Loading...
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.
Browse
11 results
Search Results
ThesisItem Open Access Effect of Magnetic Treatment on Irrigation Water Quality, Soil Properties and Growth of Sunflower Corp(UAS, Dharwad, 2013) Ashwini H. Gudigar; Manjuunatha HebbaraExperiments were conducted to study the effect of magnetic treatment on irrigation water quality, soil properties, leaching efficiency of salts and growth of sunflower crop during 2011- 2012 at College of Agriculture, UAS, Dharwad. Four separate experiments were conducted to achieve the objectives. Irrigation waters with different salinity levels of i.e., 2, 4, 6, 8, 12 and 16 dS m-1 were obtained by equilibrating natural saline soil with good water in the ratio of 1:3 and used in the studies along with GW (0.6 dS m-1). For magnetic treatment, the waters were passed though the magnetic device as required for each study. The one-time magnetic treatment of irrigation water significantly decreased electrical conductivity but the effect on pH was variable. With multiple magnetic treatments, the difference between treated and untreated became increasingly narrow. The calcium, magnesium, sodium and sodium adsorption ratio also followed the same trend. The magnetic treatment also had mollifying effect on residual sodium carbonate of water. In general, the decrease was of higher magnitude at lower level of water salinity. Intermittent irrigation with magnetized water significantly decreased soil pH but increased soil salinity. Soil exchangeable calcium, sodium and exchangeable sodium percentage decreased due to irrigation with magnetized water. Soil water soluble calcium, magnesium and sodium decreased due to magnetized water irrigation. The magnetic treatment significantly decreased the dispersible clay content over non-magnetized water use. Leaching a saline soil with magnetized water removed more salts from the soil compared to leaching with non-magnetized water. Soils leached with magnetized water had significantly higher leachate salinity and lower soil salinity compared to leaching with nonmagnetized water. The magnetic treatment significantly increased germination percentage, plant height and dry matter yield in sunflower over non-magnetized water use. The magnetic treatment increased the K/Na ratio and improved its salt-tolerance.ThesisItem Open Access Effect of organic and Inorganic Sources of Nutrients on soil Fertility and Yield of Brinjal (Solanum melongena L.)(UAS, Dharwad, 2013) Javed U. Mujawar; K. K. MathA field experiment was conducted to investigation “The effect of organic and inorganic sources of nutrients on soil fertility and yield of brinjal” during kharif 2010 at the MARS, UAS, Dharwad. The experiment was laid out in Typic Haplustert under irrigation in RBD with nine treatments replicating thrice. The treatments included were RDF with and without FYM, 100 and 75 per cent organics, INM (50% organics + 50% inorganic fertilizers) and liquid organics like beejamrutha, jeevamrutha and panchagavya alone and in combination with above treatments except RPP and RDF. The results revealed that the treatment with RDF+FYM recorded significantly higher fruit yield (5.24 t ha-1) and it was on par with RDF and organics and chemical fertilizers applied each at 50 per cent level either alone or with liquid organics. The uptake of nutrients like nitrogen, phosphorus, potassium and sulphur and micronutrients namely copper, iron, manganese and zinc increased significantly due to application of part of recommended nitrogen through organics. The available nitrogen, phosphorus, potassium and sulphur and DTPA extractable micronutrients namely copper, iron, manganese and zinc status of soil was significantly influenced by the application of chemical fertilizers along with organics and the maximum values were recorded in the treatment receiving RDF+FYM. Dehydrogenase enzyme activity in soil was higher in the treatments with FYM and vermicompost applied along with chemical fertilizers and the highest value was recorded in the treatment receiving RDF+FYM (40.90 ıg TPF/g soil/day). Thus, the study emphasizes that in brinjal cultivation, chemical fertilizers can be substituted with FYM and vermicompost without losing appreciable fruit yield. This also improves the soil fertility and quality of fruit in addition to saving 50 per cent cost on chemical fertilizers. The findings assume greater significance in the present context where in the development of multi-nutrients deficiency in soil and scaling up of the cost of chemical fertilizers severely limiting crop productivity.ThesisItem Open Access Studies on the use of Spentwash as A Source of Potassium on Maiza Productivity and Soil Properties(UAS, Dharwad, 2013) Ravindra