• Korean Journal of Soil Science and Fertilizer
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• v.38 no.5
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• pp.294-300
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• 2005

The effect of hairy vetch sod culture on reduction of soil loss and providing of nitrogen was investigated for the fields of Chinese cabbage in Hoenggye-Ri, Pyeongchang-Gun Gangwon-Do (780 m above sea level) from 2002 to 2003. Hairy vetch was sowed at just before planting, 15, 30 and 40 days after planting and right after harvest of Chinese cabbage. Hairy vetch was sod-cultivated with Chinese cabbage. The amount of sowing was $40kg\;10a^{-1}$. In this experiment, proper sowing times that had no influence on the yield of Chinese cabbage were 30 and 40 days after planting while other sowing times led to decrease the yield. In case of the former, there was 74% reduction effect of soil loss compared with no-hairy vetch because of covering the fields with hairy vetch right after harvest. Moreover, when the hairy vetch was put into the soil before planting of Chinese cabbage in the next year, it showed 61-79% substitution effect of standard application rate ($320kg\;ha^{-1}$, chemical fertilizer) for nitrogen fertilizer. It is suggested that using hairy vetch as cover crop would be useful in conservation of soil loss and reduction input of agricultural materials.

• Journal of Life Science
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• v.21 no.10
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• pp.1466-1472
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• 2011

We characterized embryo early gene (EEG)-704 promoter of the silkworm Bombyx mori, which is specifically regulated in the development stages. To determine core promoter region, 10 different partial mutant clones were tested by luciferase assay in Sf9 cells. About 1.5 kb promoter shows higher luciferase activity than constitutive promoter (BmA3). Interestingly, EEG-704 shares the same DNA sequences with BmHsp20.8 by the result of BLAST analysis; its expression is also increased under heat shock condition. Development of such promoter inducible, directly or indirectly in the developmental-stage, is very useful in making recombinant proteins in transgenic silkworms.

• Korean Journal of Medicinal Crop Science
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• v.2 no.2
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• pp.140-145
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• 1994

B. falcatum plants were classified into six groups from group I to grop VI by the complete linkage cluster method depending on 8 charactenstics such as plant height. number of nodes, number of branches, position of the first branching node root diameter, root length, number of lateral root, dry weight of root. These groups are divided into two plants types, such as multi-branching and non multi-branching type by the number of branches, group II and group VI were the multi-branching types and the other groups were nonmulti-branching ones, Dry weight of root had highly positive correlation with the number of branches and negative correlation with the position of first branching nodes.

• Journal of The Korean Society of Grassland and Forage Science
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• v.31 no.1
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• pp.47-54
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• 2011

This experiment was carried out to know adaptability and forage production and quality of corn hybrid for silage at paddy field of Jeonnam and Cheonan region. The growth, forage production and quality of silage corn in normal condition showed much better than drought condition at paddy field. Among the growth characteristics, 'Kangdaok' hybrids was somewhat strong for drought stress, then and good at stem diameter, drought stress, sugar content, stay green, disease and insect resistance. Fresh yield of 'Kwangpyongok' and 'Kangdaok' hybrid at drought paddy field were the highest as 9,714kg and 9,126 kg/ha per ha among corn hybrids. Among the ten hybrids, dry yield of 'Kangdaok' hybrid at drought paddy field was the highest as 5,548 kg per ha. The result of this study showed that 'Kangdaok' hybrid had good growth characters and forage productivity at drought condition and dry matter yield and TDN yield also were 21.6% and 19.3% level compared with normal paddy field.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.1
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• pp.98-102
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• 1994

This study was conducted to obtain basic informations on the starch quality improvement breeding of Job's tears. Starch, amylose, gel consistency and amylogram characteristics of seeds were investigated in 36 varieties of domestic and introduced Job's tears. Starch content was distributed between 50.9 and 78% with a mean of 60.5%. The variation observed in amylose content ranged from 0 to 7.2% with the average was 5.2%. Kangsanjong, Chujeonjong, Chungrijong showed medium gel consistency. However, many Job's tears tested showed soft gel consistency. Varietal differences of amylogram characteristics was also found at break down. In general, job's tear starch showed lower value of setback.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.40 no.2
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• pp.228-235
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• 1995

This study was conducted to obtain the basic informations for developing new varieties and cultural techniques for vegetable soybean at the Crop Experiment Station, Rural Development Administration, Suwon, Korea in 1992. Two vegetable soybean varieties, 'Hwaeom-putkong' and 'Seokryangputkong', and the other 'Jangyeobkong' for soy-paste were planted at three planting dates(April 15, May 15, June 15). The characteristics of growth, yield, and quality were compared between vegetable and soy-paste soybean genotypes in response to different planting dates.Vegetable soybean varieties, 'Hwaeomputkong' and 'Seokryangputkong' were more resistant to lodging, earlier in maturity, higher in the density of pod set on stem and percentage of poded nodes, and larger in grain size than Jangyeobkong for soy-paste. Earlier planting (April 15) of vegetable soybean varieties increased the yield of green pod as well as improved quality in number of green pods per 500g and length and width of green pod.

