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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Agricultural Science
Journal Basic Information
Journal DOI :
CNU Journal of Agricultural Science
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Volume & Issues
Volume 37, Issue 3 - Dec 2010
Volume 37, Issue 2 - Sep 2010
Volume 37, Issue 1 - Jun 2010
Selecting the target year
Herbicidal Activity of Rotation Crop Residues on Weeds and Selectivity to Crops
Uddin, Md. Romij ; Pyon, Jong-Yeong ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 1~6
Allelopathic activity of rotation crop residues to common weeds and selectivity of crops were studied for developing an alternative weed control strategy in upland organic farming. All rotation crop residues with various ratios suppressed weed growth, but the growth of crop species stimulated a little when those were grown with the mixture of rotation crop residues except a few crop species. Among the rotation crop residues used in this study hairy vetch was the most effective, followed by Chinese milkvetch, barley and rye in suppression of weed growth. The 90:10 (crop:soil, v/v) treatments incorporation rate of crop residues such as hairy vetch and Chinese milkvetch suppressed completely the growth of all weed species tested in this study. The effect of crop residues on suppression of weed growth reduced to 90% when the incorporation rates decreased to 60% [60:40 (crop:soil, v/v). It was noticed that broadleaf weed species were more susceptible to rotation crop residues than grass weed species. In the influence of crop residues on the crop growth, no growth inhibition was found in red pepper, lettuce and perllia at any incorporation rates, but tomato, cucumber and corn were slightly inhibited in a few cases at their highest incorporation levels. This study demonstrated that rotation crop residues especially hairy vetch and Chinese milkvetch have high herbicidal effects against weeds without inhibiting the growth of crop species.
Comparison of 'Kyoho' and 'Campbell Early' Table Grape Fruit Quality in Wholesale Market
Hwang, Yong-Soo ; Lim, Byung-Seon ; Kim, Jin-Gook ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 7~12
A significant difference in table grape quality was found between harvest seasons, producers and cultivars. In general, 'Kyoho' grapes showed much greater difference in fruit quality than 'Campbell Early'. The ratio of 'Campbell Early' grapes with poor quality (below quality standard within grades), was higher in fruit harvested early in the season, mainly because of immature fruit harvest. In 'Kyoho', poor quality of fruit seemed to be derived from the deviation of cultural practice between producers. Major factors responsible for poor quality in both cultivars includes harvest of unripe cluster, poor sorting and grading, berry abscission, and poor coloration. It is recommended to introduce a new quality standards considering the market condition in 'Kyoho' or a fresh-cut technology of grape berries for niche market.
Comparison of Fruit Quality among Fruits Set on Various Position within Cluster in 'Niitaka' Pears
Lee, Ug-Yong ; Oh, Kyoung-Young ; Shim, Hoon-Ki ; Lee, Hyuk-Jae ; Hwang, Yong-Soo ; Chun, Jong-Pil ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 13~18
In order to prepare the technical fundamental in production of premium quality fruits of 'Niitaka' pears, we compared the quality parameters and storability of the fruits that had various fruit set position in a cluster. The fruits set on
from basal part in fruit cluster had the largest fruit size. The weight of fruits set on the higher position than
from basal part in fruit cluster showed decreasing tendency. The production rates of marketable fruits which had 500g to 899g in weight were the high in
from basal part in cluster than those in other position. The differences of fruit height and diameter which represent balanced fruit shape also showed less difference in the fruits set on
from basal part in cluster than the fruits set closely on basal part in cluster. The fruits set on
from basal part in cluster showed lower rate in incidence of core breakdown and pithiness disorder during 4 months of cold storage than those on the closer position to basal part in cluster.
