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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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  • ThesisItemOpen Access
    Response of Greengram (Vigna radiata L.) to Soil and Foliar Application of Zinc Sulphate in A Vertisol of North Karnataka
    (University of Agricultural Sciences, Dharwad, 2017-07) Prashantkumar; Radder, B.M.
  • ThesisItemOpen Access
    Effect of Different Organics and Inorganics on Soil Properties and Yield of Rainfed Maize in a Vertisol
    (University of Agricultural Science, Dharwad, 2017-06) Kalappanavar, Deepa; Gali, S.K.
  • ThesisItemOpen Access
    Response of Okra (Abelmoschus esculentus L.) to Domestic Wastewater Irrigation and Fertilizer Levels in Red Sandy Loam Soil of Zone-8
    (University of Agricultural Science, Dharwad, 2017-07) Shivayya Hiremath Siddayya; Kuligod, V.B.
  • ThesisItemOpen Access
    Characterization and Classification of Soils of Nagaral-1 Micro-Watershed in Gadag Taluk, Karnataka
    (University of Agricultural Science, Dharwad, 2017-06) Mahesha I.R.; Patil, P.L.
    A study was undertaken to characterize, classify and map the soil resources of Nagaral-1 micro-watershed in northern dry zone of Karnataka in order to assess their land capability, irrigability and suitability for crops and also to assess soil fertility constraints. Soil survey was carried out during April 2016 using IRS P6, LISS-IV image and cadastral map. Based on soil heterogeneity, fourteen profiles were studied for the morphological, physical and chemical properties and classified using Soil Taxonomy as Entisols, Inceptisols and Vertisols. Eight soil series were identified and mapped into 11 mapping units by GIS technique. The identified land capability sub-classes are; IIIsf, IIIesf, and VIs and have been mapped and indicated that 90 per cent of total geographical area is cultivable. Soil suitability evaluation for irrigation showed that, 90 per cent of the cultivable area was moderately suitable for surface irrigation with limitation of texture and ESP. The study area was moderately (S2) suitable for crops like wheat and pearlmillet. Whereas, cotton, pigeonpea, bengalgram, groundnut, rose, jasmine, maize, chilli, sorghum, soybean, sunflower, pomegranate, mango, sapota, guava and tamarind were marginally suitable (S3) with limitations of soil pH and organic carbon. Citrus crop is currently not suitable (N1) with limitations of rainfall and fertility. Sixty eight surface soil samples were drawn from the study area and analyzed at UAS, Dharwad for their fertility status and mapped by GIS technique. The soil pH was strongly alkaline to very strongly alkaline and free from salinity. Soil organic carbon and available phosphorus content were low to medium. Available nitrogen was low and potassium was high. Available sulphur was medium to high in range. Boron was deficient to excess, copper and manganese were sufficient while, zinc and iron were deficient. The fertility constraints identified in the micro-watershed are organic carbon, available nitrogen, iron and zinc.
  • ThesisItemOpen Access
    Response of Maize (Zea mays L.) to Green Synthesized Zno Nanoparticles in a Calcareous Vertisol
    (University of Agricultural Science, Dharwad, 2017-07) Ajayan, Amrutha S.; Hebsur, N.S.
    A laboratory study was conducted at the Department of Soil Science and Agricultural Chemistry, UAS, Dharwad during 2016-17 to green synthesize zinc oxide nanoparticles (ZnO NPs) from analytical grade zinc nitrate using five different plant leaf extracts viz., calotropis, tea, neem, tulasi and datura. The green synthesized ZnO NPs were characterized for their size and shape. In UV-spectroscopy, absorbance peaks of particles ranged from 345-370 nm confirming their size in nano range. In particle size analyzer and scanning electron microscopy calotropis leaf extract synthesized nanoparticles recorded smallest size (79.6 nm) and datura the highest (497.4 nm). The shape ZnO NPs varied from rod to spherical. The chemical composition of green synthesized ZnO NPs was determined with energy dispersive atomic X-ray analysis which revealed that synthesized particles were not pure, but contains other elements from leaf extracts. A pot culture experiment was conducted with 12 treatment combinations and 60 days duration to study the response of maize to green synthesized ZnO NPs.The study revealed that foliar application of nano ZnO at lower concentrations of 250, 500 and 750 ppm (T7, T8 and T9, respectively) were very effective in enhancing growth and nutrients uptake by maize plants than the conventional zinc sulphate spray @ 0.5 per cent. The growth parameters such as plant height, leaf area, chlorophyll content and dry matter production recorded maximum for treatment which received nano ZnO spray @ 250 ppm. Treatments T8 and T9 were on par with T7. Nano ZnO spray at higher concentrations (@ 1,000, 1,500 and 2,000 ppm) reduced growth and nutrients uptake of maize compared to lower concentrations (250, 500 and 750 ppm) due to zinc toxicity.
