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University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

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2015 - 20194
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Subject: Forestry × End date: 2019 × Start date: 2010 × Type: Thesis × Thesis Type: Ph.D ×
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Now showing 1 - 4 of 4
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    ThesisItemOpen Access
    EVALUATION OF MOLECULAR AND PHENOTYPIC DIVERSITY AND PHYSIOLOGICAL RESPONSES OF MELIA DUBIA TO MOISTURE STRESS
    (UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU, 2019-10-25) LOUSHAMBAM ROMEECHAND SINGH; Devakumar, A. S.
    The present investigation was carried out to assess the genetic variability of Melia dubia germplasm lines through molecular approach using SSR markers. From the results it is found that forty-two accessions segregated into thirteen genetically distinct clusters, indicating genetic diversity at molecular level. Further, growth of these lines was evaluated for five years in the field which receives low rainfall of 660 mm annually. A wide variation in growth was noticed among the forty-two lines under field conditions. To assess the physiological reasons for variation in growth, a controlled experiment was conducted by selecting ten accessions, of which five were the best and five were poor performing at field level. These lines were vegetatively multiplied through softwood cuttings and grown at field capacity and at 50% of field capacity (stress). From this study the Accessions MD058, MD013 and MD111 recorded highest growth both under field capacity and at 50 % moisture stress, while lowest growth was noticed in MD126 and 69 which corroborate with their field performance. Germplasm lines that recorded highest growth has also recorded highest photosynthetic rates both under field capacity as well as at 50 % moistures stress and they also recorded higher WUE, better photosynthesis recovery rates after stress and had higher drought susceptible index. The above results suggest that photosynthetic ability of a plant is a primary driver of growth. From the above results accessions MD058, MD013 and MD111 were found to perform better under low rainfall conditions.
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    ThesisItemOpen Access
    ASSESSMENT OF ABOVEGROUND BIOMASS AND CARBON STOCK IN THE TREE-BASED LAND USE SYSTEMS OF KODAGU BASED ON GROUND SAMPLING AND SPECTRAL MODELLING
    (UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU, 2019-09-26) HAREESH, T. S; NAGARAJAIAH, C.
    The study on assessment of aboveground biomass and carbon stocks in tree based land use systems of Kodagu was carried out during 2017-18 by using RS and GIS techniques. Significant difference between different land use systems in terms of diversity, composition, density and vegetation structural parameters was observed. Evergreen forests are found to be floristically richer and diverse among all land use systems. Among the production land uses, coffee plantations with native trees are also found to be rich with respect to species richness and diversity and almost resembled natural forests. Aboveground biomass and carbon in dry and moist deciduous forests, robusta and arabica coffee plantations with exotic tree, rubber and teak plantation were found to be on par with each other. On the other hand, biomass and carbon existed in evergreen forest, robusta and arabica coffee plantations with native trees and robusta coffee plantations with mixed trees were almost similar but differed significantly with other land use systems. In dry and moist deciduous forests, robusta coffee plantation with exotic type, arabica coffee plantations with native and exotic types and teak plantations, the maximum biomass and carbon was contributed by 90-120 cm girth class individuals. Whereas, in evergreen forests, robusta coffee plantation with mixed type and robusta coffee plantation with native types, the maximum biomass and carbon has been contributed by higher girth class (>180 cm). Therefore, removal of individuals from these classes significantly alters the carbon stock and dynamics in this region. Geospatial modelling of aboveground biomass and carbon revealed an average of 182.02 Mg ha–1 and 85.55 Mg ha–1 , respectively with a total of 74.70 Mt of biomass and 35.11 Mt of carbon for the entire district with 73% accuracy
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    ThesisItemOpen Access
    ASSESSMENT OF TREE DIVERSITY, PRODUCTIVITY AND CARBON SEQUESTRATION POTENTIAL OF DIFFERENT AGROFORESTRY SYSTEMS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-10-13) DODDABASAWA; Mahadeva Murthy, M.
    The present investigation ‘Assessment of tree diversity, productivity and carbon sequestration potential of different agroforestry systems’ was carried out during 2015-16 and 2016-17 in north eastern Karnataka covering six districts on farmers fields. Bund and boundary plantings were the major traditional agroforestry systems practiced by the farmers in both rainfed and irrigated ecosystems. Tree number varied with farm holding size and kind of agroforestry systems and was positively correlated. Shannon’s diversity index was higher with small farmer followed by medium and large farmer and mean number of species was more influenced by the prevailing ecological condition of the location. 27 tree species belonging to 15 plant families with 92.6 per cent being indigenous were recorded in rainfed ecosystem. Azadirachta indica was the most predominant species followed by Acacia nilotica, Ziziphus mauritiana and Tamarindus indicus. While under irrigated ecosystem, 52 tree species belonging to 25 families with 85 per cent being indigenous were dominated by Tectona grandis followed by Azadirachta indica and Cocos nucifera. The grain yields of pigeonpea in association with neem under rainfed ecosystem and teak under irrigated ecosystem were lower near the tree line at 5 m distance compared to at 10 m and 15 m distances, however, different agroforestry systems did not reveal significant variation in yield. In all, yield was lower in agroforestry systems compared to control. Nevertheless, positive influences of agroforestry system were visible on soil properties, energy use efficiency, carbon sequestration and carbon sustainability compared to food grain based system, and trees in agroforestry systems accounted for 50 to 70 per cent higher carbon sequestration than the conventional agriculture.
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    ThesisItemOpen Access
    STUDIES ON DECOMPOSITION OF LEAF LITTER AND NUTRIENT DYNAMICS OF Simarouba glauca AND Calophyllum inophyllum AGRO-FORESTRY TREE SPECIES
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2015-02-24) PRASANNA KUMARA, M; Hattappa, S
    Field experiment, “Studies on decomposition of leaf litter and nutrient dynamics of Simarouba glauca and Calophyllum inophyllum agro-forestry tree species” was conducted at GKVK, Bengaluru and ARS Hassan during winter and summer 2014-15. The experiment comprising of sixteen treatments consisting of two tree species, two depths, two locations in two seasons, laid out in factorial RCBD with three replications. The leaf litter production quantified for two seasons during winter and summer (November to April 2015) in Simarouba and Calophyllum at two locations revealed that the highest leaf litter fall was recorded during winter in Simarouba (24.33 kg tree-1 month-1) and lowest in Calophyllum (2.7 kg tree-1 month-1) during summer. The microbial activities showed significant differences at 90 days after leaf litter decomposition in two tree species. The urease (102.09 μg NH4 -1 g-1 soil 2hr-1), DHA (112.6 μg TPF g-1 soil day-1) and phosphatase (29.2 and 23.3 μg PNP g-1 soil) activity was recorded highest in Simarouba plantation compared to Calophyllum plantation. The available soil nutrients were significantly higher at 90 days after leaf litter decomposition in Simarouba plantation (N-193.8 kg ha-1, P-32.6 kg ha-1, K-362.6 kg ha-1 and S-29.7 ppm) compared to Calophyllum plantation (N- 174.5 kg ha-1, P-25.6 kg ha-1, K-246.41 kg ha-1 and S-24 ppm), respectively. The Simarouba tree species litter had a higher initial nutrient content and released its nutrients faster with higher proportion than the Calophyllum tree thus significantly higher soil fertility was obtained in Simarouba agro-forestry system.