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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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Subject: Agricultural Microbiology × Type: Thesis ×
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Now showing 1 - 9 of 198
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    ThesisItemOpen Access
    Development of Liquid Formulation of Pseudomonas Striata – A Phosphate Solubilizing Biofertilizer
    (University of Agricultural Science, Dharwad, 2016-01) Parvathi S.; Patil, C.R.
    Present study was conducted to develop liquid formulations of Pseudomonas striata, a phosphate solubilizing bacteria using different concentrations of additives, adjuvants, and surfactants. Out of the 32 liquid formulations developed, 12 formulations with population more than 5 x 1010 CFU ml-1, after 84 hr of growth were selected for shelf life studies. Formulation 18 with 10 mM glycerol, 0.5% PEG, 0.05% CMC, 0.15% GA and 250 ppm polysorbate 20, recorded the highest population of 3 x 1010 CFU ml-1 after six months of incubation and was used to optimize the dosage of liquid formulation required to treat maize and sorghum seeds. Results clearly indicated that for treating bold seeds such as maize only 2 ml kg-1 of seeds of this formulation showed higher inoculant survival on seeds (log10 6.72), seed germination (94 %), root length (20.59 cm), shoot length (17.92 cm) and seedling vigour (3620.43). Similarly, for treating small sized seeds such as sorghum 4 ml kg-1 seed of formulation was found optimal. It resulted in higher inoculant survival on seed (log10 5.36), root length (26.60 cm), shoot length (26.03 cm) and seedling vigour (489.33). However, the highest per cent germination (92.5%) of sorghum seeds was observed in seeds treated @ 6 ml kg-1 of this inoculum. The cost involved in developing a litre of the best liquid formulation was ` 149. While the cost of lignite based formulation was ` 60 kg-1 which normally is inoculated @ 20 g kg-1 seed, thus costing about ` 1.2 kg-1. However, our results indicated that only 2 to 4 ml of the liquid formulation was sufficient to treat one kg of seed which costed less than one rupee per kg of seeds, there by reducing the total cost of treating with biofertilizer by 50 - 75%.
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    ThesisItemOpen Access
    EFFECT OF CO-INOCULATION OF BRADYRHIZOBIUM AND PHOSPHATE SOLUBILIZERS ON THE GROWTH AND YIELD OF GREENGRAM (vigna radiata (L.) Wilczek)
    (University of Agricultural Sciences, Dharwad, 2003) GANI, PARASHURAM; EMMIMATH, V S
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    ThesisItemOpen Access
    COMPOSTING OF WOOD WASTE GENERATED IN A PAPER MILL AND ITS NUTRIENT ENRICHMENT
    (University of Agricultural Sciences, Dharwad, 2003) SHARATH S., S; JAGADEESH, K S
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    CHARACTERIZATION OF ENDORHIZOSPHERE DIAZOTROPHIC BACTERIA AND THEIR INFLUENCE ON GROWTH AND YIELD OF MAIZE PLANTS
    (University of Agricultural Sciences, Dharwad, 2003) NAIKAR, R B; ALAGAWADI, A R
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    SCREENING OF WINE YEASTS AND POMEGRANATE (Punica granatum L.) CULTIVARS FOR WINE PRODUCTION
    (University of Agricultural Sciences, Dharwad, 2002) MATAPATHI, SHASHIKANTAYYA S.; PATIL, A. B.
    Experiments were conducted to screen efficient wine yeasts and pomegranate cultivars suitable for quality wine production. Ten yeast strains isolated were compared with reference strain of Saccharomyces ellipsoideus No. 101 and found that strain FWY-4 and FWY-6 were shown to be good with respect to assimilation of different carbon sources and • growth on YEPD broth. However, highest alcohol tolerance (8.3%) was exhibited by reference strain followed by FWY-4 (8.25%) and FWY-6 (7.80%). Saccharomyces ellipsoideus No. 101 produced maximum alcohol content in wine when inoculated to Ganesha variety of pomegranate fruits but it contained least amount of tannins and esters. The wine from Kesar variety recorded maximum, aldehydes and proteins while Arakta wine had highest amount of NPK. The branded wines when produced by blending Ganesha wine and Arakta wine in the ratio of 2:1 showed highest acceptability with better organoleptic characteristics. However the wine from Arakta variety alone had overall better acceptability inoculated with Saccharomyces ellipsoideus No. 101.
