Papers by Nilmini Jayalath
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Tropical Agricultural Research, 2020
The temporal variations in rainfall, temperature and the
associated extreme events were examined... more The temporal variations in rainfall, temperature and the
associated extreme events were examined with the
objective to ascertain their potential effects on coconut
production in Ratnapura district of Sri Lanka. Temporal
variations were measured using Mann-Kendal test and
extreme events were examined using climate indices
related to daily rainfall and daily temperature. Daily
rainfall and minimum and maximum temperature data of
Ratnapura representing Agro Ecological Region, WL1a
obtained from the Department of Meteorology of Sri
Lanka for the period of 1961 to 2015, were used for the
analysis. The base period was considered as 1961 to 1990
as recommended by the World Meteorological
Organization. According to the results of the Mann-
Kendall tests, minimum temperature had a positive trend
and maximum temperature had a negative trend. Among
sector-specific climate indices, Standardized Precipitation
Evapotranspiration Index in the long-time scale and
minimum temperature showed a significant positive
trend and the value of the 95th percentile of maximum
temperature showed a significant negative trend.The
other indices related to drought, extreme rainfall, extreme
warm days and maximum annual number of consecutive
dry days did not show significant trends during the period
1991 to 2015. Despite the latter, the former indicates an
occurrence of drought like situations in the future.
Adoption of both short and long-term drought control
measures in coconut cultivations if they are to be
promoted in Agro Ecological Region of WL1a are
recommended as prolonged droughts and high
temperatures adversely affect production of coconuts.
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CORD
The purpose of this study was to assess the impact of a number of attributes (a = 23) upon 5 majo... more The purpose of this study was to assess the impact of a number of attributes (a = 23) upon 5 major factors (Labor, Land and Capital, Machine, Technical and Market) that influence a selection of a particular technology to manufacture brown coir fibre in Sri Lanka (i.e. Sri Lankan Drum Pairs, Defibering Machine, D1 Machine). A cross section of owners of fibre mills (n = 30) located in the Kurunegaka, Puttlam and Gampaha districts were selected and a personal interview with each mill owner was carried out with the help of a structured questionnaire from May to June 2008 to collect data. The Semantic Differential Analysis techniques were employed to find the relative strength of the attributes of 5 factors considered in the analysis, where the responses were recorded on a seven-point bipolar scale. The “XLStat” software was used extensively to plot the relationships between the 23 attributes and 3 technologies. The results suggest that all three technologies are negatively perceived by ...
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Bookmarks Related papers MentionsView impact
COCOS, 2015
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Papers by Nilmini Jayalath
associated extreme events were examined with the
objective to ascertain their potential effects on coconut
production in Ratnapura district of Sri Lanka. Temporal
variations were measured using Mann-Kendal test and
extreme events were examined using climate indices
related to daily rainfall and daily temperature. Daily
rainfall and minimum and maximum temperature data of
Ratnapura representing Agro Ecological Region, WL1a
obtained from the Department of Meteorology of Sri
Lanka for the period of 1961 to 2015, were used for the
analysis. The base period was considered as 1961 to 1990
as recommended by the World Meteorological
Organization. According to the results of the Mann-
Kendall tests, minimum temperature had a positive trend
and maximum temperature had a negative trend. Among
sector-specific climate indices, Standardized Precipitation
Evapotranspiration Index in the long-time scale and
minimum temperature showed a significant positive
trend and the value of the 95th percentile of maximum
temperature showed a significant negative trend.The
other indices related to drought, extreme rainfall, extreme
warm days and maximum annual number of consecutive
dry days did not show significant trends during the period
1991 to 2015. Despite the latter, the former indicates an
occurrence of drought like situations in the future.
Adoption of both short and long-term drought control
measures in coconut cultivations if they are to be
promoted in Agro Ecological Region of WL1a are
recommended as prolonged droughts and high
temperatures adversely affect production of coconuts.
associated extreme events were examined with the
objective to ascertain their potential effects on coconut
production in Ratnapura district of Sri Lanka. Temporal
variations were measured using Mann-Kendal test and
extreme events were examined using climate indices
related to daily rainfall and daily temperature. Daily
rainfall and minimum and maximum temperature data of
Ratnapura representing Agro Ecological Region, WL1a
obtained from the Department of Meteorology of Sri
Lanka for the period of 1961 to 2015, were used for the
analysis. The base period was considered as 1961 to 1990
as recommended by the World Meteorological
Organization. According to the results of the Mann-
Kendall tests, minimum temperature had a positive trend
and maximum temperature had a negative trend. Among
sector-specific climate indices, Standardized Precipitation
Evapotranspiration Index in the long-time scale and
minimum temperature showed a significant positive
trend and the value of the 95th percentile of maximum
temperature showed a significant negative trend.The
other indices related to drought, extreme rainfall, extreme
warm days and maximum annual number of consecutive
dry days did not show significant trends during the period
1991 to 2015. Despite the latter, the former indicates an
occurrence of drought like situations in the future.
Adoption of both short and long-term drought control
measures in coconut cultivations if they are to be
promoted in Agro Ecological Region of WL1a are
recommended as prolonged droughts and high
temperatures adversely affect production of coconuts.