• Journal of Bio-Environment Control
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• v.18 no.4
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• pp.502-507
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• 2009

This study was conducted to establish the minimum harvesting time of 'Campbell Early' grape with girdling of 8 years old vines by the investigation of fruit quality. Girdling was performed as 5~7mm width at 1.0m height with a Y-trellis system on July 5th at Gimcheon, Gyeongbuk province. Skin color, soluble solids contents, sugar content, organic acid, and titratable acidity were analyzed every seven days period after the girdling. From 14 days after the girdling, pericarp color changed quickly as compared to the control, and also decreased b value and increased a value of Hunter L were observed. The content of organic acids decreased quickly as 0.85% as compared to the control's one, 1.10%. Sugar-acid ratio increased rapidly from the 21days as 15.1 against 10.8 of the control at harvesting time. After 14days, sugar content was abruptly increased such as fructose and glucose, that is 7days faster than the control. In harvesting time, their contents were high as $64.5mg{\cdot}g^{-1}FW$ and $61.0mg{\cdot}g^{-1}FW$ as compared to $56.1mg{\cdot}g^{-1}FW$ and $53.7mg{\cdot}g^{-1}FW$ of the control respectively. Among the content of organic acids, malic acid decreased quickly than the control's one in coloring time. The content of tartaric acid was obviously lower as $4.13mg{\cdot}g^{-1}FW$ than the control's one, $5.96mg{\cdot}g^{-1}FW$ in harvesting time. From these results, we assume that the harvesting of girdled 'Campbell Early' grape should be started in 42days after the girdling, when sugar-acid ratio is above 15.

• Journal of Drive and Control
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• v.21 no.2
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• pp.65-71
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• 2024

In this study, we suggested a key-point detection method for robot harvesting of oriental melon. Our suggested method could be used to detect the detachment part and major composition of oriental melon. We defined four points (harvesting point, calyx, center, bottom) based on tomato with characteristics similar to those of oriental melon. The evaluation of estimated key-points was conducted by pixel error and PDK (percentage of detected key-point) index. Results showed that the average pixel error was 18.26 ± 16.62 for the x coordinate and 17.74 ± 18.07 for the y coordinate. Considering the resolution of raw images, these pixel errors were not expected to have a serious impact. The PDK score was found to be 89.5% PDK@0.5 on average. It was possible to estimate oriental melon specific key-point. As a result of this research, we believe that the proposed method can contribute to the application of harvesting robot system.

• Journal of Bio-Environment Control
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• v.17 no.3
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• pp.204-209
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• 2008

This experiment was conducted to analysis the fruit quality according to training method under low plastic film greenhouse cultivation on sweet pepper (Capsicum annuum cv Special) during summer culture. Training treatments were upright training and inclination training, the fruits were examined and analysed with a month interval from June to November on productivity, fiuit weight, flesh thickness, contents of soluble solids, hardness, shape, and locules. Productivity per month was the highest on June, upright training harvested more than inclination training. Fruit weight of inclination training on June was 232 g which was higher than 26 g of upright training, but upright training was heavier than inclination training after July. Flesh thickness of upright training was thicker than inclination training. Soluble solids content increased with the decrease of temperature, upright training was higher than inclination training. The fruit shape of upright training was not significant according to harvesting date. The number of locules of upright training was $3.27\sim3.34$, and it was not significant according to harvesting date.

• Journal of Bio-Environment Control
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• v.13 no.2
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• pp.73-80
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• 2004

Two red pepper(Capsicum annuum L.) cultivars, 'Geumtap' and 'Bugang', were cultivated at main producing areas in Korea and harvested four times in 1998 and 1999. Length, weight, dry matter ratio and color of red peppers were measured at each harvest. The relations between external characteristics with regional climatic elements such as total accumulated air temperature, total amount of precipitation and duration of sunshine during the fruit growing periods were compared. Length and fruit weight decreased by delayed harvest. These characteristics were shown significant difference according to cultivars, but not to growing year. Dry matter ratio had a tendency to increase at the 3rd and 4th harvest. The red color as measured a${\times}$L values of pepper powder, increased with being later in harvesting, but the trend was uncertain. In fruit growth, fruit length showed a positive correlation with total accumulated air temperature in later growth period of fruits(from 1st to 20th day before harvesting), and fruit weight had relationships with accumulated air temperature and total amount of precipitation in later growth period of fruit. There was no relation between dry matter ratio and climate elements. The red color was shown high correlations with total amount of precipitation and duration of sunshine. There was highest coefficient of determination($r^2$) in all external characteristics.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1993.10a
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• pp.744-751
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• 1993

A prototype motorised hand-held mango harvester was designed and fabricated at the faculty of Engineering , University of Agriculture Malaysia. The harvester is aimed at reducing the harvesting operation time, improving the working comfort during the operation and increasing the harvesting capacity. The mango harvester consists of gripping and detaching devices, a power transmission shaft with a 12 V battery operated motor and an aluminium pole together with a collecting chute. Preliminary observation on the harvester's performance showed significant and satisfactory results. It was found out that the magno harvester was capable of harvesting on an average six seconds for each fruit detachment. Further study is being conducted to improve the efficiency and capacity of the mango harvester.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.23 no.2
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• pp.97-101
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• 2017

