
L. M. J. R. WijayawardhanaXavier University of Louisiana | XULA · Biology
L. M. J. R. Wijayawardhana
Doctor of Philosophy
About
49
Publications
57,529
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
37
Citations
Introduction
Additional affiliations
February 2008 - present
Sugarcane Research Institute, Sri Lanka.
Position
- Postdoctoral Fellow (MissDelta), Xavier University of Louisiana, 1 Drexel Drive, New Orleans, LA, USA. and Research Officer (Water Management)
Description
- Research Officer - Sugarcane Water Management Postdoctoral Research Fellow (MissDelta), Xavier University of Louisiana, 1 Drexel Drive, New Orleans, LA, USA.
September 2006 - February 2008
Faculty of Agriculture, University of Ruhuna, Sri Lanka
Position
- Research Assistant
Publications
Publications (49)
Super absorbent polymer (SAP) can significantly improve soil moisture retention, which is an important factor in most agricultural production systems. Limited research exists on its specific application in sugarcane cultivation, particularly under the environmental conditions of the Dry Zone of Sri Lanka. Hence, the present study was conducted to e...
Correct citation of this paper:
Thilakarathna, W.P.D., Wijayawardhana, L.M.J.R., Nawarathna, S.L., Weragoda, W.G.M.S., & Deshan, J.D.S. (2024). Assessing potential of sugarcane bagasse biochar for increasing water holding capacity of sugarcane (Saccharum hybrid spp.) growing soils in Sri Lanka. In 5th National Symposium on Agro-Technology and Rural...
Citation of the paper: Wijayawardhana, L.M.J.R., Weerasinghe, K.D.N., and Navaratne, C.M. (2023). The Accuracy of the Curve Number Method in Estimating Rainfall-Runoff Relationships for Sugar Cane Land Use Under Tropical Climate in Sri Lanka: A Comparative Study of Measured and Computed Data. In Proceedings of the 14th International Conference on S...
Accurate soil information is critical to run crop simulation models in agriculture and many other models which are used to assist decision-making in crop management, irrigation, drainage, hydrology, environmental science, etc [1,2]. With the development of web-based GIS technology, the presentation of soil information in digital platforms has becom...
Continued application of the same chemicals as herbicides could develop resistance of weeds to the herbicides. Hence, screening of newly developed herbicide formulations is essential to find out more effective herbicides for controlling weeds in sugarcane at different growth stages of the crop and the weeds. An experiment was conducted to find out...
Correct citation of this article: Wijayawardhana, L. M. J. R., Navaratne, C. M. and Weerasinghe, K. D. N. (2023). Rainfall Pattern Changes in Sugarcane Plantation in Sevanagala, Sri Lanka., Sugarcane Sri Lanka, Sugarcane Research Institute, Uda Walawe, Sri Lanka. Volume -4. pp.18-24.
The present paper describes how to optimize deficit irrigation practices in rain-fed areas of the Sevanagala sugarcane plantation, aiming to enhance the potential yield of sugarcane while addressing the challenges created by the climate change.
Deficit irrigation technology has been developed for enhancing land productivity in water-limited agricu...
https://jas.sljol.info/articles/abstract/10.4038/jas.v18i2.10254/
Owing to the vast complexity of the Sri Lankan sugar sector, immediate implementations of novel research findings, such as those concerning cane and dry leaf harvesting (CDLH), affect the total system stability. Therefore, there is an imperative need for a system dynamics model for analyzing CDLH. The objective of this study was to develop such a m...
The present study was conducted to introduce an easy, accurate and rapid method to estimate
sugarcane evapotranspiration for DL1 agro-ecological zone, Sri Lanka using the version of
satellite-based global model “MODIS” available at “APPEARS Earth Data Cloud-NASA”.
Actual evapotranspiration data of sugarcane measured in daily basis by a weighing...
The "APSIM" crop simulation model has been frequently used to estimate sugarcane crop
yields around the world. Due to non-availability of parameterized sugarcane cultivars, it is
quite challenging to use it in Sri Lankan conditions. Aiming at this, 94 rain-fed sugarcane
farmer fields were selected via random sampling among new planting lands of...
The current findings can be used to accurately estimate the effective rainfall, which is the actual contribution of rainfall to be used by the sugarcane crop under Sri Lankan condition. Our findings will be useful to technical staff working in the fields of irrigation and water management. The information will be equally helpful to national-level r...
