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Open Access
Effect of Nitrogen Levels and Modified Urea on Growth, Yield and Nitrogen use Efficiency in Rainfed Pearl Millet [Pennisetum glaucum (L).]
(University of Agricultural Sciences, Dharwad, 2017-06) Ganapati
A field experiment was conducted to study the effect of nitrogen levels and modified urea on growth, yield and nitrogen use efficiency in rainfed pearl millet during kharif 2016 at Regional Agricultural Research Station, College of Agriculture, Vijayapura, UAS, Dharwad. There were 15 treatment combinations involving three nitrogen levels viz., 25, 50 and 75 kg ha-1 and five modified ureas viz., neem coated, tar coated, sulphur coated, vermicompost coated and normal urea. The experiment was laid out in factorial randomised block design with three replications. The results indicated that, application of 75 and 50 kg N ha-1 were at par and recorded significantly higher grain (2,878 and 2,730 kg ha-1, respectively) and stover yields (5.32 and 5.15 t ha-1, respectively) compared to 25 kg N ha-1(2,296 kg ha-1 and 4.00 t ha-1, respectively). Application of neem coated urea recorded significantly higher grain (2,965 kg ha-1) and stover yields (6.13 t ha-1) to normal urea. Net income and benefit cost ratio were higher with application of 75 kg N ha-1 (Rs. 28,815 ha-1 and 2.91, respectively) compared to 25 kg N ha-1 (Rs. 21,366 ha-1 and 2.57, respectively), however it was at par with 50 kg N ha-1 (Rs. 27,517 ha-1 and 2.90, respectively). Among the modified ureas, neem coated urea recorded significantly higher net income (Rs. 32,316 ha-1) and benefit cost ratio (3.32) compared to normal urea (Rs. 23,817 ha-1 and 2.69, respectively) and other modified ureas. Application of 50 kg N ha-1 with neem coated urea was found to be optimum in pearl millet crop to achieve higher grain yield, stover yield and economic returns.
Open Access
Soil and Foliar Nutrient Management in Bt and Non-Bt Cotton Genotypes Under Protective Irrigation
(University of Agricultural Sciences, Dharwad, 2017-06) Santhosha K.R.; Hosmath, J.A.
Open Access
Standardization of Fertigation Schedule in Transplanted Onion (Allium cepa L.)
(University of Agricultural Sciences, Dharwad, 2017-07) Narendra. M.S.; Wali, S.Y.
Open Access
Crop Diversification and Intensification for Higher Productivity and Profitability in Transplanted Pigeonpea
(University of Agricultural Sciences, Dharwad, 2017-06) Sujatha, H.T.; Babalad, H.B.
Open Access
Productivity of Mungbean as Influenced by Nutrient Ratios of Nitrogen and Phosphorous During Kharif in Northern Transition Zone of Karnataka
(University of Agricultural Science, Dharwad, 2017-11) Adarsh B.K.; Malligawad, Lokanath H.
Open Access
Response of Sesame (Sesamum indicum L.) to Planting Geometry and Foliar Nutrition During Summer
(University of Agricultural Science, Dharwad, 2017-07) Ananda V.; Pattar, P.S.
The field experiment was conducted to study the Response of sesame to planting geometry and foliar nutrition during summer 2016 at the Agriculture Research Station, Bagalkot, University of Agricultural Sciences, Dharwad. The treatments comprised of four planting geometries (30 cm ×15 cm, 30 cm × 20 cm, 45 cm × 10 cm and 45 cm × 15 cm) and three foliar nutrition (19: 19: 19 water soluble fertilizer at 0.5, 1.0 per cent and control). The experiment was laid out in Randomized Complete Block Design with factorial concept in three replications. Spacing of 45 cm × 10 cm (2,22,222 plant ha-1) recorded significantly higher seed yield (1,003 kg ha-1) while wider spacing of 45 cm × 15 cm (1,48,148 plants ha-1) recorded higher light transmission ratio, chlorophyll content, leaf area, number of branches, total dry matter per plant and yield attributes compared to the other narrow spacing. Foliar application of 1.0 per cent water soluble NPK recorded significantly higher seed yield (940 kg ha-1), stalk yield, number of branches per plant, total dry matter per plant, chlorophyll content, leaf area, yield attributes and seed protein content compared to other foliar nutrition treatments. The treatment combination 45 cm × 10 cm spacing with foliar application of 1.0 per cent water soluble NPK (19:19:19) recorded significantly higher seed yield (1,031 kg ha-1), uptake of N, P, and K, gross returns (Rs. 69,044 ha-1), net returns (Rs. 49,915 ha-1) and benefit cost ratio (3.70) compared to other treatment combinations.
Open Access
Sulphur and Boron Nutrition in Niger (Guizotia abyssinica Cass.)
(University of Agricultural Science, Dharwad, 2017-08) Gundagavi, Praveen M.; Rajkumara S.