Fruits are subjected to a variety of vibration stress during the transportation from a production area to markets. Vibration inputs are transmitted from the transporting vehicle through the packaged fruit. And the steady state vibration input may cause serious internal damage of fruit. Product quality of fruits declines by various factors while they are stored right after harvesting and among the substance in charge of post ripening action, ethylene ($C_2H_4$) biosynthesis increases fruits' respiration process after harvesting and decreases storage expectancy. Ethylene production of apples rapidly increases while storage duration becomes longer. This tendency is much clearer for the apples with vibration stress at input acceleration level. When there was no vibration stress, change in ethylene production level of apples are not very large during storage. Ethylene production rates inside the gas collecting container increased significantly ($p{\leq}0.05$) after 24 hours storage, particularly for apples with vibration stress ($0.7{\mu}l/kg{\cdot}hr$ (1st stack), $0.78{\mu}l/kg{\cdot}hr$ (2nd stack), $0.96{\mu}l/kg{\cdot}hr$ (3rd stack)); whereas less ethylene was produced in control apples ($0.18{\mu}l/kg{\cdot}hr$ during storage. Also ethylene production rates of apples according to the stack position were significantly different ($p{\leq}0.05$). The vibration stress clearly accelerated the degradation of apple quality during storage, resulting in increased ethylene production.

• Journal of the Korean Applied Science and Technology
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• v.32 no.4
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• pp.748-757
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• 2015

This experiment was carried out the quality of astringent and dried persimmon according to various cultivars and harvesting time. There were need for proper selecting cultivar of astringent persimmon and knowing proper mature degree of persimmon in order to enhance the quality of dried persimmons. Immature persimmons showed lower moisture content, color value and higher hardness than riped and over-riped persimmons. The total quality of riped and over-riped fruit were superior than un-riped fruit.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1996.06c
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• pp.458-468
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• 1996

The Oil Palm industry has developed tremendously with the increasing of planted area from 54,000 hectaresin 1960 to about 2.28 million hectares in 1995. This is expected to increase further to 2.5 million hectares by the year 2000. However, there has been an increasing difficulty in obtaining sufficient labour for the oil palm plantations. At present , harvesting of oil palm fresh fruit is facing an acute shortage of workforce as the workers are much more attracted to the better working environment and salary in the industrial sector. Harvesting of short palm is easily done by using a chisel attached to a short steel pole. Cutting is done by moving the tool at high speed to the target. The weight of the tool coupled with the speed of throwing will produce enough energy to cut the bunch stalk. In this cutting method, sharpness of the cutting device, weight of tool and the speed of throwing contribute to the efficiency of the tool . For the tall palms, a sickle attached to a ong pole is used and the job is more difficult compared to the short palms. Lifting of pole and cutting jobs require great effort and skills. This paper describes the basic design needs in developing an appropriate device that is practical for field use. A prototype design was developed and tested.

• Journal of the East Asian Society of Dietary Life
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• v.4 no.3
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• pp.135-146
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• 1994

The study was conducted to research the desirable method for fermentation of acidic beverage in the farmhouse using peach dropped at harvesting periods. Step by step fermentation(SSF), complex fermentation after crushing of the fruit(CCF), complex fermentation after slicing of the fruit(SCF) and natural fermenation added yeast only after slicing of the fruit(SYNF) were compared. The brief stationary fermentor for complex fermentation in the farmhouse was made in this experiment. The ability of acid production, flavor, taste and color were measured by sensory evaluation and mechanical methods. The quality of vinegar by SYNF was the most desirable, estimated by the color, the flavor, the content and composition of sugar, and of organic acids, and which was a suitable fermentation method for the farmhouse. The strains of acetobacter SYNF-1, 2 and 3 were isolated from the SYNF vinegar, and the SYNF-1 was a main strain.

• Journal of Soil and Groundwater Environment
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• v.28 no.5
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• pp.51-58
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• 2023

In this study, an empirical experiment was conducted to assess the feasibility of replacing groundwater with rainwater in melon cultivation using a smart rainwater harvesting system. The rainwater harvesting efficiency was calculated under three different melon cultivation scenarios. After cultivation, the quality of the fruits grown with rainwater and groundwater was compared by examining the weight, degree of sweetness, and flesh hardness of the products. The results revealed that the water quality of the smart rainwater harvesting device was suitable for melon cultivation to provide better hardness and chloride levels than groundwater. It was also estimated that about 40% of the total water demand for full growth of the melon could be supplied by rainwater. The fruit weight and sweetness were equivalent or slightly better for the melons cultivated with rainwater than those cultivated with groundwater. In particular, the flesh hardness was significantly improved by rainwater cultivation. These results collectively suggest that rainwater can be used as a substitute for groundwater to preserve groundwater resources without compromizing the produced fruit quality.