• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
• /
• pp.129-138
• /
• 1993

The shortage of agricultural labour due to industrial growth has greatly induced the mechanization in Korean agriculture. However small and scattered land holdings have been the main constraints in the process of mechanization. This paper describes the interrelationships of farm land structure, machinery selection and machinery operation areas. The sandy silt loam irrigated paddy land having single crop a year was selected as a target areas for this study. Machine operation cost is greatly influenced by operation period, plot geometry and operation area. On the improved geometry plots, optimal machine size increases slowly with increase in operation area. Operable area increases due to increased effective machine capacity on better geometry plot. The difference between the effects of operation period and plot geometry is that in the former case, the cost reduction is caused by delay in increase of machine size, whereas in the latter case timeliness cost is reduced by increase ffective capacity. The effect of farmland consolidation is greater on small plots than that on big plots. Increasing wage rates have induced the adoption of more labor saving machinery. Bigger labor saving machines require enlargement of operation area and larger plots through improvement in farm land structure. Machine cost on poor plot geometry increases more rapidly than that on the good plot geometry and as operation area increases machine cost reduces significantly. It is concluded that the development of agricultural mechanization ion Korea will depend on the improvement in farm land structure and enlargement of operation area.

• 농업과학연구
• /
• 제32권2호
• /
• pp.127-150
• /
• 2005

Under the WTO system, the farm size expansion or the existing korean agricultural structure should be improved to cope with farm income decrease and to continue rice cultivation for food security in the future. This study is aimed at identifying optimum farm size under trade liberalization and import and export parity price system of inputs and outputs. The optimum farm size expressed the minimum point of long run average cost is determined as 15.1ha. The farm size to be equalized as urban laborer's income of 37,361 thousand won per year was revealed 30ha. Therefore the G't recommended farm size of 6ha should be changed to 30ha and the concerned policies for agricultural structure improvement also should be changed to more flexibilitiy.

• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2005년도 학술발표논문집
• /
• pp.102-107
• /
• 2005

All concrete structure in agricultural improvement project must satisfied durability, serviceability, safety. It is important for structure that satisfied these natures to good quality at design and construction step, and must continuous maintenance. Most of the concrete structures is construct at winter season, is contacted with water, has various type and sporadic in wide area. The objective of this study is to make the Concrete-Quality-Control diagram for agricultural infrastructure project using GIS. And, analyze the diagram with external factor(terrain, stream, economic etc.) to know the factor of concrete quality control.

• 한국정보통신학회논문지
• /
• 제10권7호
• /
• pp.1246-1252
• /
• 2006

최근 정보 매체들의 발달로 인해 소비자들이 식품문제에 대한 다양한 정보를 접하게 되면서 농산물의 안전성에 대한관심이 점차 높아지고 있다. 이런 가운데 국내의 농업환경은 농산물의 안전을 인증할만한 체계를 갖추지 못하고 있으며, 이런 상황이 계속 된다면 우리 농산물은 경쟁력을 잃고 외국 농산물들에게 시장을 내어주게 될 우려가 있다. 이에 본 논문에서는 농업환경을 개선하여 안전성이 높은농산물을생산하고투명한정보를제공하여 소바자들의 신뢰성을 높일 수 있도록 AIGT(Agricultural Information Gathering and Tracking) 시 스템을 설계 및 구현하였다. 또한, 국내 농업환경에 맞는 데이터 구조를 정의 하였으며, 효율적인 환경개선을 위해 모니터링과 화상회의를 도입하였다.

• 한국자원식물학회지
• /
• 제29권3호
• /
• pp.322-330
• /
• 2016

Understanding the genetic variation among landrace collections is important for crop improvement and utilization of valuable genetic resources. The present study was carried out to analyse the genetic diversity and associated population structure of 621 foxtail millet accessions of Korean landraces using 22 EST-SSR markers. A total of 121 alleles were detected from all accessions with an average of 5.5 alleles per microsatellite locus. The average values of gene diversity, polymorphism information content, and expected heterozygosity were 0.518, 0.594, and 0.034, respectively. Following the unweighted neighbor-joining method with arithmetic mean based clustering using binary data of polymorphic markers, the genotypes were grouped into 3 clusters, and population structure analysis also separated into 3 populations. Principal coordinate analysis (PCoA) explained a variation of 13.88% and 10.99% by first and second coordinates, respectively. However, in PCoA analysis, clear population-level clusters could not be found. This pattern of distribution might be the result of gene flow via germplasm exchanges in nearby regions. The results indicate that these Korean landraces of foxtail millet exhibit a moderate level of diversity. This study demonstrated that molecular marker strategies could contribute to a better understanding of the genetic structure in foxtail millet germplasm, and provides potentially useful information for developing conservation and breeding strategies.