V. M; K. K. MathA field investigation on “Studies on the use of spentwash as a source of potassium on maize productivity and soil properties” was conducted in sandy clay loam soil in the farmer’s field at Sameerwadi during kharif 2012. The experiment was laid out in randomized block design with seven treatments replicated four times. The recommended dose of potassium (RDK) to maize was substituted with spentwash at 0, 25, 50, 75, 100, 150 and 200 per cent levels. The bio-methanated spentwash used for the study was neutral in reaction with high soluble salts content. Application of spentwash to maize to substitute 50 per cent RDK significantly improved growth and yield attributing characters when compared to its application at higher levels but was on par with application of only chemical fertilizer. Application of spentwash in conjunction with potassic fertilizer at 50 per cent level produced 7.3 t ha-1 of grain yield and it was on par with the treatment receiving RDK only through chemical fertilizer and the treatment with 25 per cent substitution of RDK with spentwash but significantly superior to the treatments receiving higher levels of spentwash. The uptake of nutrients by the crop was significantly increased with the use of two sources of potassium each at 50 per cent level when compared to the treatments receiving 100, 150 and 200 per cent RDK only with spentwash but it was on par with the treatment receiving only chemical fertilizer and the treatment with 25 per cent substitution of RDK with spentwash. Application of distillery spentwash at different levels caused improvement in soil physical environment, organic carbon, available nutrients status and dehydrogenase enzyme activity in the soil. However, its addition to soil also resulted in build up of total soluble salts content in soil which is undesirable. Combined application of spentwash and potassic fertilizer in 1:1 ratio was better as indicated by higher B:C ratio than the treatment receiving only potassic fertilizer.ThesisItem Open Access Response of Maize (Zea mays L.) to Graded Doses of Nitrogen Under Varying Levels of Soil Salinity in Vertisol of Ghataprabha Command Area(UAS, Dharwad, 2013) Rajesh Rawal; V.B. KuligodA field experiment was conducted to study the influence of graded doses of nitrogen on maize under varying levels of soil salinity in Roogi village of Mudhol taluk during kharif 2012. The experiment comprised of four salinity levels and four nitrogen levels. Growth parameters and yield attributing parameters were found significantly higher at lower salinity level of < 2 dSm-1. Treatment receiving 225 kg N ha-1 had better growth over the treatment receiving 150 kg N ha-1. Crop growth was not influenced by higher doses of nitrogen under saline conditions (> 4 dSm-1). The highest crop yield of 8.31 t ha-1 was observed under < 2 followed by 2-4 dSm-1. Application of increased level of nitrogen resulted significant increase in yield. Application of 225 kg N ha-1 (6.74 t ha-1) recorded maximum yield. Higher doses of nitrogen application under saline condition (> 4 dSm-1) did not enhance the crop yield. Reduction in NPK uptake was recorded with the increase in soil salinity. Application of 225 kg N ha-1 recorded the maximum NPK uptake. The K/Na ratio decreased with increasing salinity and the highest K/Na ratio of 50.0 was found at 225 kg ha-1 N application under < 2 dSm-1 salinity. Available NPK content was maximum at salinity level < 2 dSm-1 and the lowest was at 6-8 dSm-1. Increased soil salinity decreased grain protein content but starch content increased with the increase in soil salinity. The highest protein content was recorded at salinity level < 2 dSm-1. Increased soil salinity registered decrease in the net returns. The higher net returns and B:C ratio was obtained at salinity level < 2 dSm-1.ThesisItem Open Access Studies on Ferrous Sulphate and Zinc Sulphate Application on Yield and Quality of Byadgi Chillies in Calcareous Vertosol of Northern Transitional Zone of Karnataka(UAS, Dharwad, 2013) Suchithra C. K.; B. I. BidariA field experiment was conducted during kharif 2012 in the farmer’s field at Agadi village in Dharwad district to study the “Response of Byadgi chillies to ferrous sulphate and zinc sulphate application in calcareous Vertisol in northern transitional zone of Karnataka”. The experiment consisted of ten treatments with three replications. Results showed that application of ferrous sulphate @ 25 kg ha-1 to soil on 30th DAT+foliar spray of 0.5 percent ferrous sulphate on 60th and 90th DAT recorded highest fruit yield (17.17 q/ha) closely followed by treatment that received soil + foliar application of zinc sulphate (16.60 q/ha). Ferrous sulphate applied treatments recorded comparatively