• Korean Journal of Plant Resources
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• v.26 no.2
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• pp.328-335
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• 2013

The National Agrobiodiversity Center is the nodal agency assigned as the National Agricultural Genebank of the Rural Development Administration. Its main role is to collect, conserve, evaluate and distribute plant genetic resources. As of 2010, NAC has distributed a total of 380,981 accessions in the last 20 years (1991-2010) or an average of about 19,000 accessions per year. To meet customers' demands for germplasm and derive quality improvements, a mail survey in 2011 was conducted among the genetic resource users in 2010. Most of the clients obtained information on the germplasm conserved in the national genebank from the NAC website or NAC staff, and they sought specific traits in the samples. Most users received the materials within 15 days, and wanted useful data together with genetic resource. Korean landrace was the most frequently requested accessions. According to the survey results, it is supposed that useful genetic resources should be preferentially collected and their characterization/evaluation should be strengthened to enhance the utilization of genetic resources.

• Journal of The Korean Society of Grassland and Forage Science
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• v.32 no.3
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• pp.209-220
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• 2012

Most oats are used for livestock feed in the world. This experiment was conducted at Iksan city of Korea from 2007 to 2008. The objective of this study was to select eminent oat (Avena sativa L.) cultivars with high-yielding and a quality for forage adaptable in each planting seasons. Experimental design was split-plot design with three replications. A split plot design was used with seeding date on the main plots and other treatments fully randomized in sub-plots. A factorial arrangement of treatments included three different ecotypes cultivars, winter type (Sanmhan, Donghan and Chohan), summer type (High-speed, Darkhorse, and Swan), and naked oats near to spring type (Daeyang, Choyang, and Sunyang) and twelve seeding dates (twice a month from March to November). Plant height, dry matter yield, and percent TDN was significantly affected by seeding dates, cultivars, and the interaction of cultivars ${\times}$ seeding dates. There was a decrease in plant height, dry matter yield, and percent total digestible nutrients (TDN) as seeding was delayed from early March to late June and it also from early September to early November. The winter type oat cultivars such as Samhan, Donghan, and Chohan adapted to fall seeding and early summer harvest, while summer type cultivars such as High-speed, Darkhorse, and Swan showed high productivity either to summer seeding and mid-fall harvest or to spring seeding and early summer harvest. Naked type cultivars, Choyang and Daeyang, showed high forage yield by spring and summer seeding except for fall seeding because of cold damage. Summer type oat cultivars such as High-speed, Darkhorse, and Swan can supplement high forage production in spring. TDN yield showd the most at seeding in October 10 (780 kg $10a^{-1}$), followed at seeding in March 23 (627 kg $10a^{-1}$).

• Journal of The Korean Society of Grassland and Forage Science
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• v.36 no.4
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• pp.280-286
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• 2016

This study was conducted to evaluate the growth characteristics and dry matter yields of Italian ryegrass (Lolium multiflorum Lam., IRG) cultivars for three years (2011~2013). The cold-resistance of domestic cultivars was stronger than other foreign varieties. Among early-maturing cultivars, dry matter (DM) yield of 'Kowinearly' was significantly higher (8,751 kg/ha) than other cultivars (p<0.05). In medium-maturing cultivars, DM yield of 'Kowinmaster' and 'Tam 90' was 9,394 and 7,461 kg/ha, respectively. Of the two, the former's DM yield was higher than the latter's (p<0.05). Among late-maturing cultivars, DM yield of 'Hwasan 104' (9,809 kg/ha) was similar to 'Hwasan 101' (9,354 kg/ha), but significantly higher than the other late-maturing cultivars (p<0.05). According to the results obtained from present study, early-maturing cultivars with cold-tolerance and high productivity is required for the paddy field cultivation of an Italian ryegrass cultivar after rice harvest in Cheonan region. Medium- and late-maturing cultivars are more advantageous for the dry field cultivation of the maximum quantity that is possible. In conclusion, to select which cultivar/s to grow, the climate of the growing area, weather conditions, and the cropping system must all be considered.

• Journal of The Korean Society of Grassland and Forage Science
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• v.30 no.2
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• pp.109-114
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• 2010

This experiment was carried out to know adaptability and forage production and quality of sorghum and sorghum ${\times}$ sudangrass and sudangrass hybrids at paddy field from 2007 to 2008 at Chonnam province. Among growth characters of six Hybrids, 'SX17' hybrid was somewhat strong for waterlogging, and higher sugar content and very good at the 2nd regrowth and disease resistance. Fresh yield of 'SX17' hybrid was the highest as 89,192kg per ha among 6 Sorghum and Sorghum ${\times}$ Sudangrass and Sudangrass hybrids. The dry matter yield of 'SX17' hybrid was also the highest as 21,038 kg per ha. The result of this study showed that 'SX17' hybrid had good growth characters and forage productivity and crude protein (CP) and in vitro dry matter digestibility (IVDMD).