• The Korean Journal of Pesticide Science
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• v.20 no.4
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• pp.312-318
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• 2016

This study investigated the reduction of residual pesticide in soil by using eight kinds of soil amendments such as shell, quick lime, dolomite, silicic acid, leaf mold, oil cake, bed soil and husk. A total of ten pesticides most frequently detected in agricultural soil were selected (azoxystrobin etc.) and soil amendments were treated in soils at a 2% application rate and incubated for 7 days. Pesticides were analyzed by HPLC-MS/MS with QuEChERS-based sample preparation procedure and pH was measured on 1, 3 and 7 days. This study showed that, soil amemdments were effective in reducing pesticides after 7days of incubation. Over 90% of azoxystrobin, cadusafos, chlorpyrifos, fluquinconazole, imidacloprid, isoprothiolane and procymidone were decomposed from soils amended with 2% quick lime, whereas the concentration of boscalid, dimethomorph and triycyclazole were not decreased. The soil pH increased to 12.8-12.9 in soil amended with quick lime, but other soil conditioners did not change the soil pH. Quick lime was particularly effective in reducing residual pesticides.

• Journal of the Korea Organic Resources Recycling Association
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• v.28 no.3
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• pp.37-44
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• 2020

The Project supporting organic fertilizer started in 1999 as a national policy. In farmhouse, over application of mixed organic compound fertilizer(OC) caused salt accumulation in plastic film house soil. To replace inorganic fertilizer with OC fertilizer, this study was investigated the effect of OC application on yield and soil chemical properties for lettuce cultivation in plastic film house. The OC fertilizer was applied at 50(OC50+N50), 100(OC100), and 150(OC150) % level of the basal amount of nitrogen fertilizer in soil testing recommendation. And these were compared to NPK(nitrogen, phosphat, and potash fertilizer) and PK treatment. The yield of lettuce in OC100 was similar to that of NPK treatment. In OC 50, 100 and 150 treatments, pH had a tendency to increase than that of NPK treatment. Nitrate nitrogen(NO₃-N) and electrical conductivity(EC) were similar to NPK treatment. These showed that nutrients from OC fertilizer were less likely to accumulate in soil than NPK. Also, use efficiency of nitrogen in OC100 treatment were similar to NPK treatment. These results suggest that OC application as the basal dressing at the 100% level could be best to prevent a nutrient accumulation of soil and to increase the yield and commercial quality for lettuce.

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.06a
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• pp.353-353
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• 2017

Rice yield of South Korea in 2015 was the highest of the last 30 years. It is important issue to establish food policy whether the historically highest yield in 2015 can be continued or just one-off event. Therefore, it is necessary to understand whether such a high yield as 2015 will be reoccurred. The aim of this study was to find out what climatic factor affect rice yield and how often these climatic factor could occur. For this study, the yield monitoring data from National Institute of Crop Science, Rural Development Administration and the meteorological data provided by Korea Meteorological Administration are used to identify the weather conditions could cause high yield, and how often these conditions occurred in the past. Our results indicated that such as high yield as 2015 could occur only when the mean sunshine hours of July and the mean sunshine hours from the end of August to early September was more than 5.1 hours and 6 hours, respectively. Mean sunshine hour of July may be related to grain number. The mean sunshine hour from the end of August to early September was presumed to relate to grain filling ratio. The relationship between monthly mean temperature and yield or yield component was not clear in this study. In this study, any cycle of high weather condition was not found. Therefore, the probability of high yield weather condition was expressed by frequency. The frequency of the sunshine hour, could make high yield, were 8/35 (23%) over the past 35 years. And the frequency of two years consecutive sunshine hour condition, which could cause high yield, was 1/35 (2.9%). The frequency of recurrence of sunshine hour making high yield within the next 5 years or 10 years after high yield weather condition were 4/35 (11.4%). After all, the high yield as much as yield of 2015 could not be one-off event. But it was not also consecutive event.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.59 no.3
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• pp.230-238
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• 2014

