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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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20073
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Subject: Soil Science and Agricultural Chemistry × Start date: 2007 × End date: 2007 ×
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Now showing 1 - 3 of 3
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    ThesisItemOpen Access
    Intergrated nitrogen management in maize (Zeamays L.) in a vertisol of malaprabha command area
    (UAS, Dharwad, 2007) N.Mamatha; H.T.Channal
    yield and certain quality parameters of cotton in vertisol, under irrigated condition during kharif 2006-07, at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad. The experiment consisted nine treatments with three replications and was laid out in randomized block design. The results indicated that different levels of sulphur, iron, zinc and their combination significantly increased the seed cotton yield, ginning percentage and seed index. Among the sulphur levels (as factomphos), application of 50 kg S per ha, recorded the highest seed cotton yield (19.50 q/ha), ginning percentage (43.00%) and seed index (9.10) and were par with the 25 kg S per ha and was significantly superior over control. Among the iron levels (as FeSO4), application of 50 kg Fe per ha recorded the highest seed cotton yield (18.50 q/ha), ginning percentage (39.10%) and seed index (9.00) and was significantly higher over control. Among the levels of zinc (as ZnSO4) application of 50 kg Zn per ha, recorded the highest seed cotton yield (20.50 q/ha), ginning percentage (39.50%) and seed index (9.10) and on par with application of 25 kg per ha and was significantly superior over control. Combined application of sulphur, iron and zinc each at 50 kg per ha (T9) recorded the highest seed cotton yield (98.50 q/ha), ginning percentage (43.00%) and seed index (9.81) which were on par with treatment (T8) receiving sulphur, iron zinc each at 25 kg per ha and was significantly higher over rest of the treatments. The treatment T9 recorded the highest nutrient uptake (N, P, K, S, Fe and Zn) and on par with the treatment T8 and was significantly superior over rest of the treatments. Further, combined application of sulphur, iron and zinc each at 25 kg per ha recorded the highest B:C ratio of 2.51 and net returns of Rs.33,396 proved to be economically more feasible.
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    ThesisItemOpen Access
    Response of maize (zea mays l.) to ferti-irrigation of spentwash
    (UAS, Dharwad, 2007) Tara Devi Bhukya; S.G.Patil
    A field experiment was conducted at the Main Agricultural Research Station, University of Agricultural Sciences, Dharwad during kharif, 2006 to study the response of maize to ferti-irrigation of spentwash. The design adopted was Randomized Block Design with seven treatments replicated thrice. In the investigation spentwash was included as a replacement for chemical fertilizer. It was used on the basis of nitrogen requirement and applied as recommended. Spentwash application improved all the growth parameters including plant stand, leaf number, leaf area, chlorophyll content etc. Spentwash had a significant effect on most of the yield parameters. Both growth and yield parameters complemented each other in realizing higher fodder and grain yield. Application of spentwash at the recommended N level remained comparable with chemical fertilizer providing on opportunity of substituting. The economics of crop cultivation was significantly in favour of spentwash rather than chemical fertilizer as it resulted in direct saving of fertilizer cost. Spentwash application at the recommended level (N requirement) did not affect the soil properties. Both pH and EC remain unaffected although a marginal increase in conductivity and organic carbon, available N, P were observed but increase in K was perceptible with no impending immediate ionic interaction when applications are not repeated beyond three seasons. Spentwash application had a favourable effect on pH, conductivity, available nutrients and did not favour their accumulation. Spentwash helped in better nutrition as it also supplemented micronutrients. It did not suppress biological activity and no significant changes was observed in them due to spentwash use.
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    ThesisItemOpen Access
    Studies on distribution and transformation of soil zinc and response of rice to nutrients in traditional and system of rice intensification (sri) methods of cultivation
    (UAS Dharwad, 2007) M.D.Iranie Wijebandara; G.S.Dasog
    A study was conducted on the “Distribution and transformation of soil zinc and response of rice to nutrients in traditional and System of Rice Intensification (SRI) methods of cultivation”. Soil samples were analysed from paddy growing areas of Gangavati taluk in Northern Dry zone (zone 3) and Hangal taluk in Hilly zone (zone 9) of Karnataka to find out the distribution of zinc fractions and their relationship with soil properties. The order of magnitude of different zinc fractions was water soluble plus exchangeable zinc < organically bound zinc < crystalline sesquioxide bound zinc < amorphous sesquioxide bound zinc < manganese oxide bound zinc < residual zinc. An incubation study was conducted in the laboratory to know the transformation of applied zinc (10 kg ZnSO4 and 25 kg ZnSO4 ha-1) in Gangavati and Hangal soils under field capacity and submergence moisture regime for 120 days. Water soluble plus exchangeable, organically bound and crystalline sesquioxide bound forms of Zn showed a decrease and manganese oxide bound, amorphous sesquioxide bound and residual forms of zinc showed an increase with increase of incubation period in both moisture regimes. Hence, the magnitude of decrease and increase was more under submergence than field capacity moisture condition. A field experiment was carried out on a Calciustert to know the response of rice to different methods of cultivation and nutrient levels. Significantly taller plants with higher number of tillers and higher dry matter production were noticed in SRI method of cultivation at all the growth stages as compared to traditional method. SRI method recorded significantly higher yield attributes and grain and straw yield compared to traditional method of cultivation. Significantly higher concentration and uptake of plant N, P, K and Zn and residual available N, P, K and Zn in soils were recorded in SRI method as compared to traditional method. Application of 75 per cent RDF + biofertilizers with 25 kg ZnSO4 per ha resulted in significantly taller plants, higher number of tillers, higher dry matter and higher grain and straw yield and yield attributes. Significantly higher concentration and uptake of plant N, P, K and Zn and residual available N, P and Zn in soil were recorded in treatment receiving 75 per cent RDF + biofertilizers with 25 kg ZnSO4 per ha. The 75 per cent RDF + biofertilizer with 25 kg ZnSO4 per ha under SRI method of cultivation was found to be the best treatment which recorded the highest yield of rice.