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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Agricultural Science
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Journal DOI :
CNU Journal of Agricultural Science
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Volume & Issues
Volume 42, Issue 4 - Dec 2015
Volume 42, Issue 3 - Sep 2015
Volume 42, Issue 2 - Jun 2015
Volume 42, Issue 1 - Mar 2015
Selecting the target year
Relationship between rice grain quality traits and starch pasting properties using early maturing rice cultivars in Chungnam plain area
Yun, Yeo-Tae ; Chung, Chong-Tae ; Lee, Jae-Chul ; Lee, Young-Ju ; Na, Han-Jung ; Lee, Kwang-Won ; Yoon, Young-Hwan ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 151~158
DOI : 10.7744/cnujas.2015.42.3.151
This study was conducted to know the variation and relationship of rice grain quality and starch pasting properties by transplanting times. Two early maturing rice cultivars which accounted for the most area of early maturing rice cultivar in Chungnam province were used. The experiment was laid out in a split-plot design with 3 replications. The main plot consisted of three transplanting times viz. early (April 25), ordinary (May 25) and late (June 25) with sub-plots containing two cultivars. According to the transplanting times, most of rice grain quality and starch pasting properties showed significant difference and Joami showed higher grain quality than Unkwang in all transplanting times. Especially, rice grain quality was improved when transplanted late, showing high head rice and glossiness of cooked rice due to the lower mean temperature during grain filling stage. Glossiness of cooked rice was positively correlated with head rice ratio, amylose content and setback value, and negatively correlated with chalky rice ratio and protein content. The highest positive and negative correlation were observed between breakdown value and peak viscosity ($r
Influence of insect pollinators on gene transfer from GM to non-GM soybeans
Lee, Bumkyu ; Kim, Jun Hyeong ; Sohn, Soo In ; Kweon, Soon Jong ; Park, Kee Woong ; Chung, Young Soo ; Lee, Si Myung ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 159~165
DOI : 10.7744/cnujas.2015.42.3.159
The cultivation area and use of genetically modified (GM) crops have been increased continuously over the world and concerns about the potential risks of GM crops are also increasing. One of the major concern in risk assessment is the possible development of hybrids through interspecific and intergeneric crosses with related species. This study was conducted to investigate the pollinator have an influence on insect-mediated gene transfer from GM soybeans. Hybrid was induced from GM soybeans by honeybee and western flower thrips, and non-GM soybeans were used as pollen receptor. The analysis for gene-flow was conducted by herbicide selection, immunostrip test, and PCR analysis. In the result of the analysis, three hybrids were detected on the distance 15, 75, 105 cm from pollen source in western flower thrips treatment. In honeybee treatment, one hybrid was detected in the farthest distance (300 cm). These results suggested honeybee and western flower thrips have a possibility they can transfer the introduced gene from GM soybeans to non-GM soybeans.
Variations of glucosinolates in kale leaves (Brassica oleracea var. acephala) treated with drought-stress in autumn and spring seasons
Jeong, Na-Rae ; Chun, Jin-Hyuk ; Park, Eun-Jae ; Lim, Ye-Hoon ; Kim, Sun-Ju ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 167~175
DOI : 10.7744/cnujas.2015.42.3.167
The present study aimed to investigate the effects of drought stress on the accumulation of glucosinolates (GSLs) in the leaves of Kale cultivated in autumn and spring. HPLC analysis guided to identify seven GSLs including progoitrin, glucoraphanin, sinigrin, gluconapin, glucobrassicin, 4-methoxyglucobrassicin and neoglucobrasscin. Quantification of GSLs revealed that the contents of sigirin was the highest (45%) followed by the level of progoitrin (24%) in terms of total GSLs. The ranges of total GSL contents was 1.16 (84)-15.88 (89 DAS,
dry wt. (DW)) in treatment plot and 1.23 (84)-7.05 (74 DAS,
dry wt.) in control plot showed the enhancement in the contents of GSLs in treatment than in the control plot. The present results evidenced that the variation of total GSL contents were depending on the harvest period. In 105 DAS, comparatively no differences in the GSL contents on each sample in autumn season, whereas in spring season, although there was decrease in the GSLs tendency from 74 DAS to 84 DAS in both control and treatment plot, the GSL contents of treatment plot was dramatically increased in 89 DAS. In treatment plot, the GSL contents on 89 DAS (1.16) was 15 fold higher to 84 DAS (
DW). The variation in the contents of GSL in spring and autumn did not documented significant differences because of their differences in the growth time and cultivation conditions. In conclusion, the GSL contents in kale was likely to be affected by drought stress treatment. Scrutiny and further research for exact relation between drought stress and GSL contents in kale should be needed.