The purpose of this study was to develop the cost-effective and efficiency seed longevity prediction method of rice (Oryza sativa L.) germplasm for viability monitoring. To find an optimum predicting method for rice seed longevity at genebank, an accelerated ageing (AA) test, a controlled deterioration (CD) test and a dry-heat treatment (DHT) were conducted to the four groups of rice germplasm based on ecotype, such as Indica, Japonica, Javanica and Tongil type. Among the three artificial aging treatments, the dry-heat treatment of 36 hours at $90^{\circ}C$ is suggested as a routine predictive test method of rice germplasm longevity at a genebank. The distribution of germination rate on 3,066 accessions which conserved 26.5 years at $4^{\circ}C$ showed similar trend with the result of distribution by dry-heat treatment at $90^{\circ}C$ on 36 hours using 106 accessions of rice selected samples which composed four ecotype groups. The results show that the dry-heat treatment affect not only predicting the rice seed longevity but also determining effective interval for monitoring germination of rice germplasm in genebanks.

• Korean Journal of Food Science and Technology
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• v.50 no.2
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• pp.132-137
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• 2018

Enzymatic treatments of maize flour (MF) were investigated using commercial carbohydrases (Ultraflo L and Pentopan 500 BG) to enhance the phenolic acid content and antioxidant property. The total phenolic acid content of the MF was 3.76 mg/100 g, whereas those of the Pentopan 500 BG and Ultraflo L treated MF were 6.85 and 39.55 mg/100 g, respectively. Particularly, ferulic acid content of Pentopan 500 BG-treated MF was 20.0 times higher than that of untreated MF (1.7 vs. 33.9 mg/100 g). Pentopan 500 BG appeared to be more effective than Ultraflo L in increasing the free phenolic acid content. Antioxidant activities of enzyme treated MF were significantly higher than untreated MF. In particular, the Pentopan 500 BG-treated MF (16.0 mmol TE/100 g) was approximately 1.5 times higher than untreated MF (12.6 mmol TE/100 g). Enzymatic hydrolysis of cell wall polysaccharides in MF could be used as an effective procedure for not only increasing phenolic content but also antioxidant activities.

• The Korean Journal of Food And Nutrition
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• v.30 no.5
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• pp.1119-1126
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• 2017

Quality characteristics of commercially available soybean and mung-bean flours in Korea were evaluated relative to product information such as bean content, price, chromaticity, proximate composition, water binding capacity, swelling power and solubility. Origin of raw materials was 23 in domestic products and 19 in imported products. The price of the product was 3.48 times more for raw soybean flour, 3.34 times more for fried soybean flour, and 3.47 times more for mung bean flour compared to imported soybean. In the domestic products, the lightness of raw soybean flour was higher than roasted soybean flour. The redness and yellowness of roasted soybean flour were higher than raw soybean flour. Moisture content of raw soybean flour was higher than roasted soybean flour, and crude fat, crude protein and carbohydrate content were higher in imported soybean flour. Ash and crude protein contents of mung bean were slightly higher than imported products. Water binding capacity of roasted soybean flour in domestic products was higher than raw soy flour, and there was no significant difference in solubility and swelling power. Correlation between quality characteristics of commercially available soybean and mung-bean flours products was found to be highly significant among measured items, except for solubility.

• Korean journal of applied entomology
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• v.60 no.1
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• pp.135-143
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• 2021

Aerospace and geospatial technologies have become more accessible by researchers and agricultural practitioners, and these technologies can play a pivotal role in transforming current pest management practices in agriculture and forestry. During the past 20 years, technologies including satellites, manned and unmanned aircraft, spectral sensors, information systems, and autonomous field equipment, have been used to detect pests and apply control measures site-specifically. Despite the availability of aerospace and geospatial technologies, along with big-data-driven artificial intelligence, applications of such technologies to apple IPM have not been realized yet. Using a case study conducted at the Korea Apple Research Institute, this article discusses the advances and limitations of current aerospace and geospatial technologies that can be used for improving apple IPM.