higher fruit yield than zinc sulphate applied treatments. Highest colour value (274.23 ASTA units) and oleoresin content (18.07%) in red chillies were recorded with soil (25 kg/ha)+foliar (0.5%) application of ferrous sulphate. Foliar spray of zinc sulphate (0.5%) on 60th and 90th DAT produced minimum per cent discoloured fruits (5.26%) and treatments receiving only ferrous sulphate application recorded comparatively higher discoloured fruits than treatments receiving zinc sulphate application (T3 and T5). Control recorded maximum per cent discoloured fruits (6.12%). Combined foliar spray of ferrous sulphate and zinc sulphate (each 0.5%) at 60 and 90 DAT resulted in marginal decreased colour value (230.11 ASTA units) but numerical increase in discoloured fruits (5.54%) compared to individual foliar spray. Highest iron (196.63 mg/kg) and zinc (86.59 mg/kg) contents in red fruits were noticed in treatments receiving soil+foliar application of ferrous sulphate (T6) and zinc sulphate (T7) respectively. Potassium content of whole red fruits had a significant positive correlation with colour value (0.79**) and oleoresin content (0.81**). Iron and zinc contents of whole red fruits were positively correlated with colour value (0.65* and 0.63* for iron and zinc, respectively). Zinc content of whole red fruit possessed significant negative relationship with per cent discoloured fruits (-0.84**). Per cent discoloured fruits possessed significant positive relationship with leaf nitrogen content (0.66*), while potassium, iron and zinc contents possessed significant negative relationship. Highest B:C ratio (5.31) was obtained due to soil + foliar application of ferrous sulphate (T6).ThesisItem Open Access Response of Maize to Long Term Biomethanated Spentwash Application Under Vertisols of Northern Transition Zone of Karnataka(UAS, Dharwad, 2013) Rubeena C. M; V. B. KuligodA field experiment was conducted in the long-term trial on distillery spentwash application established since 2003 at the Main Agricultural Research Station, UAS, Dharwad. The study was carried out during kharif 2012 to know the response of maize to long-term biomethanated spentwash application under Vertisols of Northern transition zone of Karnataka. Experiment consisted of seven treatments and 3 replications. Results revealed that long-term application of 1½ recommended nitrogen through spentwash was superior with respect to the growth parameters like plant height, chlorophyll content and dry matter production and yield parameters like cob length, cob circumference, cob weight, number of rows per cob, number of seeds per row, number of seeds per cob and test weight. Both growth and yield parameters complemented each other in realising higher grain and stover yield. Spentwash application had also increased the nutrient uptake by the maize. Long-term application of spentwash improved the physico-chemical properties of the soil. Application of spentwash to supply 1½ recommended nitrogen significantly reduced the soil bulk density and increased porosity, aggregate stability and maximum water holding capacity. The soil reaction and soluble salts were not adversely affected by the long-term application of spentwash. Soil salinity remained within the critical limit of four dSm-1 even after nine years of spentwash application. The available nutrient status of soil was found to be higher in the plots applied with 1½ recommended dose of nitrogen through spentwash. The soil dehydrogenase and phosphatase enzyme activities increased due to the long-term spentwash application. Application of distillery spentwash to supply 1½ times recommended nitrogen recorded the highest net returns and B:C ratio.ThesisItem Open Access Studies on Phosphorus Status of Vertisols and Response of Bt Cotton to Phosphatic Fertilizers in Northern Transitional Zone of Karnataka(UAS, Dharwad, 2013) Ramya S.H.; N.S. HebsurAn investigation was carried out to study the available phosphorus status, distribution of different fractions of phosphorus and response of Bt cotton to applied phosphatic fertilizers in Vertisols (0-30 cm) having P status below and above 33.50 kg P2O5 per ha in the farmer’s fields of cluster of villages of Dharwad district viz., Sulla, Byahatti, Kusugal, Hebsur, Ingalalli, Kiresur, Rottigwad, Siraguppi, Bandiwad and Dattur. Soils were alkaline (7.10 to 8.94), non saline (0.06 to 0.40 dS/m), calcareous (55 to 245 g/kg), low to medium in available nitrogen (94 to 344 kg/ha), phosphorus (15.5 to 39.50 kg/ha) and sulphur (10.20 to 31.5 kg/ha) and medium to high in potassium (310 to 635 kg/ha). Among the different inorganic forms of P, Ca-P was the dominant fraction which ranged from 40.40 to 63.56 ppm and contributed about 9.57 to 24.41 per