Informatics Publishing Limited

R. F. Channagoudar ¹, H. B. Babalad ¹, R. K. Patil ¹, S. I. Halikatti ¹, M. H. Malligwad ¹, M. N. Sreenivasa ¹, K. K. Math ¹

Affiliations
1 Institute of Organic Farming, University of Agricultural Sciences, Dharwad, Karnataka, IN

Abstract

A field experiment was carried out at Main Agricultural Research Station, Dharwad during Kharif, 2010 and 2011 to study the nutrient management practices for organic cotton production. The results of the two years pooled data revealed that, among the treatment combinations, integrated application of RDF + FYM and green leaf manure as mulch with application of jeevamrutha @ 500 l/ha recorded significantly higher number of bolls per plant (41.37), mean boll weight (5.05 g), kapas weight per plant (116.88 g), kapas yield (1858 kg/ha) over other treatments. Among the organic combinations application of compost (50%) + vermicompost (50%) equivalent to RDF + green leaf manure as mulch with application of jeevamrutha @ 500 l/ha recorded higher number of bolls per plant at 150DAS, mean boll weight, kapas weight per plant, kapas yield , net returns and B:C ratio and was at par with RDF + FYM and which was superior over RDF only. Among the nutrient management practices, application of FYM @ 5t per ha + RDF recorded significantly higher number of bolls per plant (40.13) at 150DAS, mean boll weight (4.87 g), kapas weight per plant (114.69), kapas yield (1777 kg/ha), net returns (Rs. 53530) and B:C ratio (2.67) over rest of the treatments. Among the organic manurial treatments, combined application of compost (50%) + vermicompost (50%) equivalent to RDF recorded significantly higher number of bolls per plant (36.53), mean boll weight (4.42 g), kapas weight per plant (107.96) and kapas yield (1579 kg/ha) over other organic manurial treatments but was at par with crop residue (50%) + vermicompost (50%) equivalent to RDF. However, crop residue (50%) + vermicompost (50%) equivalent to RDF recorded significantly higher net returns (57220) and B:C ratio (2.80) over other organic manurial treatments. Among the green manuring treatments, application of green leaf manure (GLM) @ 7.5 t per ha with jeevamrutha @ 500 l/ha surface applied recorded significantly higher number of bolls per plant (36.51), mean boll weight (4.46 g), kapas weight (109.08 g), kapas yield (1621 kg/ha), net returns (Rs. 55890) and B:C ratio (2.70) over other green manuring treatments and was at par with lucerene + jeevamrutha.

Keywords

Organic Manures, Green Manures, Liquid Manures, Kapas Yield

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K. Prabhavathi ¹, B. I. Bidari ¹, G. B. Shashidhara ², K. K. Math 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 Typic Chromustert at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad, the yield of chilli was significantly influenced by the levels and sources of potassium. The treatment that received 150 per cent RDK through SOP in 2 split doses recorded highest fruit yield (10.71 q ha^-1). The highest uptake of N (67.93 kg ha^-1), K (106.77 kg ha^-1) and S (15.30 kg ha^-1) were noticed with the application of potassium at the rate of 150 per cent RDK through sulphate of potash in 2 split doses.

Keywords

Chilli, MOP, SOP, Photosynthates.

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S. Divya ¹, K. K. Math ¹, B. I. Bidari ²

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

Abstract

A field investigation was conducted in a Vertisol at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad during kharif 2006-07 to study the use of gold ore tailings (GOT) as a source of micronutrients on sunflower crop under irrigated condition. Application of GOT @ 1.0 t/ha along with poultry manure significantly improved yield attributing parameters eventually resulting in 22.5 and 26.5 per cent higher seed and stalk yield, respectively over control. The uptake of copper (2345 mg/kg), iron (91567.6 mg/kg), manganese (319.1 mg/kg) and zinc (284.1 mg/kg) also increased significantly due to the application of same level of GOT along with poultry manure. Similar results were observed with application of GOT alone @ 1.0 t/ha and with FYM and vermicompost.

Keywords

COT, GOT, Seed Filling, Oil Content, Sunflower.

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K. K. Math ¹, B. I. Bidari ¹, S. S. Angadi ¹, A. V. Gaddi ¹, G. Vilasitha ¹

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

Abstract

The waste management in the distilleries has always been a complex problem due to large volume of waste. This waste water produced by distilleries is generally discharged on land or running water. Distillery effluent contains high amount of organic matter, nitrogen, phosphorus, potassium, very high in biological oxygen demand (BOD) and chemical oxygen demand (COD) values. In addition to these nutrients, the effluent often contains substantial amounts of different organic, inorganic materials, growth parameters as well as toxic trace elements. Therefore, the effluent if utilized for crop production can prove to be a very good source of nutrients and reduce investment on fertilizer. Since the effluent contains fairly high salt load and toxic trace metals, along with high BOD and COD, the environmental implications due to its continuous use cannot be ruled out. An attempt has been made for one time controlled land application of treated bio-methanated spentwash as liquid manure for the crops based on their recommended dose of nitrogen.

Keywords

BOD, COD, Spentwash, Micronutrients.

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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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