• The Korean Journal of Community Living Science
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• v.21 no.2
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• pp.201-210
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• 2010

Over the past few decades, the proportion of elderly people in Korea has been rapidly increasing. In particular, rural areas are experiencing aging of communities more rapidly compared to urban areas. However, public policy for the elderly does not respond to the needs of rural elderly. To distribute health care resources equitably, it is necessary to gather reliable information on the health status of the elderly. The purpose of this study is to explore factors affecting Korean elderly people's ADL functional status. The data sources are from 2004 Elderly Living Condition Survey. The Analysis sample consists of 3,278 cases. Analysis results show that there is a significant residential variability in education, monthly stipend, living arrangement, subjective health status, regular food in-take, and regular exercise. Logistic regression analysis results also show that 'cognitive ability'(exp(B)=6.603), 'subjective health status'(exp(B)=4.576), 'age'(exp(B)=2.610), and 'living arrangement'(exp(B)=.589) are factors affecting ADLs. Namely, when a respondent's cognitive ability is limited, subjective health status is poor, or if their age is over 75, the probability of having a limited ADL has been 6.6 times, 4.6 times, and 2.6 times higher than otherwise. Among these variables, cognitive ability was the best explanation. In contrast, respondents who live with a spouse or adult children have a lower probability of having limited ADL compared with those who live alone. Considering that the most critical criteria in determining eligibility for social welfare services is ADLs, the development of appropriate ADL assessment tools is in an urgent need. Without the accurate assessment on ADLs, particularly on rural as well as the urban elderly, it seems to be hard to achieve effectiveness in the health care policy for the elderly.

• Journal of agricultural medicine and community health
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• v.16 no.2
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• pp.179-194
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• 1991

Despite its universal coverage of health insurance, the rural health insurance program(RHIP) stands at the crossroads in Korea. The RHIP has weaknesses in stability of financing, problems of inequities in the provision of health services and has suffered from high cost of running the program. The author has analyzed these problems from the perspective of health insurance policy and presented several options for improvement. First of all, this study urged the importance of a firm Governmental commitment of RHIP with the 50% subsidization of contributions as the Government had promised, instead of the current 40%. This can be justified from the 20% subsidization by the Government for the contributions of private school teachers and their dependents, who belong to richer segments of the population. Second, various cost containment measures ought to be sought curbing the rising demand for medical through strengthening health education and increasing individual responsibility, and tightening the claim review process. Third, this study requires the Government to run a demonstration project on the introduction of case payment system for primary health care. Fourth introducing an income-related cost sharing scheme is another possibility. Reforming the cost sharing formula for large medical expenditures is recommendable for a beginning. This measure can take the form of tax credit for medical expenditures of the poor. Fifth, the degree of financial adjustment among health insurance plans should be levelled up for enhancing stability of RHIP and social solidarity. Sixth, health policy should be redirected toward development of rural health resources and higher priority should be put on relieving difficulties in access to care. Seventh. the insurance plan owned-hospital needs to be developed or provision of health services in the medically underserved areas, and the need of such facilities is particularly acute for geriatric care, rehabilitation and renal dialysis, etc. Eighth, more generous insurance benefits are required of the elderly who are suffering the most : elimination of the maximum 180 days of benefit period and provision of glasses and artificial dentures, etc. Ninth. the economies of scale principle is working for the operating expenses of regional self-employed insurance plan. Thus, measures should be instituted to pursue an optimum size of health insurance plans. Lastly, excessive dependence on exclusion items is an evil so that some radical remedies are urgently required to cut them.

• Korean Journal of Agricultural Science
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• v.25 no.2
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• pp.329-342
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• 1998

As we have said major contents in the background of inducing Mutual Credits, Agricultural Cooperatives' Mutual Credits are absolutely necessary to the development of rural community. In real aspects, since it has been introduced, Mutual Credits have contributed greatly to the rural prosperity, as we have studied in the actual state of Mutual Credits. But with the advent of WTO system, both the international situation of open-trade policy and the domestic one of free banking and deregulation were rapidly going on at the same time, there by Mutual Credits' business has been threated by them. So Mutual Credits had to seek some programs for development in order to solve the hard situation. Several points on development programs of Mutual Credits are as follows: (1) Realization of scale of economy by the way of M&A among small primary cooperatives (2) Development of new financial products for raising funds safely (3) Management-rationalization by automatic systems like cash dispenser and telebanking (4) Variation of business area (5) Enforcing economy-business part besides Mutual Credits' one among cooperative businesses (6) Government's successive support.