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Yogesh, G. S.
- Effect of Long Term Soil Fertilizer Application on forms and Distribution of Potassium in Soil Under Ricecowpea Cropping System
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Authors
Affiliations
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, G.K.V.K. University of Agricultural Sciences, Bengaluru (Karnataka), IN
2 Department of Soil Science, College of Agriculture (U.A.S.), Hanumanahatti (Karnataka), IN
3 Krishi Vignana Kendra, (U.A.S.) Chamarajanagar (Karnataka), IN
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, G.K.V.K. University of Agricultural Sciences, Bengaluru (Karnataka), IN
2 Department of Soil Science, College of Agriculture (U.A.S.), Hanumanahatti (Karnataka), IN
3 Krishi Vignana Kendra, (U.A.S.) Chamarajanagar (Karnataka), IN
Source
An Asian Journal of Soil Science, Vol 11, No 1 (2016), Pagination: 9-19Abstract
An experiment was conducted at Zonal Agricultural Research Station, VC farm, Mandya to assess the effect of long term soil fertility management on behaviour of potassium with respect to different forms and distribution pattern in rice-cowpea cropping system. Soil of the study area belong to sandy loam texture having initial pH (6.28), EC (0.14 dSm-1), CEC (9.60 cmol (p+) kg-1), MWHC (20.70%) and bulk density (1.67 gcc-1). The organic carbon (0.34 %), available nitrogen (163 kg ha-1), available potassium (134 kg ha-1) were low and medium in available phosphorus (29.20 kg ha-1). Results indicated that the water soluble K content of soils varied from 8 to 16 mg K kg-1 in the surface layer and 5 to 14 mg K kg-1 in the sub surface layer in the plots treated with different fertilizer, manure and their combinations. Exchangeable K also ranged between 59 and 116 mg K kg-1 in the surface layer and 58 to 98 mg K kg-1 in the sub surface layer. The non-exchangeable K content ranged from 111 to 874mg K kg-1 and from 160 to 880 mg K kg-1, respectively in the upper and the lower layers. The total K content varied from 792 to 3017 mg K kg-1 at 0-15 cm depth and from 874 to 3318 mg K kg-1 at 15-30 cm depth.Keywords
Potassium, Forms, Distribution, Rice, Cowpea.
References
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- Study of Dynamics of Electro-Chemical Properties of Submerged Soils
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Authors
Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences (G.K.V.K.), Bengaluru (Karnataka), IN
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences (G.K.V.K.), Bengaluru (Karnataka), IN
Source
An Asian Journal of Soil Science, Vol 11, No 1 (2016), Pagination: 74-77Abstract
Wetland rice systems in Asia make a major contribution to global rice supply. The system is also able to maintain soil fertility on a sustainable basis. The essential components of wetland rice culture comprise cultivation of land in the flooding, puddling and transplanting of rice seedlings into puddled rice paddies, and growing the rice crop under flooding. The wetland rice system, growing rice in submerged soils has a great ameliorative effect on chemical fertility: largely by bringing pH in the neutral range, resulting in better availability of plant nutrients and accumulation of organic matter. Submergence bring a lot changes in redox potential which in turn gives the idea of reduction of nutrients to release to soil solution to make available to plant. This article revealed the dynamic changes of soil pH, electrical conductivity and Redox potential on submergence.Keywords
Flooding, Submergence, Soil pH, Electrical Conductivity, Redox Potential.References
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- Effect of the Graded Levels of Potassium with Recommended NP on Soil Properties under Maize Cultivation in Alfisols of Mandya, Karnataka
Abstract Views :276 |
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Authors
Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, GKVK, Bengaluru (Karnataka), IN
2 Krishi Vigyan Kendra (U.A.S.), Chamaraja Nagar, Bengaluru (Karnataka), IN
3 College of Agriculture (U.A.S.), Hanumanamatti (Karnataka), IN
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, GKVK, Bengaluru (Karnataka), IN
2 Krishi Vigyan Kendra (U.A.S.), Chamaraja Nagar, Bengaluru (Karnataka), IN
3 College of Agriculture (U.A.S.), Hanumanamatti (Karnataka), IN
Source
An Asian Journal of Soil Science, Vol 12, No 1 (2017), Pagination: 98-102Abstract
During Kharif 2012, a field experiment was conducted in an alfisol of Mandya with different levels of potassium under irrigated maize to know the impact of application of potassium on various soil properties. The study involved nine treatments viz., Recommended NPK as per UAS (B) package, rec. NPK 15 DAS, NP + 75, 100, 125 per cent rec. K in splits, NP only and absolute control, replicated thrice and the statistical design was RCBD. The results of the experiment indicated that, soil pH and EC not varied much due to application of graded levels of potassium in maize. Highest organic carbon content was recorded in the treatment of recommended dose of NP + recommended dose of K in two splits (basal and at the time of topdressing). The soil available NPK content after the harvest of maize crop differed due to application of graded levels of potassium and the highest NPK content was recoded with the application of recommended NPK as per UAS (B) package and lowest available nitrogen was registered in the control. Similar trend was also observed with respect to exchangeable Ca, Mg and available sulphur. Application of recommended NP + 125 per cent of recommended K in two splits recorded the higher values for the various soil properties studied.Keywords
Maize, Graded Levels of Potassium, Soil Properties.References
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