notes on the terms given below:
• Water - borne pathogens.
• Soil microflora.
• Iron in soil.
• Plant growth promoting rhizobacteria.
• Etiology of blast of rice
• Importance of seed treatment.