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Parvathy, S.
- Novel Regression-Gis based Approach for the Analysis of Spread of Dengue in Palakkad
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Authors
Affiliations
1 Center for Excellence in Computational Engineering and Networking, Amrita Vishwa Vidyapeetham, Coimbatore - 641001, Tamil Nadu, IN
1 Center for Excellence in Computational Engineering and Networking, Amrita Vishwa Vidyapeetham, Coimbatore - 641001, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 24 (2015), Pagination:Abstract
In this paper we try to analyze what is the relationship between number of dengue cases reported with that of the different environmental factors like temperature, rainfall etc. For doing this, we make use of regression analysis along with GIS. This method also helps in predicting the future course of the disease spread as we will be in a position to identify the dependence on different factors. We got a Coefficient of determination R2 value of 0.9218, implying that our method is efficient for accurately identifying the relationship between the different parameters and number of cases reported.Keywords
Coefficient of Determination, Dengue, GIS, Regression Analysis, Vector Borne DiseasesFull Text
- Surface Soil and Subsoil Acidity in Natural and Managed Land-Use Systems in the Humid Tropics of Peninsular India
Abstract Views :195 |
PDF Views:93
Authors
K. M. Nair
1,
K. S. Anil Kumar
1,
M. Lalitha
1,
Shivanand
1,
S. C. Ramesh Kumar
1,
S. Srinivas
1,
Arti Koyal
1,
S. Parvathy
1,
K. Sujatha
1,
C. Thamban
2,
Jeena Mathew
2,
K. P. Chandran
2,
Abdul Haris
2,
V. Krishnakumar
2,
V. Srinivasan
3,
Jessy
4,
James Jacob
4,
J. S. Nagaraj
5,
Maria Violet D’Souza
5,
Y. Raghuramulu
5,
R. Hegde
1,
S. K. Singh
1
Affiliations
1 Regional Centre, ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
2 ICAR-Central Plantation Crops Research Institute, Kasaragod 671 124, IN
3 ICAR-Indian Institute of Spices Research, Kozhikode 673 012, IN
4 Rubber Research Institute of India, Kottayam 686 009, IN
5 Coffee Research Institute, Chikmagalur 577 117, IN
1 Regional Centre, ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
2 ICAR-Central Plantation Crops Research Institute, Kasaragod 671 124, IN
3 ICAR-Indian Institute of Spices Research, Kozhikode 673 012, IN
4 Rubber Research Institute of India, Kottayam 686 009, IN
5 Coffee Research Institute, Chikmagalur 577 117, IN
Source
Current Science, Vol 116, No 7 (2019), Pagination: 1201-1211Abstract
Natural forests and managed plantations constitute the largest land-use systems in the humid tropics of southwestern parts of Peninsular India comprising the Western Ghats and coastal plain. Soils therein are naturally acidic and the acidity is enhanced in managed land-use systems through inputs of chemical fertilizers. Plant nutrient deficiencies and mineral toxicities constrain crop production in acid soils. Surface soil and subsoil acidity in forest, coffee, rubber and coconut land-use systems was evaluated. The spatial pattern of surface soil and subsoil acidity pointed to low intensity of acidification in Malnad region of Karnataka, moderate acidity in northern Kerala and strong acidity in southern Kerala. Among the land-use systems studied, soils under natural forests and coffee plantations were only slightly acidic in surface soil and subsoil, whereas rubber- and coconut-growing soils were strongly acidic. Both natural and managed land-use systems, however, had strongly acid reaction in surface soil and subsoil in southern Kerala. Biomass production and crop yield are constrained in strongly acid soil by toxic levels of aluminium (Al) on soil exchange complex (>0.5 cmol (+) kg–1 soil) and depletion of basic cations of calcium, magnesium and potassium (base saturation less than 50% or Al saturation more than 50%). Surface soil acidity can be ameliorated by incorporating liming materials into surface soils. In case of subsoil acidity gypsum too should be incorporated. Under humid climate partial solubility of gypsum permits movement of calcium into the subsoil layers, wherein calcium replaces the aluminium on exchange complex and sulphate radical precipitates the aluminium by formation of aluminium sulphate.Keywords
Base Saturation, Humid Tropics, Land-Use Systems, Surface Soil and Subsoil Acidity.Full Text
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