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N. Mamatha ¹, B. I. Bidari ¹, G. B. Shashidhara ², H. T. Channal ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Agronomy, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN

Abstract

In a field experiment conducted on a Typic Chromustert at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad, the yield of cotton was significantly influenced by the different levels and combined application of sulphur, iron and zinc. The treatment that received combined application of sulphur, iron and zinc each at 50 kg per ha recorded the highest seed cotton yield (25.12 q/ha), higher ginning percentage (43.00%) and seed index (9.81 g).

Keywords

Seed Index, Ginning Percentage, Micronutrients, Seed Cotton Yield.

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Harinadh Babu Bokkisam ¹, H. T. Channal ², B. I. Bidari ³, G. B. Shashidhara ⁴

Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Directorate of Extension, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
3 Department of Soil Sciences, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
4 Department of Agronomy, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN

Abstract

Field experiment was conducted during kharif 2005 to find out the effect of N and K ratio on yield and economics of chilli cv. BYADGI. The results revealed that application of 200:75:125 kg NPK per ha (2:1.25 N:K) resulted in significantly higher yield per ha (11.59 q ha^-1) as compared to RDF (9.19 q ha^-1). Economic analysis clearly suggests that application of 200:75:125 kg N:P₂O₅:K₂O per ha/2:1.25 N:K ratio has appeared to be economically feasible to get higher net returns and benefit:cost ratio.

Keywords

N:K Ratios, Byadgi Dabbi, B:C Ratio.

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Mahesh S. Goudar ¹, B. I. Bidari ², K. K. Math ¹, H. T. Channal ³

Affiliations
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Soil Sciences, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
3 Directorate of Research, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN

Abstract

An investigation was undertaken to study the effect of long-term application of spentwash (5 to 20 years) on vertisol with special emphasis on K-adsorption desorption phenomenon. The highest amounts of water soluble, exchangeable and non-exchangeable K were observed in pedon-1 which received spentwash irrigation for >20 years. The cumulative K release values obtained for surface soils with successive extraction with boiling 1N HNO3 ranged from 692 to 5220 mg kg^-1. The constant rate K values ranged from 16 to 17 mg kg-1. Spentwash irrigated pedons recorded more K adsorption compared to unirrigated one. Lowest K-adsorption was observed in pedon-5 (control) that ranged from 1338 to 1422.39 mg kg-1 while highest (1422.19 to 1898.10 mg kg^-1) adsorption was recorded in pedon irrigated with spentwash for more than 20 years.

Keywords

Spentwash, Adsorption, CR-K, Non-Exch. K, Desorption.

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S. Ravi ¹, H. T. Channal ²

Affiliations
1 Krishi Vigyan Kendra, Bidar (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Science, Dharwad (Karnataka), IN

Abstract

A field experiment was carried out to study the effect of sulphur, zinc and iron nutrition on growth, yield and nutrient uptake by safflower on Vertisol at the Main Agricultural Research Station, University of Agricultural Sciences, Dharwad, during Rabi season 2002-03. The results indicated that application of 30 kg S per ha showed superior growth parameters like plant height, number of leaves per plant, number of branches per plant and dry matter per plant, yield components like number of capsules, seed weight per head, 1000-seed weight and nutrient uptake of N, P, K, S, Zn and Fe as compared to other treatments. Combinations of sulphur along with micronutrients had significant influenced on the growth, yield and nutrient uptake by safflower. The treatment receiving 30 kg S per ha+Fe+Zn foliar recorded the highest growth, yield and nutrient uptake as compared to 30 kg S per ha, 20 kg S per ha+Fe, Zn foliar, 10 kg S per ha+Fe+Zn foliar spray and control.

Keywords

Sulphur, Zinc, Iron, Safflower, Carthamus tinctorius L.

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