Citation of the paper: Wijayawardhana, L.M.J.R., Weerasinghe, K.D.N. and Navaratne, C.M., 2022. Normalized difference vegetation index (NDVI) associated with plant height and leaf area index of sugarcane (Saccharum spp. Hybrid)., International Symposium on Agriculture and Environment, Faculty of Agriculture, University of Ruhuna, Mapalana, Kamburup...
Citation of the article: Wijayawardhana, L. M. J. R., Navaratne, C. M., Weerasinghe, K. D. N., Siridewa, A., Senavirathn, A. W. K. G. C. (2022). Dry Spell Characteristics in Sevanagala, Sri Lanka and its Impact on Sugarcane Cultivation, Proceedings of the 10th YSF Symposium, National Science and Technology Commission, Sri Lanka.
Daily precipitation...
Tipping bucket is an accurate and reliable device that is used to measure runoff water flows, especially in small scale catchments. However, the performance of the tipping bucket device depends on magnitude of the runoff water flow, dimension of the tipping bucket and the accuracy of the calibration. This paper discusses technical guidelines that g...
An analysis was conducted to estimate the agro-climatic changes, which would incur due to projected climate change scenarios on sugarcane cultivation in Sevanagala, Sri Lanka over the next 70 years. The general circulation model developed by the Beijing Meteorological Centre was used with Representative Concentration Pathways scenario 6.0 to simula...
A study was conducted to identify the causatives for low ratoon yield in sugarcane plantation special reference to hydro-geomorphologic parameters of the landscape. Hydro-geomorphologic parameters i.e. closed depressions, flow accumulation and topographical wetness index were assessed. These hydro-geomorphologic parameters were used as indicators f...
Please cite the dataset as follows: Wijayawardhana, L.M.J.R., Saputhanthri, S.D.T.P., Vidhana Arachchi, L.P. and Witharama, W.R.G. (2017). Management of Physical Properties of Reddish Brown Earth Soils at Uda Walawe(Walawa Series) for Sustainable Sugarcane Production., Sugarcane Sri Lanka, Sugarcane Research Institute, Uda Walawe, Sri Lanka. Volume...
Furrowing at a 1% slope has been recommended for planting sugarcane in Sri Lanka for improving irrigation efficiency and controlling soil erosion in sloppy lands. Furrows are constructed according to a horizontal baseline demarcated using a dumpy level, auto level or a theodolite, keeping a uniform slope along the line. However, this method is not...
A field experiment was conducted at the research farm of the Sugarcane Research Institute, Uda Walawe,Sri Lanka to find out the feasibility of reducing gross irrigation water requirement of irrigated sugarcane by practising alternate-row furrow irrigation method in Reddish Brown Earth soil (RBE). The effects of the three treatments, i.e., every fur...
Changing rainfall pattern and shifting monsoonal weather are critical climatic factors affecting sugarcane production in Sri Lanka.The scarcity of water to fulfill the irrigation requirement coupled with prolonged drought have severely affected the sugarcane production.A shift of fauna, flora, and microbial population with changing climatic conditi...
Correct citation of this article: Wijayawardane, L.M.J.R., De Silva, A.L.C. and Witharama, W.R.G. (2016). Evaluation of alternate-row furrow irrigation technique on the growth and performance of sugarcane (Saccharum officinarum L.) grown in Reddish Brown Earth soil in Sri Lanka. In: Proceedings of the 6th symposium on plantation crop research –“Pla...
Correct citation of this article : Witharama, W.R.G., De Silva, A.L.C. and Wijayawardane, L.M.J.R. (2015). Krismat 75 WG, A Novel herbicide for early and late post immergence weed control in sugarcane, Sugarcane Sri Lanka, Sugarcane Research Institute, Uda Walawe, Sri Lanka. Volume -2
Correct citation of this article: Wijayawardane, L.M.J.R., De Silva, A.L.C. Witharama, W.R.G. and Nimal, W.G. (2015). Analysis of consecutive–day maximum rainfall at Uda Walawe, Sri Lanka, Sugarcane Sri Lanka, Sugarcane Research Institute, Uda Walawe, Sri Lanka. Volume -2
Correct citation of this paper: Wijayawardane, L.M.J.R., De Silva, A.L.C. and Witharama, W.R.G. (2014). Optimizing planting schedules of sugarcane for saving irrigation water in Sevanagala and Uda Walawe, Sri Lanka, Sugarcane Sri Lanka, Sugarcane Research Institute, Uda Walawe, Sri Lanka. Volume -1
Correct citation of this publication: Wijayawardhana, L.M.J.R., De Silva, A.L.C., and Witharama., W.R.G. (2013). Assessment of Water Requirement of Sugarcane, Banana and Paddy in Sevanagala. 69th Annual Sessions, Sri Lanka Association for the Advancement of Science. Colombo, Sri Lanka.