Residents Awareness Analysis for Climate Change Policy - Focus on Forest Sector of Daejeon Metropolitan City -
Oh, Do-Kyo ; Kim, Se-Bin ; Khark, Kyung-Ho ; Noh, Hee-Kyung ; Go, Young-Wung ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 19~25
The purpose of this study were to investigate the influence of residents awareness analysis for climate change policy. Nine items of residents' perceptions and opinions were designed from previous forest sector of Daejeon Metropolitan City. 241 questionnaires were obtained from interview survey in Hanbat arboretum in Daejeon. Forest sector were significant differences with socioeconomic variables of local residents. Providing detailed information on climate change and its impact on the local environment brings about greater awareness and better understanding of global warming amongst citizens which would eventually drive the people to give support to policy initiatives.
A Study on the Post Occupancy Evaluation of Urban Arboretum -Focused on The Daejeon Hanbat Arboretum-
Noh, Hee-Kyung ; Oh, Do-Kyo ; Kim, Se-Bin ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 27~35
A study examined visitors' satisfaction to urban arboretum in Daejeon metropolitan city, and analyzed utilization status. Also, the study was based on POE. POE is a last phase in the environmental planning and design process that follows the sequence of planning, programing, design construction, and use of a project. Urban arboretum contribute to improvement in the quality of living by providing urban citizens with places for refreshment, natural have important values on urban environment and to promote the quality of life for urbanite. So, the study aims to present data on the human activities responding to the physical environment of 'the Daejeon Hanbat Arboretum' by evaluating visitor's behavior and activity, visiting motivations, preference patterns, and the degree of visitor's satisfaction. This study is conducted by multi-method such as interviews and questionnaires surveys. On-site questionnaire surveys were conducted in the Hanbat arboretum on October 25-31 of 2009. Total of 265 questionnaires were analyzed for this study. The analysis of data was used SPSS 18.0 statistical analysis program. Data from visitors was analyzed by descriptive statistics, frequency analysis, multiple response analysis, and Anova. Then, the outcome will be compared and evaluated to install urban arboretum that reflect the desires of users in the future.
Development of Certification Program for Barrier-Free in Forest Trail
Kweon, Hyeong-Keun ; Choi, Yeon-Ho ; Kim, Myeong-Jun ; Yeom, In-Hwan ; Lee, Joon-Woo ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 37~43
This study carried out to develop barrier-free certification program in forest trail. It is done to provide the certification system presented about certification organized, certification standard and indexes, evaluation method and operation plan. In order to develop certification program in forest trail, detailed measurement index must be developed earlier based on an accessbility, a stability, a preservation and a walking continuity. The suitable forest trail for weak pedestrian was investigated that running slope should be 1/20(5%) maximum, cross slope cannot exceed 1/50(2%) maximum and clear tread width should be above of minimum 90cm. In addition, the trail type is designed as a mixed trail system which is a combination of the loop and the line form and its distance should be 225~675m. Finally, forest trail should be manage sustainably by having regular monitoring and evaluation.
Carbon Storages in Aboveground and Root of Pinus koraiensis and Larix leptolepis Stands in Gongju, Chungnam Province
Kang, Kil-Nam ; Park, Gwan-Soo ; Lee, Sang-Jin ; Lee, Hang-Goo ; Kim, Jun-Sung ; Kim, Yeon-Tae ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 45~52
This study has been carried out to estimate carbon contents in an average 40-years-old Pinus koraiensis plantations and an average 37-years-old Larix leptolepis plantations in Gongju, Chungnam Province. Average carbon concentration in stemwood, stembark, branches, needles, and root were 54.31% in Pinus koraiensis and 53.49% in Larix leptolepis stands. Carbon contents was estimated by the equation model logWt=A+BlogD where Wt is oven-dry weight in kg and D is DBH in cm. Total carbon contents was 103.38tC/ha in Pinus koraiensis stands and 96.59tC/ha in Larix leptolepis stands. Net primary carbon production was estimated at 8.79tC/ha/yr in Pinus koraiensis stands and 11.42tC/ha/yr in Larix leptolepis stands.