  • ThesisItemOpen Access
    Quality and Yield of Byadgi Chilli (Capsicum annuum L.) as Influenced by Foliar Feeding of Calcium Nitrate in a Vertisol
    (University of Agricultural Science, Dharwad, 2017-07) Jadhav, Kavitha Pandu; Bidari, B.I.
    A field experiment was conducted during kharif 2016 in the farmer’s field at Agadi village (Tq: Hubli) in Dharwad district to investigate the “Quality and yield of Byadgi chilli as influenced by foliar feeding of calcium nitrate in a vertisol”. Experiment consisted of 12 treatments with three replications. Three foliar sprays of 1.5 per cent Ca(NO3)2 recorded highest fruit yield (21.76 q ha-1) followed by treatment that received one spray of 1.5 per cent Ca(NO3)2 at 45 DAT (21.38 q ha-1). Three foliar applications of 1.5 per cent Ca(NO3)2 recorded significantly highest colour value (280.22 ASTA units) and highest oleoresin content (20.39 %) which was on par with one foliar spray of Ca(NO3)2 (19.16 %) and 1.0 per cent on 75 DAT (16.98 %). Lowest flower drop (10.02 %) was recorded due to three foliar sprays of 1.5 per cent Ca(NO3)2 that was on par with one foliar spray given on 45 DAT as well as 60 DAT of same concentration. Uptake of calcium and magnesium were significantly influenced by foliar spray of Ca(NO3)2 and highest uptake was noticed due to three foliar applications of Ca(NO3)2 at 1.5 per cent. Nitrogen content of red fruit bears significant positive relationship with colour value (r= 0.681*) and oleoresin content (r=0.680*) while calcium content bears significant positive relationship with colour value (r=0.671*) and oleoresin content (r=0.768**). The B:C ratio was highest (5.98) due to three foliar application of Ca(NO3)2 at 1.5 per cent while lowest ratio (2.65) was in control. Foliar spray of 1.5 per cent Ca(NO3)2 is superior in improving the yield and quality of Byadgi chillies.
  • ThesisItemOpen Access
    Response of Groundnut (Arachis hypogaea L.) to Split and Foliar Application of Potassium in a Vertisol
    (University of Agricultural Science, Dharwad, 2017-08) Sanadi, Ummesalma; Math, K.K.
    A field experiment was conducted to investigate the response of groundnut (Arachis hypogaea L.) to split and foliar application of potassium in a Vertisol at the Main Agricultural Research Station, University of Agricultural Sciences, Dharwad during kharif, 2016. The experiment was laid out with twelve treatments replicated thrice in completely randomized block design. Pod yield in groundnut was not significantly influenced by different potassium nutrition treatments. However, split application of 150 per cent RDK, half as basal and half at 30 DAS through muriate of potash with 2 per cent foliar spray of potassium sulphate at 60 DAS recorded highest pod yield (3,617 kg ha-1) closely followed by basal application of 150 per cent RDK along with 2 per cent foliar spray of potassium sulphate (3,574 kg ha-1). Split application of 150 per cent RDK through MOP plus 2 per cent foliar spray of SOP at 60 DAS significantly enhanced the oil (47.84 %) and protein (37.98 %) contents in kernel with 6.07 and 6.89 per cent increase, respectively over control. Split and foliar application of potassium significantly increased the uptake of major nutrients. Split application of MOP to groundnut significantly enhanced pod yield and quality of groundnut. The pod yield and quality showed a significant positive correlation with the nutrient concentrations (N, P, K and S) in index leaves before and after foliar application of SOP. The treatment with 150 per cent RDK through muriate of potash in split application (half as basal + half at 30 DAS) plus 1 per cent foliar spray through potassium sulphate at 60 DAS recorded highest B:C ratio (2.65). Thus, split application of 150 per cent MOP + foliar spray of one per cent SOP at 60 DAS is beneficial over basal application of 100 per cent MOP.
