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Khola, O. P. S.
- Manuring Needs of Tea (Camellia sinensis) in Southern India
Abstract Views :213 |
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Authors
Affiliations
1 ICAR-Indian Institute of soil and Water conservation, Research Centre, Udhagamandalam (T.N.), IN
1 ICAR-Indian Institute of soil and Water conservation, Research Centre, Udhagamandalam (T.N.), IN
Source
Rashtriya Krishi (English), Vol 11, No 1 (2016), Pagination: 12-14Abstract
Tea (Camellia sinensis) is an important plantation crop. India has 5,63,980 ha land under tea of which 1,05,685 ha is in Southern India. In India states like Assam (53%), West Bengal (23.9%), Tamil Nadu (11.3%) and Kerala (8.44%) are contributing for major tea production. It is also grown in a small scale in Tripura, Karnataka, Himachal Pradesh, Uttar Pradesh, Sikkim, Bihar, Manipur, Orissa, Nagaland and Arunachal Pradesh. Tea industry in India is more than 150 years old generating the revenue of more than Rs 6,000 crore per annum. The production of tea in India has increased from 250 million kg in 1947 to 1208 million kg in 2013 with 40 per cent increase in area. Optimum application of nutrients in right time ensures optimum tea yield.
- Clay Dispersion Induced by Changes in Some Soil Properties in Undulating Salt-Affected Landscapes of Southern Karnataka, India
Abstract Views :251 |
PDF Views:97
Authors
K. Rajan
1,
A. Natarajan
2,
V. Kasthuri Thilagam
1,
K. S. Anil Kumar
2,
D. Dinesh
1,
N. M. Alam
3,
O. P. S. Khola
1,
R. C. Gowda
4
Affiliations
1 ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Udhagamandalam 643 004, IN
2 ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
3 ICAR-Indian Institute of Soil and Water Conservation, 218, Kaulagarh Road, Dehradun 248 195, IN
4 Department of Soil Science and Agricultural Chemistry, GKVK, University of Agricultural Sciences, Bengaluru 560 065, IN
1 ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Udhagamandalam 643 004, IN
2 ICAR-National Bureau of Soil Survey and Land Use Planning, Hebbal, Bengaluru 560 024, IN
3 ICAR-Indian Institute of Soil and Water Conservation, 218, Kaulagarh Road, Dehradun 248 195, IN
4 Department of Soil Science and Agricultural Chemistry, GKVK, University of Agricultural Sciences, Bengaluru 560 065, IN
Source
Current Science, Vol 110, No 5 (2016), Pagination: 874-883Abstract
Effect of sodicity on clay dispersion in salt-affected black soils of the Kabini canal command area in Chamrajnagar district, southern Karnataka was studied. Forty-eight soil samples were collected from nine soil profiles and analysed for physical and chemical properties. The clay dispersion ranged from 0.57% to 62.1%. High positive and negative correlations with exchangeable sodium and exchangeable calcium respectively, with clay dispersion were recorded, which can be predicted better with exchangeable sodium and available soil water. Based on clay dispersion value, 2%, 27% and 71% soils are dispersive, intermediate dispersive and non-dispersive respectively. Based on exchangeable sodium percentage, 50, 21 and 29 soils are dispersive, intermediate dispersive and nondispersive respectively. Application of gypsum and organics reduces the clay dispersion in surface soil. Sub-surface drainage will be more effective. Construction of soil and water conservation structures with pile foundation; providing cement lining for soil stabilization in normal construction; providing drainage lines for the structures; construction after refilling with non-dispersive soil will save the structures in salt-affected soils.Keywords
Clay Dispersion, Sodicity, Sub-Surface Effect, Surface Effect.Full Text