Effect of Bacillus subtilis PNG-4 with or without Lactobacillus acidophilus on malodorous gas emission of excreta in laying hens
Kim, Lee-Su ; Cha, Sang-Woo ; Cho, Sung-Kyung ; Kim, Sung-Bok ; Lee, Bong-Duk ; Lee, Soo-Kee ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 53~60
Two experiments were conducted to investigate the effect of probiotics on the malodor removal. In experiment 1, dietary effects (several malodorous gas concentration of excreta, dry matter metabolizability, and blood profiles) were determined using laying hens. A total of 30 Hy-line brown layers, 68-wk of age, were randomly allocated into 5 groups with 3 replicates of 2 birds each. The treatments were probiotics free, 0.2% and 0.4 % addition of mixed probiotics (Bacillus subtilis PNG-4 +Lactobacillus acidophilus LAS), and 0.2 and 0.4 % addition of single probiotics (Bacillus subtilis PNG-4). In experiment 2, the effects of mixing of probiotics into the excreta on the malodorous gas removal was investigated. There were three treatments (probiotics free, Bacillus subtilis PNG-4 +Lactobacillus acidophilus LAS, and Bacillus subtilis PNG-4) with three replicates. The malodorous gas concentrations were detected at 0, 3, 7 and 14 day of incubation. In experiment 1, ammonia concentration was significantly decreased by feeding mixed probiotics at 14th day of incubation. However, amines, hydrogen sulfide, ethylmercapthan, and methylmercapthan were not significantly affected by mixed probiotics. Dry matter metabolizability was significantly increased by feeding probiotics, but no significant differences between single and mixed probiotics. There was no significant differences in blood profiles. In experiment 2, mixing of probiotics into the excreta did not affect the concentration of ammonia, amines, hydrogen sulfide, ethylmercapthan, and methylmercapthan. Therefore, these experiments suggested that Bacillus subtilis PNG-4 + Lactobacillus acidophilus LAS supplementations could improve ammonia gas removal, and dry matter metabolizability in layers. Also, decrease of ammonia concentration was higher in mixed probiotics group compare to the single probiotics group. On the other hand, mixing of probiotics into the excreta appeared not to be a useful method.
A study on the development of high functional food protein ingredient from rice bran
Lee, Eui-Suk ; Kim, Ki-Jong ; Kim, Jae-Hyeon ; Hong, Soon-Taek ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 61~68
Rice bran proteins from different cultivars(Youngan, Sindongjin, Suwon 511) were extracted with Xylanase using orthogonal analysis method and their functional properties were investigated. The optimum extraction conditions, based on protein content in the extract found to be at 1 wt% xylanase, pH 7 and 50:1, solvent to rice bran ratio(v/w %). Nitrogen solubility indices(NSI) of rice bran protein concentrates were shown a minimum value at pH 4 ranged 2~23%, varied with different cultivars and a maximum (NSI
90% for all cultivars) at pH 10. As for water adsorption and fat adsorption capacity, rice bran protein concentrates were shown to be better than Na-caseinate and isolated soy protein, respectively. Emulsifying activities were observed high in order of Na-caseinate>Youngan rice bran protein>Shindongjin rice bran protein>Suwon 511 rice bran protein>isolated soy protein. In general, the surface tension of rice bran protein solution(
wt%, 5 mM bis-tris, pH 7) was increased with increasing concentrations and found a minimum value near pI. On heating, it was decreased slightly with increasing temperatures up to
and then increased above
. Addition of sodium chloride was made the surface tension decrease. In conclusion, with Xylanase, rice bran protein concentrate can be successfully extracted from the rice bran of different cultivars and the Youngan rice bran protein was thought to have best functionality among rice cultivars tested. It might be used as a milk protein substitute.