  • ThesisItemOpen Access
    Studies on Soil Organic Carbon Fractions in Selected Cropping Systems of Zone Iii and Viii of North Karnataka
    (University of Agricultural Science, Dharwad, 2017-08) Sujatha H.N.; Yeledhalli, N.A.
    A study was carried out during 2016 to characterize soil organic carbon (SOC) fractions as influenced by different cropping systems using samples collected from twenty Agricultural Research Stations of University of Agricultural Sciences, Dharwad in Zone III and VIII of North Karnataka. Surface soil samples (0-20 cm) were collected from different cropping systems which included rice, maize, wheat, sorghum, soybean, groundnut, greengram, sugarcane and cotton crops. Samples were analyzed at the Department of Soil Science and Agricultural Chemistry, UAS, Dharwad for water soluble carbon, microbial biomass carbon, particulate organic carbon, readily oxidizable carbon and total organic carbon. Among the cropping systems, pulse based cropping system accounted for higher water soluble carbon (44.57 mg/kg), readily oxidizable carbon (8.38 g/kg), microbial biomass carbon (87.39 mg/kg) and total organic carbon (11.97 g/kg) and were lowest in rice based cropping system (8.96 g/kg ). Pulse based cropping system accounted for higher soil organic carbon because of high organic matter availability. The TOC was significantly and positively correlated with soil aggregate stability (0.408*), readily oxidisable carbon (0.448**), particulate organic carbon (0.708**), water soluble carbon (0.438**) and negatively correlated with bulk density (0.330**). Multiple regression analysis indicated that, in greengram based cropping system total organic carbon contributed only 90.40 per cent for soil aggregate stability, followed by maize based cropping system (80.40 %) and weakly correlated in rice based cropping system (55.00 %). Maximum correlation was observed between equivalent yield of different cropping systems and WSC (r=717**), followed by MBC (r=0.491*). Pulse based cropping systems enhances the labile organic carbon fractions. Rice based cropping systems had high recalcitrant organic carbon fraction.
  • ThesisItemOpen Access
    Influence of Sewage Irrigation on Yield and Quality of Green Chilli and Soil Properties
    (University of Agricultural Science, Dharwad, 2017-07) Sindhu B.C.; Hebbara, M.
    A field experiment to study the influence of sewage irrigation and NPK levels on yield and quality of green chilli and soil properties was conducted at the Main Agricultural Research Station, UAS, Dharwad during summer 2016. It was laid-out in split-plot design with four main plots viz., S1- Domestic sewage water (DSW); S2- Treated sewage water (TSW); S3- Groundwater (GW) and S4- Domestic sewage water alternated with groundwater (DSW-GW) and five sub-plots viz., F1- Absolute control; F2- 25 % NPK; F3- 50 % NPK; F4- 75 % NPK; F5- 100 % NPK. Growth parameters were significantly higher under DSW + 100 % NPK. Yield (10.47 t ha-1) and yield attributes were significantly higher under DSW + 100 % NPK. Irrigation with DSW + 75 % NPK (9.73 t ha-1) was on par with the former followed by DSW-GW + 100 % NPK (9.18 t ha-1). Quality parameters like total chlorophyll, ascorbic acid, total sugars and total ether extract of chilli fruit were higher under DSW + 100 % NPK which remained on par with DSW + 75 % NPK and DSW-GW + 100 % NPK. Higher N, P, K, S, Fe, Mn, Zn and Cu concentration in chilli fruit and plant and their uptake was observed under DSW + 100 % NPK. Irrigation with DSW improved aggregate stability, reduced BD and increased MWHC. Higher soil available N, P2O5, K2O, S and B were observed under DSW + 100 % NPK. Whereas, higher micronutrient concentration was observed under DSW without fertilizer application. Dehydrogenase activity was higher under DSW + 25% NPK. Higher gross returns (` 5,76,125 ha-1), net returns (` 4,17,607 ha-1) and B:C (4.80) were observed under DSW + 100 % NPK. Chilli irrigated with domestic sewage water, only 75 % NPK was enough underlining a saving of 25 % of inorganic fertilizer.