cent to total–P whereas, saloid-P was the smallest fraction which ranged from 1.30 to 3.95 ppm contributing about 0.39 to 1.05 per cent to total-P. The dominance of different P fractions in these soils followed the order: Ca-P > Red-P > Al-P > Occl-P > Fe-P > Saloid-P. Ca-P had positive and significant correlation with pH (r=0.928**), EC (r= 0.371**) and calcium carbonate (r=0.969**). Saloid-P had positive and significant correlation with organic carbon and all the P forms except Ca-P. Average P concentration in petiole and whole plant, total P uptake and yield of Bt cotton obtained in the farmer’s fields of different villages followed the order Bandiwad > Rottigwad > Kusugal > Hebsur > Dattur > Byahatti > Kiresur > Sulla > Ingalalli > Siraguppi. Response of Bt cotton (988 kg/ha) to applied phosphatic fertilizer was poor in Vertisols having P2O5 > 33.50 kg ha-1. However, a good yield (1090 kg/ha) response to applied fertilizers was observed in low P status soils.ThesisItem Open Access Effect of Foliar Nutrients on Yield, Quality and Nutrient Uptake by Soybean [Glycine max (L). Merill](UAS, Dharwad, 2013) Saravana Kumar V.; N.A. YeledhalliA field experiment was conducted at Main Agricultural Research Station (MARS), University of Agricultural Sciences, Dharwad during kharif 2012 to study the effect of foliar nutrients on yield, quality and nutrient uptake by soybean. The experiment was laid out in randomized complete block design (RCBD) with three replications and nine treatments. The soil of the experimental site was clay in texture, pH was 8.20, EC of 0.12 dS m-1, available nitrogen, phosphorus, potassium and sulphur was 219.6, 34.08, 376.3 and 12.4 kg ha-1 respectively and hot water soluble boron was 0.52 mg kg-1 and the organic carbon was 0.75 per cent. Foliar application of soluble starter NPK @ 2 per cent + sulphur spray @ 2 per cent at 45 DAS and soluble booster NPK @ 2 per cent + boron spray @ 0.15 per cent at 65 DAS resulted in significantly higher seed yield (33.84 q ha-1) which was 48 per cent higher than the control receiving only water spray. This treatment was also on par with the foliar application of boron @ 0.15 per cent at initial pod initiation stage (31.95 q ha-1). The increase in yield was due to enhanced yield contributing components viz., more nodes, flower, seed test weight, higher dry matter production and its efficient distribution. Further, oil content, oil yield, protein content, N, P, K uptake and net returns were higher with the foliar application of soluble starter, booster dose of NPK, sulphur and boron individually or in combination at different stages. However, the higher benefit:cost ratio was with the foliar application of boron @ 0.15 per cent at initial pod initiation stage. The study clearly indicates that the foliar application of nutrients play a key role in achieving more nodes, retain flower, develop the pod, increase test weight and quality of soybean.ThesisItem Open Access Reponse of Chickpea (Cicer Arietinum) to Identified Micronutrients Constraints under Vertisol of Malaprabha Command Area In Karnataka(UAS, Dharwad, 2013) Mahantesh S. Karajanagi; P.L. PatilA study was undertaken to identify micronutrients constraints using GIS technique in Vertisols of Dundur village under of Malaprabha Command area, Karnataka and response of chickpea crop to identified micronutrients constraints. Surface soil samples collected at 200 m grid interval were analyzed for pH, EC, CaCO3, OC, N, P, K, S, Zn, Fe, Cu, Mn and B and mapped by GIS technique. Soil fertility maps revealed that, major portion of the study area was deficient in available N, P, S, Zn, Fe and B with higher `level of available K, Cu and Mn. The results on field experiment with chickpea as test crop revealed that, application of FeSO4 + ZnSO4 each @ 25 kg ha-1 + Borax @ 5 kg ha-1 along with recommended dose of fertilizer (RDF) recorded the highest plant height, number of branches and dry matter production at all the growth stages followed by FeSO4 + ZnSO4 each @ 10 kg ha-1 + Borax @ 2.5 kg ha-1 along with RDF. The yield, yield components and crude protein content were also significantly superior over all other treatments with the application of FeSO4 + ZnSO4 each @ 25 kg ha-1 + Borax @ 5 kg ha-1 along with RDF. Application of FeSO4 + ZnSO4 each @ 25 kg ha-1 + Borax @ 5 kg ha-1 along with RDF recorded significantly higher total uptake of N, P, K, S, Zn, Fe and B by chickpea. There was improvement in available Fe, Zn and B status in soil after harvest of crop due to application of FeSO4 + ZnSO4 each @ 25 kg ha-1 + Borax @ 5 kg ha-1. The higher additional benefit was also realized with the application of FeSO4 + ZnSO4 each @ 25 kg ha-1 + Borax @ 5 kg ha-1 compared to all the other treatments.