Change of solid fat index during interesterification of hydrogenated coconut oil
Shin, Jung-Ah ; Bae, Sang-Kyun ; Lee, Ki-Teak ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 69~72
This study explored the solid fat index (SFI) of structured lipids (SLs) synthesized by lipase-catalyzed (Lipozyme TLIM) interesterification using hydrogenated coconut oil (HCO), palm oil (PO) and palm stearin solid (PSS). SLs were produced using three blends of HCO/PO (60:40, w/w), HCO/PSS (40:60 and 60:40, w/w), and HCO/PO/PSS (32:48:18, w/w/w) to find a desirable confectionary fat by monitoring melting and crystallization behaviors of SFI of SLs using differential scanning calorimetry (DSC). SFI of HCO/PSS (60:40) and HCO/PO/PSS (32:48:18) at
were 70% and 68%, respectively. These results suggest that HCO/PSS (60:40) and HCO/PO/PSS (32:48:18) may be useful as potential SLs of a confectionary fat.
Components in Chinese Cabbage (Brassica rapa ssp. campestris) as Affected by Soil pH: 6.9 vs. 7.6
Jo, Man-Hyun ; Ham, In-Ki ; Lee, Eun-Mo ; Lee, Jo-Eun ; Jiang, Nan ; Lim, Yong-Pyo ; An, Gil-Hwan ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 73~80
Functional and nutritional components of 7 cultivars of Chinese cabbage (CC; Brassica rapa subspecies campestris) from China were analyzed to compare the effects of soil pH (6.9 vs. 7.6). The CC grew on the soil of pH6.9 (CC-6.9) contained significantly increased amounts (2.3~4-fold) of pectin, crude protein, vitamin C and vitamin E compared to the control. The contents of ash and minerals (Ca, Fe, Na, Zn, K and Mn) were also significantly increased in CC-6.9. However, CC-6.9 contained 16-75% lower contents of reducing sugars, cellulose and crude fat than CC-7.6. CC-7.6 contained more glucosinolates than CC-6.9; gluconasturtiin (20.68 vs. 0.84
wet wt) and gluconapin (202.55 vs. 0.15
wet wt). In conclusion, CC-6.9 had an improved texture (high pectin and low cellulose) and nutritional value (high in protein, Ca, Fe, Zn, vitamin C, and E), whereas CC-7.6 had better taste (high in reducing sugars) and anticancer functionality (high in glucosinolates).
Analysis of Thermal Characteristics for Areas of Musim Stream in Cheongju City
Park, Jin-Ki ; Na, Sang-Il ; Park, Jong-Hwa ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 81~86
The urban thermal environment can be an important index to detect heat island phenomena and manage it to improve urban life quality. Cheongju is a typical plain-city that main part has been formed and developed in lowland. The Mushim stream crosses the city from south to north. We reviewed the use of thermal remote sensing in stream around areas and the thermal environments, focusing primarily on the Urban Heat Island(UHI) effect. The purpose of this study is to determine the relationship between the stream nearby urban area and the stream cooling effect of UHI. The objectives are to determine the usefulness of KOMPSAT-2 bands MS3 and MS4 for vegetation cover mapping, and the usefulness of LANDSAT TM band 6 in identifying thermal environmental characteristics and UHI. Land Surface Temperatures (LST) are retrieved by single-channel algorithm to study the UHI from the 6th band (thermal infrared band) of LANDSAT TM images and thermal radiance thermometer based on remote sensing method and the LST distribution maps are accomplished according to the retrieval results. There is also comparison of satellite-derived and in situ measured temperature. The results indicated that the LST of urban center is higher than that of suburban area, the temperature of mountain and water are the lowest area, so it is clearly proved that there are obvious UHI effects by stream. The surface temperature distribution of Mushim stream is detected
lower than urban area.
Planting Properties of Porous Polymer Block Using Recycled Coarse Aggregates
Sung, Chan-Yong ; Kim, Young-Ik ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 87~96
This study was performed to evaluate the planting properties of herbaceous plant and cool-season grass in porous polymer blocks that were manufactured by using recycled coarse aggregates and unsaturated polyester resin to develop environmentally friendly planting blocks. Unsaturated polyester resin, natural and recycled coarse aggregates and
were used. The mix proportions were determined to satisfy the requirement for the workability and slump according to aggregate sizes(5-10 and 5-20mm). Tests for the void ratio and compressive strength of porous polymer concrete were performed at curing age 7 days. Also, porous polymer block using recycled coarse aggregates were applied to kinds of plants such as tall fescue, Perennial ryegrass, Lesedeza and Alfalfa. After seed, initial germination, germination ratio, cover view and growth length for planting blocks were estimated by various methods.