A field experiment was conducted during kharif 2016 at the Main Agricultural Research Station, Dharwad to study the effect of sulphur and boron nutrition in niger. The experiment was laid out in spilt plot with three replications. Main treatments consisted of sulphur applications @ 0, 10 and 20 kg ha-1 alone and sulphur @ 10 and 20 kg ha-1 with sulphur oxidizing biofertilizer (Thiobacillus thiooxidans). Three subplot treatments foliar application of solubor (0.2 %) at branching, branching and flowering along with control were tried. Application of 20 kg sulphur ha-1 with sulphur oxidizing biofertilizer recorded higher seed yield of niger (628 kg ha-1). Niger seed yield was increased by foliar spray of solubor at branching and flowering (597 kg ha-1) over no foliar spray (510 kg ha-1) and the increase was by 17 per cent. Application of 20 kg sulphur ha-1 with sulphur oxidizing biofertilizer along with foliar spray of solubor (0.2 %) at branching and flowering recorded higher seed yield (683 kg ha-1) and it was on par with 10 kg sulphur ha-1 with sulphur oxidizing biofertilizer along with foliar spray of boron at branching (630 kg ha-1). Better growth parameters such as leaf area, leaf area index and total dry matter and yield attributes like number of capitulum per plant, seed yield per plant and 1000 seed weight of niger contributed for higher yield. Increased oil content (40.08 %) and oil yield (273.02 kg ha-1) were also observed in these treatments. This also resulted in higher net returns of niger (₹ 28,326 ha-1) with B: C ratio of 2.66. However, it was on par with 10 kg sulphur ha-1 with sulphur oxidizing biofertilizer along with foliar spray at branching resulted in net returns of ₹ 26,250 ha-1 with B: C ratio (2.68).
Open Access
Influence of Irrigation Levels and Water Soluble Fertilizers on Growth, Yield and Water Productivity of Sunflower
(University of Agricultural Science, Dharwad, 2017-08) Mohapatra, Sabya Ranjan; Angadi, S.S.
A field experiment was conducted to study the influence of irrigation levels and water soluble fertilizers on growth, yield and water productivity of sunflower at the Main Agricultural Research Station, University of Agricultural Sciences, Dharwad during summer 2016. The experiment consisted of three irrigation levels as main plot (I1: Irrigation based on moisture depletion levels, I2: Irrigation based on critical stages and I3: Farmers practice of irrigation-once in 10 days interval) and four foliar nutrition levels as subplot (F1: 1.5 per cent 19:19:19 + RDF, F2: 2.0 per cent 19:19:19 + RDF, F3: 2.5 per cent 19:19:19 + RDF and F4: 3.0 per cent 19:19:19 + RDF) with one control (irrigation once in 15 days with RDF) and laid out in split-plot design with three replications. The experimental results revealed that, I1 recorded higher grain yield (2,067 kg ha-1) and 100 seed weight (4.33 g) over other levels. Among foliar spray, F2 recorded significantly higher grain yield (2,166 kg ha-1) and 100 seed weight (4.35 g). The total water requirement of sunflower under moisture depletion levels, critical stages of irrigation, farmers practice of irrigation and irrigation once in 15 days were 382, 372, 412 and 432 mm respectively. Irrigation scheduled at moisture depletion levels recorded significantly higher gross return ( 78,559 ha-1) and net return ( 50,043 ha-1) as compared to other levels. However, spraying of 19:19:19 at 2.0 per cent with RDF recorded significantly higher gross return ( 82,300 ha-1) and net return ( 54,367 ha-1). Control plot receiving RDF with irrigation interval once in 15 days was inferior than the rest of the treatment combinations. Scheduling of irrigation based on moisture depletion (I1) with foliar application of 19:19:19 at 2 per cent with RDF (F2) was found suitable for summer sunflower.
Open Access
Performance of Maize Hybrids for the Current and Rising Temperature Scenarios: Dssat Model Based Assessment
(University of Agricultural Science, Dharwad, 2017-08) Pradeep M.G.; Patil, R.H.
A study to assess the 21 private and 15 public maize hybrids grown under potential condition was conducted during kharif 2016 at the Main Agriculture Research Station, University of Agricultural Sciences, Dharwad. The experiment was laid out in randomised complete block design replicated twice. Detailed phenology and yield traits were recorded and the data was used in DSSAT model for calibration. The highest grain yield among the private hybrids was recorded by DKC-9141 (11,492 kg ha-1) which was 19.8 % higher than the best among public hybrid GH-15305 (9,227 kg ha-1). The lowest yield of 6,631 kg ha-1 was recorded by a public hybrid GH-1314 which was 22.1 % lower than the lowest private hybrid NMH-145 (8,511 kg ha-1). Genetic coefficients of all hybrids within CERES-Maize model were optimized and the calibrated model was further used to quantify the impact of rise in temperature on maturity and yield of maize hybrids using historic weather as baseline (1985-2016) and by creating scenarios of + 1 and + 2 °C over baseline. The reduction in mean yield of private hybrids as compared to baseline was to the tune of 5.74 and 11.38 %, whereas for public hybrids it was 5.77 and 12.08 % when temperature was increased by + 1 and + 2 °C, respectively. Sowing window was optimized as one of the adaptation strategies for both current and elevated temperature scenarios. Six dates of sowing at fortnightly interval between June and August were used. Simulations under potential conditions showed that late sowing (August) was better over June and July sowing. Late sowing recorded 19.37, 13.84 and 7.76 % and 15.54, 10.87 and 5.14 % higher yield for private and public hybrids for baseline, +1 °C and +2 °C climate scenarios, respectively, over the crop sown during I FN of June.

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