Characteristics of compost produced in food waste processing facility
Lee, Chang-hoon ; Park, Seong-jin ; Kim, Myeong-sook ; Yun, Sun-gang ; Ko, Byong-gu ; Lee, Deog-bae ; Kim, Sung-chul ; Oh, Taek-Keun ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 177~181
DOI : 10.7744/cnujas.2015.42.3.177
Food waste has been widely considered as a recycling resource to be applied to agricultural lands due to the effects of organic matter and nutrient for plant productivity. but the maturity and salt concentration in the compost produced from food waste processing facilities should be considered firstly, which was little information on compost quality produced from food waste treatment facility. In this study, we examined actual situation of food waste processing facility on the composting of food waste and evaluated the characteristics of composts produced from food waste processing facilities. The quality of composts was analyzed on the basis of the criteria of fertilizer processing manual. The 46% of food waste treatment facility registered composting produced actually the compost mixed with food waste or animal waste. The compost maturity and salt concentration as indicators of the quality of compost were not met 46.8% of composts collected from food waste processing facilities to the criteria of fertilizer processing manual. Also, 15.6%(moisture) were not satisfied with the criteria. In conclusion, the compost produced from food waste processing facilities is firstly required with better compost maturity and reduced salt concentration in order to use to agricultural lands as an amendment.
In-situ estimation of effective rooting depth for upland crops using hand penetration of cone probe
Han, Kyung-Hwa ; Zhang, Yong-Seon ; Jung, Kang-Ho ; Cho, Hee-Rae ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 183~189
DOI : 10.7744/cnujas.2015.42.3.183
Plant root penetration through soil profile is restricted by compacted layer such as plow pan under conventional tillage. For detecting the compact layer, we made a graduated T-shape probe and measured compared between the depths with rapid change in feeling hardness of hand penetration using T-shape probe and with a rapid increase of penetrometer cone index. On upland crops, including red pepper, corn, soybean and cucumber, plow pan depth ranged from 10 cm to 25 cm depth. The effective rooting depth (ER) had significant correlation with the plow pan depth (PP) except soils with the shallow ground water and/or poorly drained soil. The regression equation was ER
Characteristics of composition and surface morphology of soil particles influenced by inorganic acids with different acidity
Lee, Dong-Sung ; Lee, Kyo-suk ; Shin, Ji-Soo ; Lee, Jae-Bong ; Joo, Ri-Na ; Lee, Myong-Youn ; Min, Se-Won ; Chung, Doug-Young ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 191~199
DOI : 10.7744/cnujas.2015.42.3.191
We conducted this research to observe the changes of surface morphology and composition of clay minerals influenced by various concentrations of fluoric acid. Hydrofluoric acid (HA), a solution of hydrogen fluoride (HF) in water, is a colourless solution that is highly corrosive, capable of dissolving many materials, especially oxides. To do this, we treated several concentrations of HA on the ground soil samples collected from the agricultural experimental station located at Chungnam National University to observe the influence of fluoric acid on the changes of surface structures and elemental composition of clay particles. Generally, microscopic examination showed that the HA can not only attack an edge of clay particles but also start at any point where structural defects and weaknesses predisposed sites to acid. The orderly flake arrangement of clay minerals may reflect certain crystal symmetry elements. The ESEM-EDS results of element composition of clay particles influenced by HA indicated the changes of structures of clay minerals. It is also clear from the formation of etch figures and element composition of clay particles that the product layer at least partially dissolved or disintegrated in the presence of acid. Conclusively, the clay structures can be strongly influenced by concentrations of HA, resulting in changes of physical and chemical properties that can determine the behavior of solute transport as well as mobility of ions in soils.