Improvement of Soft Ground by Using Recycled Aggregates
Lee, Dal-Won ; Lee, Jung-Jun ; Kim, Si-Jung ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 97~104
In this study, a laboratory model test on utilization of recycled aggregates and crushed stone as vertical drains to use alternative material of sand in soft ground is performed. The vertical and horizontal coefficient of permeability of the recycled aggregates and crushed stone showed largely 1.2~4.0 times and 3.0~3.3 times greater than sand, respectively. Therefore, it showed enough to be an alternative material to the sand which had been being used as the vertical and horizontal drainage material before. The variations of pore water pressure with time showed constantly regardless of the load in all vertical drainage materials. When water level drops suddenly, the pore water pressure of the recycled aggregate and crushed aggregate is reduced to nearly zero. Therefore, it was applicable to the field because discharge capacity was similarity to that of sand. The settlement in crushed aggregates and recycled aggregate decreases gradually with the load increase. When water level drops suddenly, earth pressure in all drains materials was evaluated the equivalent drainage capacity similarity to sand because it show approaching the nearly zero.
Development of Standardized Water Balance Model for Applying Irrigation District in South Korea
Noh, Jae-Kyoung ; Lee, Jae-Nam ; Kim, Yong-Kuk ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 105~112
The objective of this study is to develop a standardized model for analyzing water balances in large scaled water basin by considering agricultural water districts, and to evaluate the hydrological feasibility of applying this model to several water districts such as Nonbul, Geumbok, Daejeon 1, Daejeon 2, and Cheonggang in Geum river basin. Ten types of stream network were considered in developed model. Using this model, streamflows were simulated by major stations and water balances were analyzed by water districts. Simulated streamflows and measured streamflows were compared at check stations such as Gapcheon and Bugang stations in which Nash and Schcliffe's model efficiencies were 0.633, 0.902, respectively. This results showed its applicabilities to national water resources plan, rural water development plan, and total maximum daily load plan in Korea.
Development of Working Path Formation Program for Autonomous Tractor System
Seo, Il-Hwan ; Seo, Dong-Hyun ; Kim, Ki-Dae ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 113~121
Land consolidation ratio for rice paddy fields reached to 64.7% as of 2008 in Korea, and this also accelerated automation of field machinery. Especially, research on autonomous tractors has been continuously conducted. Tillage is one of the labor-, energy-, and time-consuming field operations. Most important requirements for autonomous tractors would be travelling path planning and electronic system to control the tractor to follow the path. The instruction of computer was required to conduct the tillage operation in field with unmanned traveling tractor. This instruction was coincidently used in the control of the traveling path and the motion of tractor. The objectives of the study were 1) to characterize and model tillage operating sequence, turning pattern, and 2) to develop tillage path formation programs for autonomous tractor and evaluate the performance.
Development of Steering Control System based on CAN for Autonomous Tractor System
Seo, Dong-Hyun ; Seo, Il-Hwan ; Chung, Sun-Ok ; Kim, Ki-Dae ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 123~130
A steering control system based on CAN(Controller Area Network) for autonomous tractor was developed to reduce duty of a central processing computer and to improve performance of steering control in terms of reduced control interval and error. The steering control system consisted of a SCU (Steering Control Unit), an EHPS system, and a potentiometer. The SCU consisted of an MCU (Micro Controller unit), an A/D converter, and a DC-DC converter, and a PID controller was used to control steering angle. The steering control system was communicated with the computer by CAN-bus. Each actuator and implement was connected to a multi-function board interfacing with the computer through a USB cable. Without CAN, control interval of the autonomous tractor was 1.5 seconds. When the CAN-based steering control system was combined with the autonomous tractor, however, control interval of the integrated system was reduced to those less than 0.05 seconds. When the autonomous tractor was operated with 1.5-s and 0.05-s control cycles at a 0.63-m/s travelling speed, the trajectories were close to straight lines for both of the control cycles. For a 1.34-m/s traveling speed, tractor trajectory was close to sine wave with a 1.5-s control cycle, but was straight line with a 0.05-s control cycle.
