http://ir.lib.seu.ac.lk/handle/123456789/6396 2022 2026-04-11T22:28:31Z http://ir.lib.seu.ac.lk/handle/123456789/6413 Title: Detection of Freshness of the Fruits using Machine Learning Techniques Authors: Jayasinghe, P. K. S. C.; Sammani, S. Abstract: Survival period of the fruits after harvest is relatively short. The main objective of this research is to measure the freshness of fruits by observing their CO2 release, water vapor release, and O2 absorption after harvesting for the papaya and watermelon. They were categorized into the three groups (500g-1kg, 1kg-1.5kg, 1.5kg- 2kg) and tested in 4 selected days including the harvested day, three days after harvest, a week after, and two weeks after to observe the changes in these three factors (CO2, O2, and humidity). A CO2 sensor, an O2 sensor, and a humidity sensor was set up to detect the changes. The collected data was used to train the machine learning model (Keras Sequential Model). After entering the type of the fruit, weight, the difference of oxygen, and water vapor concentration after 45 minutes, as inputs for the model, the model will predict the freshness of the fruit as a percentage. The Accuracy of the developed model was considered to be 0.989. The results of the analysis implied that the rate of O2 absorption gradually increases after harvesting and the water vapor release gradually decreases. It is suggested to use higher sensitivity sensors to obtain accurate results. 2022-06-30T00:00:00Z http://ir.lib.seu.ac.lk/handle/123456789/6412 Title: A method to calibrate steel length measuring tapes by mechanical comparison Authors: Liyanawaduge, Nalin Prasanna; Sooriyaarchchi, Anura Abstract: This paper describes a mechanical method for calibration of steel length measuring tapes with a hook or hook-ring and lengths up to 10 m. A reference and a test tape are laid horizontally by a series of horizontal supporters. In the measuring process the reference standard tape is moved with respective to the test tape by rotating a micrometer head. This movement is measured by a digital dial gauge. The tension weights are used to stretch out the tapes up to appropriate tensions. The tapes are properly clamped at the other end of the system against the pulling force of tension weights. The coincidence of scale marks is done by viewing the image of a CCTV camera which is coupled with a monitor. The temperature of the two tapes is measured to account the temperature effect. The deviation in length from the zero of the test tape is measured by considering temperature correction and sag correction. The performance of the system was checked with a pre-calibrated steel tape and results from the system are in agreement with the calibration certificate of the test tape. A method to estimate the combined uncertainty of the deviation in length calculated by the proposed method is also presented 2022-06-30T00:00:00Z http://ir.lib.seu.ac.lk/handle/123456789/6411 Title: Effect of seed pelleting on the growth and yield performance of sesame (Sesamum indicum L.) cultivation Authors: Wasanthika, H. M. N.; Edirimanna, I. C. S.; Nashath, M. N. F.; Mubarak, A. N. M.; Kumara, A. D. N. T. Abstract: Sesame (Sesamum indicum L.) is an underutilized oilseed crop that has greater potential to serve as alternative food and feed source. However, sesame cultivation is limited due to the small seed size with poor rates of germination, which has a substantial impact on crop field establishment. Hence, the present study was carried out to evaluate the effects of artificial seed coating (pelleting) on crop establishment via conventional and mechanization means. Here, six different treatments (T1 (Pelleted seeds+Seeder), T2 (Pelleted seeds+Row planting), T3 (Pelleted seeds+Broadcasting), T4 (Naked seeds+Seeder), T5 (Naked seeds+Row planting), and T6 (Naked seeds+Broadcasting)) were arranged in Randomized Complete Block Design (RCBD) with three replicates. The results showed that the germination, root, and yield characteristics of sesame plants were significantly (p<0.05) affected by the treatments. The germination indices were significantly higher in naked seeds compared to pelleted seeds. The highest root width (15 cm) and volume (6.11 cm3) were recorded in T3 while the lowest was in T5 (7.7 cm) and T6 (1.71 cm3) respectively. The highest number of capsules per plant (63) was in T3 while T4 had the lowest (18). The number of seeds per capsule was higher in T1 (53) while the lowest was in T5 (31) and T6 (32). T1 resulted in the highest total yield (1404 kg/ha) conversely, T3 gave the lowest (253 kg/ha). Thereby, pelleted seeds sown using seeders enabled successful crop establishment and yield performances compared to other treatments. 2022-06-30T00:00:00Z http://ir.lib.seu.ac.lk/handle/123456789/6410 Title: Comparison of growth and yield performances of horsegram (Macrotyloma uniflorum L.) supplemented with organic and inorganic fertilizers Authors: Yapa, S. W. W.; Nalin Samaranayake, B.; Kumara, A. D. N. T.; Mubarak, A. N. M. Abstract: Abstract—Horsegram is an underutilized legume with greater potential to utilize as food and feed. In the Sri Lankan context, no fertilizer recommendations have been developed, as such impede commercial cultivation of horsegram. Hence, a field experiment was carried out to investigate the crop performance of two varieties viz; ANKK -black and ANKK-brown under different regimes of fertilizer applications. The treatment comprised of the full dose of recommended inorganic fertilizer of mung bean (T1), a half dose of recommended inorganic fertilizers (T2), compost mix (T3), and control treatment (T4) were laid down in a split-plot design replicated three times. The results revealed that variety ANKK-brown responded superior to the ANKK-black. The highest chlorophyll content (44.3), dry weight of shoot (29g Plant-1), root (1.97g plant-1), pods (160 plant-1), and mean grain yield (1877.8 kg ha-1) resulted in T1. However, a significantly increased number of root nodules (42 plant-1) were produced with T3. Moreover, there was a positive association between chlorophyll content versus the number of pods per plant (0.45), shoot (0.52) and root (0.53) dry matter production. Therefore, the findings suggest that the horsegram can either be successfully grown with NPK inorganic fertilizers of 35 kg/ha urea, 100 kg/ha muriate of potash (MOP) and 75 kg/ha triple super phosphate (TSP)] or be with the application of organic manures at the rates of 10,000kg/ha (T3) without significant compromise in crop yields 2022-05-15T00:00:00Z