Coastal areas are among the world’s most productive but ecologically fragile regions. Coastal groundwater is a dynamic and replaceable resource. Ground water is the largest source of fresh water available on earth, which is exploited to satisfy domestic, agriculture and industrial purposes. Ground water plays a significant role in the overall circu...
The benefits of mulching in ratoon crops are well documented, but mulching in plant crops of sugarcane is a new concept. The objective of this study was to investigate the feasibility and benefit of using Gliricidia leaves and sugarcane trash as a mulch in a plant crop of sugarcane to enhance the productivity of low productive sugarcane lands. Thus...
The present research study was conducted in Madiha, Gandara and Devinuwara
areas in Southern coastal strip of Sri Lanka to identify the groundwater
distribution. A total of 50 dug wells in Madiha and 50 in Gandara were selected
from the coastal belt for the initial survey. The ield survey program was initiated in
the study area using questionnaires...
The temporal behavior of Salinized ground water due to the 2004 Tsunami wave in Weligama bay area, were studied by selecting 160 wells situated in the coastal belt. The salinity changing patterns of the wells were investigated from June 2005, in monthly intervals for 33 consecutive months. Prior to the Tsunami , well water quality of the area were...
Sugarcane is a perennial crop grown in the intermediate and the dry zones of Sri Lanka for the commercial purpose. At present nearly 15,000 farmer families are directly involved in sugarcane production for Vacuum-pan sugar mills while large number of farmer families produce jaggery and syrup as a cottage industry. There is a potential of producing...
After the Asian tsunami 2004 coastal groundwater resources were contaminated by saline water due to the destruction of shallow dug wells and the urgent need to supply safe, clean drinking water to the affected regions. Suitable dug well was selected from out skirt of tsunami belt in Weligama to supply drinking water to affected people. The present...
Availability of well-analyzed safe water plays a vital role in national development. Large amount of water is required for various day to day activities like human consumption, agriculture and industrial purposes. The surface and underground water is being contaminated with various elements, by the untreated discharge of sewage water and poor sanit...
Spatial and Temporal Variability’s of Groundwater Characteristic Distribution in the Nilwala River Basin
Groundwater Quality Assessment in Agriculture Dominant Watershed of Southern Sri Lanka (Case study in Polwatumodera River Basin Water Shed-Weligama, Denipitiya)
Evaluation of Groundwater Resource Potential in Tsunami Affected Coastal Belt of Southern Sri Lanka
A simple household level natural water purification system to purify water to meat small family requirement. It disused with six important components including Storage, Sedimentation, Biological treatment, and Filtering, Disinfection and Drinking water storage. During the treatment process Electrical conductivity and Total Dissolved Solids values i...
Groundwater Contamination by Biological Pollutants in Denipitiya Area
Questions
Questions (11)
Hello everyone,
I use the carot package to execute my machine learning algorithms. Once I have finished the analysis, how do I copy the model that I used (LDA in my case) in R envioronment into the Excel speed sheet? ? Please help me. It is very urgent, please.
Thanks
I am traying to calculate daily ET0 using penman montain equation in R package Evapotraspiration. according to the package documentation, the script shoul be as follws
results <- ET.PenmanMonteith(data, constants, ts="daily", solar="sunshine hours",
wind="yes", crop = "short", message="yes", AdditionalStats="yes",save.csv="yes")
I fitted my data as follows
d = c(Tmax = 35, Tmin = 25, RHmax = 80, RHmin = 45, Rs = 6, u2 = 5)
e = c(Elev=78,lambda = 2.45,z = 2, sigma = 4.903*10^-9, G = 0)
r <- ET.PenmanMonteith(data = d, constants = e, ts="daily", solar="sunshine hours", wind="yes", crop = "short", message="yes", AdditionalStats="yes", save.csv="yes")
Once I run this code, following error is appearing. what is the wrong of my code.
Error: $ operator is invalid for atomic vectors