Effects of pathogenic E. coli on diarrhea, growth performance, and blood profile of weaned pigs
Song, Minho ; Jang, Yoontack ; Kim, Younghwa ; Park, Juncheol ; Kim, Younghoon ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 201~205
DOI : 10.7744/cnujas.2015.42.3.201
The experiment was conducted to evaluate the effects of pathogenic Escherichia coli on diarrhea, growth performance, and blood profile of weaned pigs. A total of 48 pigs were used and housed in individual pens of disease containment chambers for 16 d (4 d before and 12 d after the first challenge [d0]). The treatments were with or without the pathogenic E. coli challenge (F-18 E. coli strain; heat-labile, heat-stable, and Shiga-like toxins). Pigs were orally inoculated with a dose of
E. coli per 3 mL PBS daily for 3 days. The common nursery diet and water were available at all times. The ADG, ADFI, G:F, diarrhea score, ratio of fecal
-hemolytic coliforms from total coliforms (RHT), and blood profile were measured. The pathogenic E. coli reduced (P < 0.05) ADG from d0 to 6 (117 vs. 297 g/d) and from d0 to 12 (377 vs. 238 g/d) compared with the control. Meanwhile, the pathogenic E. coli increased (P < 0.05) diarrhea score (average 3.4 vs. 1.4) and RHT (average 82 vs. 11%) on d3, 6, and 9 and the number of white blood cells (17.59 vs.
) on d6 compared with the control. No differences were found on ADFI and others in the blood profile (total protein and hematocrit). In conclusion, pathogenic E. coli used in this experiment successfully caused mild diarrhea, increased number of white blood cells, and adversely affected growth rate of weaned pigs.
Value of spray-dried egg in pig nursery diets
Song, Minho ; Kim, Sheena ; Kim, Younghwa ; Park, Juncheol ; Kim, Younghoon ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 207~213
DOI : 10.7744/cnujas.2015.42.3.207
High-quality protein ingredients have been used in nursery diets, in spite of expensive ingredients, to minimize nutritional deficiency and disease problems. Recent dramatic increases in prices of protein products for nursery diets have exacerbated the challenge. Spray-dried egg may be a part of the solutions. Therefore, this review describes the value of spray-dried egg in nursery diets as a high-quality protein source. Spray-dried egg is egg by-product and is produced by only eggs without shell that are below the USDA Grade B standards. Spray-dried egg is an excellent nutrient source: 1) highly digestible, 2) excellent balance of amino acids, 3) rich content of fat, and 4) high metabolizable energy. These can be attributed to growth of nursery pigs. Beyond the provision of bioavailable nutrients, spray-dried egg also may provide specific physiological benefits. Spray-dried egg contains 1) immunoglobulin antibodies (IgY: IgG in egg yolk) that may attach to intestinal pathogens and excrete them and 2) lysozymes antimicrobial protein that can damage bacteria cell wall. Thereby feeding spray-dried egg may reduce concentration of intestinal pathogen and thus improve potential gut health or enteric disease resistance in nursery pigs. This is important for physiologically immature weaned pigs. Based on these benefits, spray-dried egg is believed to have the same benefits as spray-dried plasma protein and milk products in diets for nursery pigs. Therefore, it is suggested that spray-dried egg has a great potential as a valuable protein source in nursery diets.
A study for implementation of monitoring system for genetic improvement of swine breeding stock
Do, Chang-Hee ; Yang, Chang-Beom ; Choi, Jae-Gwan ; Yang, Boh-Suk ; Song, Hyung-Jun ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 215~222
DOI : 10.7744/cnujas.2015.42.3.215
This paper sketches the strategies and designs for monitoring system of swine genetic improvement. The system should reflect every side of pig production. The system leads us to assess the efficiency of pig production and the scope of the system includes not only nucleus, multiplying and commercial herds, but also packing and processing sectors. For more accurate statistics, data for this monitoring system must be collected from all above mentioned areas, but not by random sampling. Futhermore, data analysis results including seedstocks and distribution information of genetic trend should be included in the system. The schema of knowledge database system could be employed in the system. The monitoring system in the final destination would unify the systems derived from various sources and provide any solution in swine industry including pig breeding.