Review of Establishing Pre-Processing Facility of Agricultural Products - With a Case of Changwon Area -
Lee, Sang-Hak ; Lee, Han-Sung ; Choi, Se-Hyun ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 131~141
This paper aims to review how pre-processing facility of agricultural products can be established and operated. First of all, industry and its enterprises of pre-processing agricultural products are analyzed from the national perspective. Especially, five well-known pre-processing business units operated by producers' organizations are introduced including Ansung Machoom Agricultural Cooperative. Changwon City in Gyeongnam Province was chosen for a case study. Demand for local agricultural products by school feeding and other institutional food service in Changwon area is estimated and it is compared with the supply of agricultural products produced in the region. Questionnaire survey was done for school nutritionists and the main results are summarized. In the final stage, basic ideas for pre-processing facility of agricultural products in Changwon area are proposed considering the previous analyses. These ideas include size of the facility, participants and scope of the business, and location. Virtual profitability analysis is also conducted for the facility. Some suggestions for the proposed facility to be more successful in the future are suggested at the conclusion.
An Income Analysis of Large Scale Honey Bee Farming Farmhouseholds
Kim, Jai-Hong ; Lee, Byoung-In ; Lee, Sang-Cheol ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 143~149
This study analyzed the income of large scale honey bee farming of Korea. Using a questionnaire, 44 large scale honey bee farming farmhouseholds were surveyed. The average hive sizes are 258. The results are as follows. First, gross receipts of bee farming farmhouseholds are 50,342 thousand won, and it's components are honey 71%, bee selling and/or lent 26%. Second, working expenses are 23,778 thousand won that is 47% of gross receipts. Feed costs are 38.2%, material costs are 23.9%, hired labor costs are 11.0%, moving costs are 10.1%. Finally, receipts per hive are 195.1 thousand won, working expenses per hive are 23,778 thousand won, so income per hive is 103.0 thousand won.
Rural Residents' Demand for Rural Rent-House
Park, Yoon-Ho ; Koo, Seung-Mo ; Lee, Han-Sung ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 151~160
Housing is one of the most important factors determining the quality of rural life. Housing condition in rural area has been deteriorating over the past years in spite of many rural development programs. Korean government formulated 'Rural Housing Environment Improving Plan' including rural rent-house program in 2006. This study aims to find the fundamental intension of rural people for adopting the rent-house system in rural area. To do this, background and current state of rural rent-house program are presented and the demand for rural rent-house is analyzed based on the survey results done by Korea Rural Community Corporation in 2005. Major findings from the survey analysis imply that the size/age/ownership of the current houses and the age of householders, motive and time period of current residing, and components of households are significant factors when considering whether they are willing to apply rural rent-house.
Analysis on Food Material Industry in Korea
Kim, Soung-Hun ; Yu, Jung-Rim ;
Korean Journal of Agricultural Science, volume 37, issue 1, 2010, Pages 161~170
In Korea, food material industry encounters the emerging market which results from the growth of food service industry and food processing industry. Food material suppliers think that the total sales in Korean market may be around 20 trillion won. However, very small numbers of studies about Korean food material industry have been conducted. This paper analyzes the current status of food material industry and the market structure in Korea, and presents several suggestions for the development of Korean food material industry as following: building up the function of fresh-cut in production area, improving market structure, settling down the cold-chain system, enforcing the certification program for food safety.