• Proceedings of the Korean Society of Crop Science Conference
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• 1986.06a
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• pp.34-35
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• 1986

• Proceedings of the Korean Society of Crop Science Conference
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• 1977.05a
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• pp.27.2-28
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• 1977

• Proceedings of the Korean Society of Crop Science Conference
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• 1992.05a
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• pp.104-105
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• 1992

• KOREAN JOURNAL OF CROP SCIENCE
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• v.64 no.3
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• pp.193-203
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• 2019

The aim of this study was to analyze the relationship between rice yield and climate elements in Daegu (southern plain area) and Andong (inland mountainous area) regions. Over the past 20 years, rice yield has increased in both regions. The rice yield of middle and mid-late maturing cultivars in the recent 5 years increased by about 10% and 18%, respectively, compared to that produced in the early 2000s in the Daegu region. In the Andong region, the rice yield of mid-late maturing rice cultivars in the recent 5 years was higher by about 7% than that of the early 2000s. The number of panicles per hill and grain ripening rate significantly affected rice yield in mid-late maturing cultivars. In addition, the grain weight and grain ripening rate significantly affected rice production in middle maturing cultivars grown in the Daegu region. With regard to the middle maturing cultivars, the relationship between grain weight and rice yield had a positive significant correlation in both regions. To understand the effect of climate factors on rice yield, the milled rice yield of several rice cultivars produced over the past 20 years (1999-2018) at both locations, Daegu and Andong, were evaluated. The rice yields increased owing to long sunshine duration during the grain filling stage in the Daegu region. In Andong, rising maximum temperature during the vegetative stage increased rice yield of early and mid-late maturing cultivars. Long sunshine hours increased yield of mid-late maturing cultivars in both regions.

• 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 CROP SCIENCE
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• v.37 no.3
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• pp.237-243
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• 1992

To determine effects of simulated acid rain on the growth and yield of rice, soybean and sesame, and on the soil acidity, two cultivars of rice, soybean and sesame were exposed twice a week to one of four simulated rain acidities[pH 2. 6, 3. 6, 4. 6 and 5. 6(control)]. The plants were protected from ambient rain by a polyethylene film cover. No visible damage due to the simulated acid rain was observed at any stage of growth for either of the crops. In rice, heading date, plant height and yield components except ripening ratio were not significantly affected by the pH ofsimulated rain, but the ripening ratio and rough rice yield linearly decreased as the pH of simulated rain was decreased. In soybean, maturing date and yield components except 100 seed weight were not significantly influenced by the pH of simulated rain, but the 100 seed weight and yield linearly decreased as the pH of simulated rain was decreased. Seed yield and the other agronomic characteristics of sesame were not significantly affected by the pH of simulated rain. Soil pH after cropping rice, soybean and sesame decreased as pH of simulated rain was decreased.

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.04a
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• pp.54-54
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• 2022

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.04a
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• pp.28-28
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• 2022

• KOREAN JOURNAL OF CROP SCIENCE
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• v.25 no.2
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• pp.76-81
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• 1980

Root yield, number of missing and diseased plant in each line were investigated in various ginseng farms. Root yield per unit area was negatively correlated to missing percentage. Missing percentage showed significant positive correlation with diseased rate. Among lines yield was significantly different in most fields while missing rate was not, indicating that yield of each line is affected by present shading method but disease occurrence is not. Thus there are two ways of yield increase, shading improvement and disease control.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1994.05a
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• pp.121-122
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• 1994

배양액농도는 작물의 양분과 수분흡수에 영향을 주고 생육, 수량 및 품질에 미치는 영향이 큰 근권제어요인이다. 순수수경재배에서는 작물종류별 배양액농도에 대한 연구가 많이 되어 있으나 배지경에서 배지종류별 작물에 따른 적정배양액 농도에 대한 연구는 드물다. 특히 적정배양액 농도는 작물종류, 품종, 생육단계에 따라 다르고, 생산물의 품질에도 지대한 영향을 미치는 것으로 밝혀지고 있다. 따라서 토마토에서 배지종류별(펄라이트, 버미큘라이트, 피트모스) 육모기와 정식후 배양액농도에 따른 토마토 수량 및 품질에 미치는 영향을 밝히고져 실험을 수행하였다. (중략)