Investigation on changes in pig farm productivity after ban of antibiotics growth promoter in commercial mixed feed
Kim, Ki-Hyun ; Cho, Eun-Seok ; Kim, Kwang-Sik ; Kim, Jo-Eun ; Seol, Kuk-Hwan ; Park, Jun-Cheol ; Kim, Young-Hwa ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 223~229
DOI : 10.7744/cnujas.2015.42.3.223
This study was conducted to investigate the changes in the pig productivity after ban of antibiotics growth promoter in commercial pig farms. A total 74 pig farms that herd size is from less than 100 sows to more than 500 sows were selected for survey. Changes of pig productivity before/after ban of antibiotics were analyzed by comparing with our survey results and report of KPPA (Korean Pork Producers Association, 2013). In the results, no difference on pig productivity was observed by herd size among our survey farms. Live born piglets have been raised as time passes since 2003, and then it reach to 10.6 head per sow in 2012. The numbers of weaning piglet tended to increase, but sow turnover ratio was found to be a tendency to decrease after ban of antibiotics in our survey results. There was no effect of using antibiotics on mortality of pre- and post- weaning. Marketing per sow per year (MSY) does not be improved because the post-weaning mortality was maintained at a high level, despite live pig born and weaning piglet have increased after 2003. In conclusion, a ban of antibiotics growth promoter does not directly affect to pig productivity, but it needs the efforts to reduce the mortality of post-weaning for improvement of pig productivity. We suggest that this data will be useful to swine industry as the fundamental information.
Effect of mixing with non-familiar piglet on change of body temperature
Kim, Kwang-Sik ; Cho, Eun-Seok ; Kim, Young-Hwa ; Kim, Jo-Eun ; Seol, Kuk-Hwan ; Kim, Ki-Hyun ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 231~235
DOI : 10.7744/cnujas.2015.42.3.231
This study was performed to investigate the change of the body surface temperature during socialization of weaning pigs. A total of 108 piglets (Landrace 60 and Yorkshire 48) aged 31 (
) day was used for this study. Experiment was designed as follows; familiar group (T1), randomly mixed with unfamiliar piglets (T2), mixed based on weight of unfamiliar piglet (T3). The transport and mixing of pigs were performed at 10:00, and then body surface temperature was taken by thermo-graphic camera after 4 hours (14:00). Average surface temperature and hot-spot-temperature, which is the hottest spot of the body surface, were analyzed using Testo IRsoft 3.1 software. Average temperature of body surface were 36.0, 38.2, and 37.5 in T1, T2, and T3, respectively. Average of body surface temperature in T2 and T3 were higher (p<0.001) than T1, and average temperature of body surface of T3 was greater (p<0.001) than that of T2. The hot-spot-temperature of T1, T2, and T3 were 38.7, 39.5, and 39.6, respectively. The hot-spot-temperature of T2 (p<0.01) and T3 (p<0.001) were significantly higher than that of T1. Above results demonstrate that grouping unfamiliar pigs leads to increase in the body temperature possibly by pigs aggressive behavior during social conflict. By the result on average body temperature, this study suggests that the mixing with similar body weight would increase the struggle time and frequency.
Effects of CNCPS fraction-enriched proteins on ruminal fermentation and plasma metabolites in holstein steers fed TMR containing low protein
Choi, Chang Weon ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 237~244
DOI : 10.7744/cnujas.2015.42.3.237
Four ruminally cannulated Holstein steers (BW
) fed TMR containing low protein (CP 9.63 %) as a basal diet were used to investigate the effects of cornell net carbohydrates and protein system (CNCPS) fraction enriched protein feeds on rumen fermentation and blood metabolites. The steers used in a
Latin square design consumed TMR only (control), TMR with rapeseed meal (AB1), TMR with soybean meal (B2) and TMR with perilla meal (B3C), respectively. The protein feeds were substituted for 30 % crude protein of TMR intake. For measuring ruminal pH, ammonia-N and volatile fatty acids (VFA), ruminal digesta was sampled through ruminal cannula at 1 h-interval after the afternoon feeding. Blood was sampled via the jugular vein after the ruminal digesta sampling. Different CNCPS fraction-enriched proteins did not affect (p>0.05) ruminal pH except B3C being numerically low compared with the other groups. Ammonia-N and VFA were not significantly different among the experimental groups. Numerically low ammonia-N appeared in the steers fed rapeseed meal even though it contained high soluble N composition (A and B1 fractions). The discrepancy is unclear; however this may be related to low protein level in the diet and/or low DM intake. Blood metabolites were not significantly affected by the protein substitution except for blood urea nitrogen that was significantly (p<0.05) increased.
