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The rainfall probability analysis of Mapalana and its application to agricultural production of the area

Author:

K. D. N. Weerasinghe

University of Ruhuna, Mapalana, Kamburupitiya, LK
About K. D. N.
Department of Agronomy, Faculty of Agriculture
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Abstract

Daily rainfall of the Mapalana Meteorological Station for 35 consecutive years were analysed for the Markov chain Robabilities for weekly rainfall and the rainfall availability of the location is assessed in relation to rice agronomy for both Yala and Maha seasons. It was revealed that the rainfall probability of > l0mm at 75% probability level and the Moisture Availability Index (MAI) of > 0.5 as good indicators to select the cropping cycles of both seasons. The crop establishment program of Mapalana in the Yala and Maha seasons has to be commenced around 16th April and 10th September respectively. It appeared that the availability of . rains during first weeks of April (1st to 15th of April) has an impact on the success of the Yala program. The consecutive dry weeks which could be experienced in October may delay the crop establishment program of Maha season till 41st week in 5 out of 10 years.
How to Cite: Weerasinghe, K.D.N., 1989. The rainfall probability analysis of Mapalana and its application to agricultural production of the area. Journal of the National Science Foundation of Sri Lanka, 17(2), pp.173–186. DOI: http://doi.org/10.4038/jnsfsr.v17i2.8219
Published on 27 Dec 1989.
Peer Reviewed

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