• 농촌지도와개발
• /
• 제17권4호
• /
• pp.655-684
• /
• 2010

The objectives of this study were to review on the characteristics of the Agricultural Research-Extension Systems in the USA, Japan, and the Netherlands, and to draw up its implications on Korean agricultural extension system. This study was conducted by literature reviews. Based on the reviews, the following implications and recommendations should be considered at national and local level for improvement of agricultural extension system in Korea; (1) a systemic approach on the linkages of agricultural research, extension, and farmer education, (2) strengthening on-farm utilization of newly developed agricultural technology so as to promote agricultural research and development, (3) strategic partnership with agricultural administration, (4) close networking with stake-holders, (5) setting up the flexible organizational structure for carry out agricultural extension programs, (6) integration of agricultural extension service domain, (7) introduce a IPM(integrated performance management) system, (8) establish a long-term super-vision and strategic management, (9) setting up the customer-centered extension system.

• 한국프랜차이즈경영연구
• /
• 제2권2호
• /
• pp.70-83
• /
• 2011

농산물 수입개방에 따른 국제화에 대응하여 농사눌의 경쟁력 향상을 위한 농업의 구조조정의 필요성과 농산물 유통에 있어 농산물 제값받기, 공정거래, 능률 향상 등의 시대저 요청에 정부의 적절한 대응이 있어야만 한다. 이를 위해 공산물에 비해 보잡한 농산물의 유통구조를 효율적으로 변화시키고, 산지수집 단계에서부터 농산물 출하선택의 폭을 넓혀 안정적인 상품공급과 계획적인 생산체계를 유도하고 농산물의 원활한 수급조절과 판매 처리 능력을 확대하여야 한다. 또한, 유통과정에서 각종 부도덕한 상거래 행위를 근절시켜 유통정책의 효율적인 수립 및 집행을 위해 정확한 유통통계와 정보화가 필요하다. 농산물 유통구조 개선의 궁극적인 목적은 생산자에게는 상푸의 적정가격 보장과 생산의 극대화를 위한 시설개선이며, 소비자에게는 기호에 따라 적정가격의 최상푸질을 제공받는 것이다. 그러므로 경영의 효율성을 높여 단순히 유통비용 또는 마진을 낮추는 개선이 아닌 실제적인 구조조정을 통해 유통구조의 비용을 절감하여 최상의 생산품을 제공하여야만 향후 우리나라 농산물의 입지를 강화하고 소비자의 구매 욕구를 충족시킬 수 있을 것이다.

• Current Research on Agriculture and Life Sciences
• /
• 제5권
• /
• pp.205-220
• /
• 1987

The objective of this study is to examine the structure and transition of fertilization system in the 18th century. Especially, on the basis of this analysis, We can find the development of agricultural productivity in Chosun Dynasty. The improvement of fertilization method in the 18 century is found from all items -i,e-the time and object for fertilization, change of the concept in individual fertilizers. The transportation and the double - cropping of rice and barley in a paddy field had accomplished the improvement of fertilization method. Then, the development of agricultural productivity in a guarantee of higher fertilization method contributed directly to realize the consciousness of peasant's landownership.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.82-82
• /
• 2017

The production of spring wheat, the major crop in Mongolia, is accounting for 98% of the cultivated area. Collection, conservation and utilization of wheat germplasm resources play an important role in wheat breeding and production in Mongolia. Understanding genetic variability in the existing genebank accessions is important for collection and conservation of wheat germplasms. To determine the genetic diversity and population structure among a representative collection of Mongolian local wheat cultivars and lines, 200 wheat accessions were analyzed with 15 SSR markers distributed throughout the wheat genome. A total of 85 alleles were detected, with 3 to 5 alleles per locus and a mean genetic diversity value of 5.66. The average genetic diversity index was 0.68, with values ranging from 0.37 to 0.80. The 200 Mongolian wheat accessions were divided into two subgroups based on STRUCTURE, un-rooted NJ cluster and principal coordinate analyses. The results from this study will provide important information for future wheat germplasm conservation and improvement programs with Mongolian genebank.

• Plant Breeding and Biotechnology
• /
• 제5권3호
• /
• pp.183-191
• /
• 2017

Finger millet (Eleusine coracana L. Gaertn.) is an important cereal crop in eastern Africa and southern India with excellent grain storage capacity and the unique ability to thrive in extreme environmental conditions. In this study, we analyzed the genetic diversity and population structure of finger millet using 12 developed microsatellites. By sequencing 815 clones from an SSR-enriched genomic DNA library, we obtained 12 polymorphic SSR markers, which also revealed successful amplicons in finger millet accessions. Using the developed SSR markers, we estimated genetic diversity and population structure among 76 finger millet accessions in Asia, Africa, and unknown origins. The number of alleles ranged from 2 to 9, with an average of 3.3 alleles. The mean values of observed heterozygosity and expected heterozygosity were 0.27 and 0.35, respectively. The average polymorphism information content was 0.301 in all 76 finger millet accessions. AMOVA analysis showed that the percentage of molecular variance among the populations was 1%, that among individuals was 5%, and that within individuals was 94%. In STRUCTURE analysis, the 76 finger millet accessions were divided into two subpopulations which had an admixture of alleles. There was a correspondence among PCoA, AMOVA, and population structure. This study may form the basis for a finger millet breeding and improvement program.