A study on the relationship between the longevity and profitability of dairy cattle
Do, Chang Hee ; Cho, Jae Sung ; Cho, Kwang Hyun ; Yang, Boh Suk ; Yun, Ho Baek ; Lee, Ji Su ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 245~251
DOI : 10.7744/cnujas.2015.42.3.245
Records of 490,767 cows collected from 1990 to 2012 by dairy herd milk test of National Agriculture Cooperative Federation The pedigree of dairy cattle were provided by Korea Animal Improvement Association. The data were used to analyze the longevity of dairy cows with the life traits such as days in milk, number of lactation, productive life, and life span. The data were also used to investigate genetic relationship of these longevity traits with profitability of dairy cows, including heritability and genetic correlation. The profitability was calculated with simulation of milk income and production costs for individual cows. Days in milk among the traits had -0.287, -0.572 and -0.536 of genetic correlation with number of lactations, productive life and lifespan, respectively. The heritabilities of life span, number of lactations, productive life, and days in milk were found to be 0.045, 0.047, 0.059 and 0.081, respectively. Genetic correlations of profit with productive life, number of lactations, and days in milk were identified as 0.072, 0.080, 0.098 and 0.101. These results suggested that days in milk was most desirable traits to represent longevity of Holstein dairy cattle. In general, since longevity and profitability were close genetic relationship each other, genetic improvement of longevity is necessary for better profitable cows.
Effects of zinc, vitamin and selenium additives for improving meat quality on the growth performance, carcass characteristics and economic efficiency of holstein steers
Cho, Won Mo ; Lee, Sang Min ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 253~259
DOI : 10.7744/cnujas.2015.42.3.253
This study was conducted to investigate the effect of different additives on the growth performance, feed efficiency and carcass characteristics in Holstein steers during 18month fattening periods. Twenty four Holstein steers, 5months of age and 176.6kg, were randomly allocated to 3 experimental groups 8 animals each for 18-months feeding trial. The groups were control (not additive), T1 (fed zinc, Vitamin C) and T2 (fed zinc, Vitamin C, Vitamin B6 and Selenium). According to feeding additives, final weight was not significantly different among the treatment groups, tended to be high at T2 group (827kg) compared to the other groups. Average daily gain was not different among the treatment groups during the experimental periods, but T2 group was significantly greater than T1 group in growing stage (p<0.05). The feed additives had no effects on DMI during experimental periods. Feed conversion ratio of T1 group in growing stage was significantly higher than those of other groups (p<0.05), average feed conversion ratio was tend to be decreased at T2 group rather compared with other groups. In the results of yield traits, carcass weight were relatively higher in T2 group than other groups (p<0.05). Rib-eye area, back fat thickness and yield index were similar between groups. In quality traits, marbling, meat color, fat color, texture and maturity were not significantly different among the groups. In economic efficiency, income was highest at T2 group as 91~393 thousand won among 3 groups.
Effects of high energy diet on growth performance, carcass characteristics, and blood constituents of final fattening Hanwoo steers
Chung, Ki Yong ; Chang, Sun Sik ; Lee, Eun Mi ; Kim, Hyun Ju ; Park, Bo Hye ; Kwon, Eung Gi ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 261~268
DOI : 10.7744/cnujas.2015.42.3.261
The aim of this study was to examine the effects of high energy diet on growth 26mon, 28mon, and 30mon in Hanwoo at different ages. High energy diet required not only an amount of concentrate on days of fattening periods but also induced cost for the management. We hypothesized that high energy diet was able to reduce a fattening period to reach a certain quality grade. A
factorial arrangement (High energy, control vs 26, 28, 30month endpoints) in a completely random design was used to feed 48 Hanwoo steers. Four steers were fed in same pen and 12 pens were used for treatment. Blood was drawn from each steers on every other months during early, middle, and final fattening periods. Over all ADG and feed efficiency were not different between high energy and control diet (P > 0.05). Dry matter intake was induced 30 mo-old early and final fattening periods at high energy diet. Serum glucose concentration were increased (P < 0.05) at 30 and 26month old steers. Marbling scores were greater at 30 month old than 26 and 28 month old Hanwoo steers. Carcass weight of Hanwoo steers were greater at 30 mon-old groups than other groups. These result indicated that high energy diet (+3% TDN) and slaughter endpoint collectively contribute to the observed quality grade compositional differences among three final fattening periods of Hanwoo steers.
