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University of Agricultural Sciences, Dharwad

The University of Agricultural Sciences, Dharwad was established on October 1, 1986. The University has 5 Colleges, 27 Research Stations, 6 Agriculture Extension Education Centers, 6 Krishi Vigyan Kendras and ATIC. The University has its jurisdiction over 7 districts namely Bagalkot, Belgaum, Bijapur, Dharwad, Gadag, Haveri, and Uttar Kannada in northern Karnataka. Greater diversity exists in soil types, climate, topography cropping and farming situations. The jurisdiction includes dry-farming to heavy rainfall and irrigated area. Important crops of the region include sorghum, cotton, rice, pulses, chilli, sugarcane, groundnut, sunflower, wheat, safflower etc. The region is also known for many horticultural crops. Considerable progress has been registered in the field of education, research and extension from this University.

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1993 - 199954
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Subject: Agricultural Microbiology × Type: Thesis × Start date: 1993 × End date: 1999 × Thesis Type: M.Sc ×
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Now showing 1 - 9 of 54
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    ThesisItemOpen Access
    CHARACTERIZATION OF ETHYLENE DIAMINE RESISTANT MUTANTS OF Azospirillum Spp. DERIVED FROM WHEAT
    (University of Agricultural Sciences, Dharwad, 1999) S, SHUBHA; SAVALAGI, V P
    Experiments were conducted to isolate native Azospirillum strains from the rhizoplane and endorhizosphere of 27 wheat genotypes and 32 Azospirillum isolates were obtained. Among these six were Azospirillum lipoferum, 13 were Azospirillum brasilense and 13 isolates could not be grouped into either of the two categories. The isolate WAS-15 was found to fix in vitro high amount of nitrogen (24.80 mgN/g of malate) and could reduce acetylene (584r| moles/mg of protein/h). All the Azospirillum isolates were checked for the different salt tolerance levels, metal resistance and resistance to ethylenediamine. Based on above observations, the Azospirillum isolate WAS-15 with maximum resistance to ethylenediamine (0.02%) and higher acetylene reduction activity was subjected to mutation by gamma irradiation and NTG. All the mutants were characterized for colony morphology on different media and biochemical characterization, to observe any change has occurred as compared to its wild type. The observation revealed that mutant GWAS-15-3 could fix higher amount of nitrogen (50.17 mg of N/g malate) along with higher nitrogenase activity (1200 r\ moles/mg protein/ h). This was followed by GWAS-15-6 which could also fix higher level of nitrogen (48.91 mg of N/g malate) along with higher nitrogenase activity (1098 r| moles/mg protein/h). Paranodules in wheat were obtained at 0.6ppm concentration of 2,4-D and plasmid profile of the wild type were observed. Both mutants GWAS-15-3 and GWAS-15-6 possessed higher ammonia excretion than their wild type. Nitrogenase activity was not repressed in both the mutants even in presence of 0.1 mM NH4CI.
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    ThesisItemOpen Access
    PHOSPHORUS NUTRITION AND GROWTH OF Leucaena leucocephala AS INFLUENCED BY INTERACTION BETWEEN Glomus aggregatum, Bacillus polymyxa AND ROCK PHOSPHATE IN AN ALFISOL
    (University of Agricultural Sciences GKVK, Bangalore, 1993) Singh, Arvinder; Manjunath, A
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    EFFECT OF LONG TERM INTEGRATED NUTRIENT MANAGEMENT OF SORGHUM [Sorghum bicolor (L.) Moench] BASED CROPPING SYSTEMS ON DYNAMICS OF SOIL MICROFLORA AND SOIL ENZYMES
    (University of Agricultural Science, Dharwad, 1999) Govekar, Yeshwanth R; Emmimath, V S
    "The dynamics of soil microflora and soil enzymes were studied in a long term integrated nutrient management experiment in a fixed site during the year 1998-1999. A field experiment was initiated by AICRP on Sorghum at rmain research station - Dharwad (1991 -92) which included two cropping systems as a main plots and five combination of organic and inorganic sources as a sub - plots. Cropping systems had significant influence on soil microflora (Bacteria, fungi, actinomycetes, nitrogen fixing bacteria and P-solubilizing bacteria) and soil enzymes (urease and dehydrogenase). Groundnut-sorghum cropping system recorded maximum microbial population and enzyme activities as compared to the sorghum - safflower cropping system. Cropping systems had no significant influence on chemical properties of the soil. However, groundnut-sorghum cropping system recorded higher level of organic carbon, available nitrogen and available phosphorus as compared to the sorghum - safflower cropping system. Organic carbon, available nitrogen, available phosphorus, soil microflora and enzyme activities of the soil were significantly increased, with the combined application of organic and inorganic fertilizers as compared to RDF and control (without any application). There was positive correlation between soil microflora, soil enzymes and nutrient availability. Application of crop residues + 50% RDF recorded the highest sorghum and groundnut yield during kharifvjhen compared with other treatments. Whereas during rabi application of FYM + 50% RDF registered the higher safflower yield. However, 50% RDF + crop residues recorded the highest sorghum yield during rabi season."
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    ThesisItemOpen Access
    EFFECT OF PENDIMETHALIN AND ENDOSULPHAN ON BIOLOGY AND NITROGEN FIXATION OF TWO Azolla spp.
    (University of Agricultural Science, Dharwad, 1996) Kalpana, R; Shivappa Shetty, K
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    EFFECT OF POLLUTED WATER IRRIGATION ON SOIL NITRIFICATION
    (University of Agricultural Science, Dharwad, 1997) Kalpana; Vishwanth, N R
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    INFLUENCE OF VAM INOCULATION AT DIFFERENT LEVELS OF PHOSPHORUS ON GROWTH OF MICROPROPAGATED PLANTS
    (University of Agricultural Science, Dharwad, 1997) Shashikala, B N; Bagyaraj, D J
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    INFLUENCE OF PROTOZOA ON THE GROWTH AND ACTIVITIES OF BENEFICIAL SOIL MICRO-ORGANISMS IN RICE SOILS
    (University of Agricultural Science, Dharwad, 1997) Nagaveni, N M; Hegde, S V
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    STUDIES ON NODULATION AND SYMBIOTIC NITROGEN FIXATION IN FODDER TREE LEGUMES
    (University of Agricultural Science, Dharwad, 1996) Savitha, K N; Gopala Gowda, H S
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    SUBSTRATE EVALUATION FOR Calocybe indica A MILKY WHITE MUSHROOM
    (University of Agricultural Science, Dharwad, 1996) Ramalakshmi, B H; Shivappa Shetty, K
    ABSTRACT NOT AVAILABLE