Barley Yellow Mosaic Virus (BaYMV) caused significant reduction in barley yield and is difficult to control due to alive parasitic soil-borne fungus, Palmyra gamines that transmits the, virus. Previous studies have indicated that a virus-free soil could be infested by using virus-contaminated farming machineneries and implements. For the further confirmation of this finding, different proportions of BaYMV-infested soil were mixed into virus free soil. Three barley varieties (Hordum vulgarae, cv "Olbori", "Baegdong" and "Sacheon 6") were sown in pots treated with different rate of P. graminis-infested soil ranging from 0% to 100% in October 20, 2001. Results showed that BaYMV infection increased as the rate of infested soil increased. Initial symptoms were observed in a pots treated with 10% infested soil in all the 3 varieties of barley. "Olbori" had about 5% infection in 20% infested soil and about 10% infection in 40% or 50% infested soil and about 20% infection in 60% infested soil. In "Baegdong", the trend of BYMV occurrence was similar with "Olbori" but the time of severe infection was earlier than "Olbori". BaYMV infection in "Sacheon 6" was even earlier than "Baegdong" with much more severe symptoms than "Baegdong". The growth rate of barley was affected by about 19-22% when grown in 20% infested soil. As the rate of BaYMV infested soil increased the heading date was delayed but the maturing date was early in "Olbori" and "Sacheon 6". Also, reduction rate of culm length in 3 varieties increased with increase of infested soil content. However, "Olbori" showed the highest reduction. "Sacheon 6", have been characterized with long spike length, however was significantly reduced as the infested soil increased. On the other hand, spike length of "Olbori" was not significantly affected despite of increased of infested soil. The reduction rate of 1000 kernel weight was higher in large kernel size cultivar "Sacheon 6" and "Olbori" than small kernel size "Baegdong" as increase of BaYMV-infested soil content.

아마 파종기에 따른 주요형질 및 수량변화를 구명코자 Wiera, Taijungsun ＃1, Storment Goss, CI 1763, 99403-Fiber의 5품종을 공시하여 파종기는 3월 10일, 25일, 4월 5일의 3기로 구분하여 시험한 결과를 요약하면 다음과 같다. 1. 성숙기는 파종기가 지연됨에 따라 늦어지는 경향이 있다. 2. 경장은 3월 10일 파종에서 Wiera는 83cm로 가장 길었고 Taijungsun ＃1은 64cm로 가장 짧았으며 3월 25일, 4월 5일로 파종이 늦어짐에 따라 모든 품종이 참아지는 경향이었으며 섬유비율은 3월 10일 파종에서 Wiera 가 15.6%로 가장 높았는데 파종기는 늦어짐에 따라 모든 품종들이 감소되었다. 세도는 Taijungsun ＃1가 26.2本으로 가장 가늘었으며 99403-Fiber는 19.5본으로 가장 굵었으며 파종기가 늦어질수록 세도가 낮아져서 줄기가 굵어지는 경향이었다. 3. 유분함량은 3월 10일 파종에서 Taijungsun ＃1는 34%, Storment Goss는 32%, Wiera는 30%, CI 1763은 27%. 99403-Fiber는 26%로 높았으나 가장 늦은 파종에서는 24%까지 낮아졌다. 4. 원경수량은 모든 파종기에서 Wiera가 가장 다수성이었으며 파종기간에서는 3월 10일에서 4월 5일로 늦어짐에 따라 원경중 감소폭이 가장 Wiera가 커서 파종기 차이에 따른 원경중의 반응이 민감한 품종임을 알 수 있었다. 5. 종실수량은 Taijungsun ＃1가 가장 않았고 전품종이 파종이 지연됨에 따라 감소하는 경향이었다. 6. 파종기에 따른 5품종의 유용형질들의 분산분석에서 파종기, 품종 모두 유의성이 고도로 높았고 파종기와 품종간의 상호작용에서도 모든 형질에서 고도의 유의차가 인정되었으나 다만 유분함량의 형질에서만 유의성이 없었다.ucation School health education was planned every semester in 55.7％, which was the highest. As for utilization status of the materials for planning of a school health education as a referance, 86.8％ of the total respondants utilized the guidelines published by Seoul city School nurses′ Association, and the administrative guidelines for school health, textbooks, school health statistics and articles related to school health in order. It was tried whether the number of referances being utilized was related to the working experiences. It was found that the shorter the experiances, the more materials were utilized. It was answered that teaching plan for health education was prepared by school-nurses themselves (95.2％), and was differentiated as three levels as the first and second grades, the third and fourth grades, and the fifth and sixth grades 3. The contents of the school health education 16 subjects offere