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Abstract
Tea grows on different slopes in North Eastern India. Varying intensity and duration of rainfall result in considerable soil loss, which has not been documented so far. Experiments were conducted during 2009 at the Tocklai Experimental Station of Tea Research Association, Jorhat, Assam (India) to monitor the periodical changes in soil loss from a newly established tea area with different rainfall intensities, duration and amount under varying degrees of slope (0.1, 2, 3 and 6 percent). The study revealed that an increase in the rainfall intensity, amount and duration in general, increased the soil loss in all treatments. An increase in the soil loss was recorded with the increase in slope per cent. The comparative soil loss, however, decreased with the advancement of crop/ increase in number of days after planting. The average soil loss per mm of rainfall under 0, 1, 2, 3 and 6 per cent slopes was found to be 2.65, 17.14, 34.91, 39.89 and 47.26 kg ha-1. The estimated average annual soil loss from these slopes was 5.37, 34.71, 70.70, 80.79 and 95.73 t ha-1 year-1, respectively. The trend of soil loss was highly correlated with the soil slope having R2 value of 0.95
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References
- Bordoloi, P. K. and Goswami, H., 1996. Designing drainage system for Darjeeling hill slopes and Cachar teelas. Drainage in Tea. Chakravartee J (ed), TES, TRA, Jorhat, pp 62-67.
- Chakravartee, J. and Barpujari, N., 1996. Planning of drainage for safe disposal of runoff water and erosion control in undulating land. Drainage in Tea. Chakravartee J (ed), TES, TRA, Jorhat pp 68-75.
- Dey, S. K., 1969. Soil aggregates. Two and a Bud., 31 (2): 56-57. DOI: https://doi.org/10.1007/BF01373026
- Dey, S. K. and Chakraborty R. C., 1968. Mulching and Splash Erosion. Two and a Bud., 15 (3): 122.
- Goswami, H., Barooah, A. K. and Dutta, P. K., 1997. Soil erosion from young tea fields on Cachar teelas. Two and a Bud., 44(2):12-14.
- Samraj, P., Chinnamani, S., Haldorai, B. and Henry, C., 1980. Preliminary studies on run-off, soil loss and conditions under tea plantations in the Nilgiris-Tamil Nadu. Paper presented in “National Symposium on Soil Conservation and Water Management in 1980’s held on Mar 12-13 at Central Soil and Water Conservation Research and Training Institute, Dehradun.
- Singh, B., 1984. Managing Water in Darjeeling A statement of problems. Two and a Bud., 31 (1): 2-3.
- Singh, B., 1979. Problems of Open Drainage System in Flat Lands. Two and a Bud., 26(1): 26-31.
References
Bordoloi, P. K. and Goswami, H., 1996. Designing drainage system for Darjeeling hill slopes and Cachar teelas. Drainage in Tea. Chakravartee J (ed), TES, TRA, Jorhat, pp 62-67.
Chakravartee, J. and Barpujari, N., 1996. Planning of drainage for safe disposal of runoff water and erosion control in undulating land. Drainage in Tea. Chakravartee J (ed), TES, TRA, Jorhat pp 68-75.
Dey, S. K., 1969. Soil aggregates. Two and a Bud., 31 (2): 56-57. DOI: https://doi.org/10.1007/BF01373026
Dey, S. K. and Chakraborty R. C., 1968. Mulching and Splash Erosion. Two and a Bud., 15 (3): 122.
Goswami, H., Barooah, A. K. and Dutta, P. K., 1997. Soil erosion from young tea fields on Cachar teelas. Two and a Bud., 44(2):12-14.
Samraj, P., Chinnamani, S., Haldorai, B. and Henry, C., 1980. Preliminary studies on run-off, soil loss and conditions under tea plantations in the Nilgiris-Tamil Nadu. Paper presented in “National Symposium on Soil Conservation and Water Management in 1980’s held on Mar 12-13 at Central Soil and Water Conservation Research and Training Institute, Dehradun.
Singh, B., 1984. Managing Water in Darjeeling A statement of problems. Two and a Bud., 31 (1): 2-3.
Singh, B., 1979. Problems of Open Drainage System in Flat Lands. Two and a Bud., 26(1): 26-31.