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    ThesisItemOpen Access
    EFFECT OF FOLIAR INSECTICIDES ON SOIL MICROORGANISMS AND THEIR BIOCHEMICAL PROCESSES IN SOILS OF GULBARGA
    (University of Agricultural Sciences, Dharwad, 2000) LAKSHMIKANTHA, H C; KULKARNI, J H
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    STUDIES ON ETHANOL PRODUCTION FROM AGRO-RESIDUES
    (University of Agricultural Sciences, Dharwad, 2004) GAURAV, MANJUNATH S; SHIRNALLI, GEETA
    Environmental pollution and demand for energy are the major challenges that the world is facing today, this is due to increase in population and the advances in technologies. Therefore, ethanol is being blended with petrol or diesel @ 20% for conserve the natural resource and decrease the pollution. 90 per cent of the ethanol is being currently produced from molasses. However due of its higher cost, it is necessary to search an alternate source that is cost effective. According to the statistical analysis, paddy, wheat and sugarcane are the major crops in India. Hence, the present study was conducted to know the potential of these three crop residues for ethanol production. The crop residues were subjected to microbiological and crude enzyme pretreatment to obtain maximum reducing sugars. Among these pretreatment methods combined inoculation of Phanerochaete chrysosporium and Pleurotus spp in paddy straw (1.27 mg g'1) and bagasse (1.97 mg g"1) and combined inoculation of Trichoderma viride and Phanerochaete chrysosporium (1.47 mg g'1) in wheat straw was found to be effective in releasing the reducing sugar compared to enzymatic pretreatment. Hence, microbiological pretreatment along with respective substrates were subjected for further studies on ethanol production. The substrates were further subjected to fermentation of filtrates and fermentation along with the solid substrates.Among these, filtrate fermentation showed maximum release of ethanol (820.80 mg L"1) and Zymomonas mobilis was efficient in releasing ethanol from all the substrates. Among the substrates, bagasse recorded maximum release of ethanol compared to paddy straw and wheat straw. Thus, it can be concluded that fermentation of microbiologically pretreated filtrate of bagasse using Zymomonas mobilis is the best method for ethanol production.
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    ThesisItemOpen Access
    APPLICATION METHODS OF VA MYCORRHIZAL INOCULUM FOR CROPS IMPORTANT IN AGRICULTURE, HORTICULTURE AND FORESTRY
    (University of Agricultural Sciences, Dharwad, 1999) G, MAMATHA; BAGYARAJ, D J
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    BENEFICIAL RHIZOSPHERE MICROFLORA OF BLACK PEPPER (Piper nigrum L.) AND THEIR ROLE IN GROWTH OF THE PLANT
    (University of Agricultural Sciences, Dharwad, 2000) Ranjitha, K; Kulkarni, J H
    Investigations were carried out on the native population o f beneficial microrganisms in the rhizosphere o f black pepper and inoculation effect of selected isolates on the rooting and growth of the plant in nursery. The rhizosphere samples were collected from Sirsi and Coorg regions in Kamataka and Kasargod district in Kerala. The study revealed a higher population of free living nitrogen fixers in rhizosphere soil, Azospirillum in endorhizosphere and percent root colonization (PRC) of vesicular arbuscular mycorrhiza (VAM) in samples collected from Coorg and Sirsi regions. But, the average number of phosphate solubilizers maintained the same level in all the major locations. Correlation studies revealed a significant association of soil organic carbon with population of Azospirillum in the endorhizosphere, PRC of VAM and the free living nitrogen fixers in soil. The available nitrogen positively correlated with PRC ofVAM. The significant correlation oiAzospirillum with phosphate solubilizers confirmed the synergism among these microorganisms. Thirty eight isolates of Azospirillum and 31 isolates o f phosphate solubilizers were obtained in this study. The nitrogen fixation efficiency of Azospirillum isolates ranged from 9.4 to 23.7 mg N2/ g malate used and the _ phosphate solubilizing efficiency o f the phosphate solubilizers varied from a Pi release of 8.1 to 19.1 mg/ 100ml Pikovskaya's broth.In vitro screening of the isolates for phytohormone synthesis indicated the varying efficiency among the isolates and a Azospirillum isolates as superior ones. Inoculation of pepper cuttings with Azospirillum cultures prior to planting resulted in an improved rooting percentage and better root growth compared to control. Single and dual inoculation of Azospirillum and phosphate solubilizing bacteria improved the vigour and nutrient status of the black pepper plants. The Azospirillum stiains AZBR 9 and the phosphate solubilizer BRPS 16 was found to be superior in vivo.