To identify salt-tolerance characteristics of corn seedling was treated in solution of 0, 50 and 100 mM NaCl of hydroponic cultivation. In photosynthesis of corn seedling, there was no large difference between 50mM and 0 mM NaCl solution, however, in 100 mM NaCl solution, the tolerance gradually decreased to 76~%,~;49~%,~;and~;31~% after one day, four days, and seven days, respectively, in comparison to 0 mM NaCl solution. Osmotic potential of corn in seedling period was significantly decreased with increasing saline level, however, free proline content in the plant on the ground was significantly increased with increasing saline level and with the lapse of time. In terms of correlation among major characteristics, there was a highly significant positive difference between osmotic pressure potential and photosynthesis, However, highly negative correlation was found between osmotic pressure potential and free proline content. In addition, it was expected that young seedling of corn with saline tolerance may be utilized in the transplantation in salt-accumulated land. Based on above-shown result, in terms of saline tolerance of Chalok-2 variety, growth suppression was serious with 100mM NaCl solution. However, growth was expected that seedling growth would be favorable under 50 mM NaCl solution.

This study was conducted to classify photosynthesis rate and changes of rutin content of Korean buckwheat (cv. Chunchon-jaerae and Yangjeul-memil) treated with salinity, UV-C and low temperature. In case of cv. Chunchon-jaerae and Yangjeul-memil, according to the salt stress, transpiration rate, stomatal conductance and photosynthesis rate were decreased. Both cultivars also showed decrease of transpiration rate and photosynthesis rate under the UV-C. Rutin contents within leaf and stem of cv. Yangjeul-memil were decreased when NaCl concentration was high. Rutin contents within leaf and stem of cv. Yangjeul-memil were generally decreased when the time laps under the UV-C stress. Rutin contents within leaf and stem of cv. Chunchon-jaerae was also generally decreased when the time laps under the low temperature stress.

Danok3, a sweet corn hybrid that matures early was developed by the corn breeding team at the National Crop Experiment Station (NCES), RDA in 2001. Inbred KSS2 derived from Golden Bantam was used as the seed parent of Danok3, and inbred KSS22 derived from

“Dongjinchalbyeo” is a new japonica glutinous rice cultivar developed from a cross between Milyang95 and SR11155-4-2/Toyonishiki by the rice breeding team of the National Honam Agricultural Experiment Station (NHAES), RDA, in 1998. This cultivar has a sho

A single cross hybrid, 'Heugjeomchal', is a white and black bicolor waxy corn (Zea mays L.) developed by the Maize Experiment Station (MES), Gangwondo Agricultural Research and Extension Services (GARES) in Hongcheon in 2000. 'Heugjeomchal' was made by cr

As potential of oil spill accident in Busan area is growing with an increase of trade and marine traffic, it become important to provide a realistic and practical response plan to address spilled oil effectively. The authors make a most probable scenario of spill accident to investigate an seasonal applicable response techniques. As a result, it is found that mechanical recovery and/or shoreline clean-up operation are required at the eastern shore of Taejongdae in spring and autumn. In summer, since spilled oil moves and contaminates a lot of sensitive areas in Suyeong Bay, a prompt action is required to mechanically contain and recover as much oil at sea surface as possible, at the same time shoreline counter-measures are commenced. In winter with off-shore wind, no action will be required because there is no risk of oil migration to shore. In addition to mechanical recovery and shoreline clean-up, the use of concentrate dispersant can be an primary option especially in spring and autumn as there is less possibilities to contaminate sensitive areas and sufficient deep waters. However, special care is taken to select response options according to the weather condition at the time of spill.

Swordbean was recently introduced to Korea, and cultural technique for stable production, e.g. optimum seeding date and planting space, has not been established. This experiment was conducted to elucidate the changes of growth characteristics, yield components, and yield as affected by different seeding dates and planting spaces. Days to flowering was shortened by 4∼28 days as seeding was delayed. Stem diameter, number of pods per plant, number of seeds per plant, 100-seed weight, and seed yield tended to increase with delaying seeding up to 5 April and then to decrease with further delaying seeding. These results indicate that optimum seeding date of swordbean in unheated polyvinyl house would be early April. Although, the swordbean exhibited large increases in plant height, number of branches per plant, and stem diameter at the wider spacings, planting space could be decreased to the 60 cm plant-spacing and 30 cm row-spacing with no deleterious effect on yield.