http://repository.ou.ac.lk/handle/94ousl/911 2026-05-16T00:43:52Z http://repository.ou.ac.lk/handle/94ousl/1034 Impact of Irrigation Methods and Mulches on Chilli (Capsicum annuum L.) Leaf Curl Complex and Yield in Jaffna District of Sri Lanka Maheswaren, P; De Silva, C.S. A field study was conducted to evaluate the varietal performance of green Chilli (Capsicum annum) for Chilli leaf curl complex with different mulches and irrigation system from May to October 2016. Chilli is one of the most important cash crop grown in Sri Lanka. Generally Jaffna farmers get low yield (8- 10 ton / ha) from Chilli cultivation, mainly due to pest and diseases incidence. This research was carried out to study the effect of irrigation with different mulch material on leaf curl complex and the yield of green Chilli. The factors consisted of irrigation systems (sprinkler, drip and basin), varieties (Galkiriyagama, Super Hybrid and Vijaya hybrid) and mulch (No mulch, Neem leaves, Giliridicia leaves) in split plot design with three replicates. Results were analyzed by SAS package and the mean separation was done by Duncan method.(Probability 5 %).Plant height and canopy width were statistically not significant among irrigation, varieties and mulches. The difference in yield of chilli was statistically significant among varieties, mulches and irrigation systems. Higher yield was recorded in neem mulch under sprinkler irrigation system due to the low incidence of pest attack at 2nd harvesting (12 ton / ha). Therefore, sprinkler irrigation system with neem is more suitable for Super Hybrid chilli cultivation to reduce leaf curl complex and to obtain optimum yield. 2001-12-16T00:00:00Z http://repository.ou.ac.lk/handle/94ousl/1033 Investigation of FM Radio Reception in Sri Lanka Perera, C. J. S. A. H. 2012-12-16T00:00:00Z http://repository.ou.ac.lk/handle/94ousl/1029 A Study to Find out The Suitability of Nuclear Power Plant to Sri Lanka Thisirini, R.L.T. Power plants with larger capacities should be introduced to the system to meet the future demand of the country. This paper discusses the possibility of introducing nuclear power plant (NPP) to meet this demand. Since the nuclear power plants are based load plants base load of a system should be sufficient to operate NPP. The paper analyses future demand of the country to see the feasibility of NPP to Sri Lankan power system. The paper also discusses different technologies for NPP and type of reactor that may be suitable for Sri Lanka. The paper analyzes the possible locations of NPP considering factors that are affected in deciding locations for NPP. The aspect of radioactive waste management which is one of critical aspects in NPP operation has been also discussed. The options available for the NPP to the exiting grid also are a part of this work. 2001-12-16T00:00:00Z http://repository.ou.ac.lk/handle/94ousl/1028 Identification of Suitable Irrigation Interval for Paddy Based on Growth and Yield to Adapt Water Shortage Problem in Ampara District of Sri Lanka Dilshad, H.M.M . Field trials were conducted at Rice Research Station, Sammanthurai during “Yala” season 2017 to evaluate the effects of irrigation intervals (7, 10 and 14 days) ongrowth and yield parameters of rice varieties Bg 250 (Short duration) and Bg 94.1 (Long duration) in order to cope with water shortage problem in irrigation schemein th study area.The trial was performed as pot experients as it was difficult control irrigation intervals in the Field. Experiment was designed as factorial treatment in randomized complete blocks design with six treatments and three replicates. The germinated seeds were established in the 40 cm diameter and 30 cm depth of 18 pots. The results showed that the Bg 250 produced 2967.30 ± 90.92 kg/ha which is 27% higher yield than Bg 94-1with the application of water at 7 days irrigation interval. The Bg 250 produced 2589.50 ± 350.83 kg/ha (18% higher yield) grain yield with the 10 days irrigation interval. Cost of irrigation was calculated as labour cost for irrigation arrangement per day and the cost of irrigation.Bg 250 was 17.6 % and 16.7% lower than the cost of Bg 94-1 when water was applied at 7 days and 10 days irrigation interval, respectively. The grain yield was significantly different between the rice varieties Bg 250 and Bg 94-1 where the Bg 250 was produced higher grain yield in all three irrigation intervals. Therefore Bg 250 can be recommended for “Yala” season in Ampara District with the application of water at irrigation intervals 7 days and 10 days interval to deal with the shortage in water that is being faced currently in Ampara district farmers now and in the foreseeable future. 2001-12-16T00:00:00Z