Application trend of unmanned aerial vehicle (UAV) image in agricultural sector: Review and proposal
Park, Jin-Ki ; Das, Amrita ; Park, Jong-Hwa ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 269~276
DOI : 10.7744/cnujas.2015.42.3.269
Unmanned Aerial Vehicle (UAV) has several advantages over conventional remote sensing techniques. They can acquire high-resolution images quickly and repeatedly. And with a comparatively lower flight altitude, they can obtain good quality images even in cloudy weather. In this paper, we discussed the state-of-the-art of the domestic and international use of UAV in agricultural sector as well as assessed its utilization and applicability for agricultural environment in Korea. Association of robotic, computer vision and geomatic technologies have established a new paradigm of low-altitude aerial remote sensing that has now been receiving attention from researchers all over the world. In a field study, it has been found that use of UAV imagery in an agricultural subsidy program can reduce the farmers` complain and provide objective evidence. UAV high resolution photography can also be helpful in monitoring the disposal zone for animal carcasses. Due to its expeditiousness and accuracy, UAV imagery can be a very useful tool to evaluate the damage in case of an agricultural disaster for both parties insurance companies and the farmers. Also high spatial and temporal resolution in UAV system can increase the prediction accuracy which in turn help to maintain the agricultural supply and demand chain.
An analysis of determinants of non-farming income activities of female farmers: Focused on female farmers of Chungnam area
Ahn, Soo Young ; Kwon, Yong Dae ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 277~283
DOI : 10.7744/cnujas.2015.42.3.277
This study aims at analyzing determinants of non-farming income activities of female farmers, and presenting how to support their participation in non-farming activities. The result of logistic regressive analysis whose subjects are female farmers in the Chungnam area indicates that human and economic capital variables that can predict non-farming income activity participation statistically significantly are persons at the age of 40s to 50s and female farmers who returned to the rural areas. Farming characteristic variables are households that receive subsidiary and participate in two different types of farming whose main farming is rice. The female farmers who spend longer hours doing household chores participate in non-farming income activities more actively. In terms of policy and on-site response variables, the interest in farming and farming businesses shows positive relation, and that of farming and community organization participation presents negative relation. These analysis results indicate that the local government must present the policy that can select non-farming income activity participation groups strategically. This study suggest that it is necessary to expand community centered-non-farming income activities, and to expand or make laws to support female farmer`s participation in non-farming activities.
An analysis on the production cost and marketing margin of food: Tofu and Kimchi
Kim, Yonggyu ; Kim, Sounghun ;
Korean Journal of Agricultural Science, volume 42, issue 3, 2015, Pages 285~291
DOI : 10.7744/cnujas.2015.42.3.285
Many Koreans have the question about the price of food: whether the price of Korean food is reasonable or not? Even though some previous studies tried to discuss and analyze the price system of Korean food, few papers clearly present the implication about production cost or marketing margin of processing food. The purpose of this paper is to measure and analyze the production cost and marketing margin of tofu and kimchi, which are one of the main food in Korea, through the raw-data of FIS, KAMIS, and other data from Korean business area. The results of studies present a few findings as follows: First, the proportion of labor cost in the production cost is very important factor and need to be decreased for the lower consumer price. Especially, the lower proportion of labor cost in kimchi industry should be important issue, even though the reduction of proportion of labor cost in kimchi industry is not easy in the real world. Second, each marketing channel of processed food shows different marketing margin. Therefore, Korean government need to increase the level of competition of marketing channels, which makes each business is forced to decrease the marketing margin to survive the market competition in Korea.