• Title/Summary/Keyword: crop growth experiment

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Identification of Crop Growth Stage by Image Processing for Greenhouse Automation (영상정보를 이용한 자동화 온실에서의 작물 성장 상태 파악에 관한 연구)

  • 김기영;류관희;전성필
    • Journal of Biosystems Engineering
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    • v.24 no.1
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    • pp.25-30
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    • 1999

  • The effectiveness of many greenhouse environment control methodologies depends on the growth information of crops. Acquisition of the growth information of crops requires a non-invasive and continuous monitoring method. Crop growth monitoring system using digital imaging technique was developed to conduct non-destructive and intact plant growth analyses. The monitoring system automatically measures crop growth information sends an appropriate control signal to the nutrient solution supplying system. To develop the monitoring system, a linear model that explains the relationship between the fresh weight and the top projected leaf area of a lettuce plant was developed from an experiment. The monitoring system was evaluated buy successive lettuce growing experiments. Results of the experiments showed that the developed system could estimate the fresh weight of lettuce from a lettuce image by using the linear model and generate an EC control signal according to the lettuce growth stage.

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Germination and Seedling Growth Characteristics of Seeds with Different Bolting Years in Angelica gjgas NAKAI. (참당귀(當歸) 꽃대발생(發生) 년차(年次)에 따른 종자(種子)의 발아(發芽) 및 묘생육(苗生育) 특성(特性))

  • Yu, Hong-Seob;Lee, Seung-Tack;Chang, Yeong-Hee;Kim, Kwan-Su;Kim, Young-Guk
    • Korean Journal of Medicinal Crop Science
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    • v.4 no.3
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    • pp.193-198
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    • 1996

  • To establish appropriate seed production system in Angelica gigas. Germination of seeds with different bolting years and the growth characters of plants originated from these seeds were in­vestigated. Seed weight from 1st year bolting plant was highest. In germinability according to seeds with different bolting years, seeds from 1st year bolting plant were higher than seeds from 2nd, 3rd years bolt­ing one. In growth characters of plants originated from seeds with different bolting years, as the bolting years became late, root growth increased and top growth decreased, therefore T/R ratio decreased.

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Evapotranspiration and Grain Yield in Responses to Different Soil Water Conditions in Soybean

  • Yang, Jae-Hwang;Kim, Wook-Han;Seong, Rak-Chun;Hong, Byung-Hee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.45 no.4
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    • pp.241-244
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    • 2000

  • This experiment was conducted to evaluate the effect on evapotranspiration and yield of soybean according to different soil water conditions, and to find the optimum time and amount for irrigation in soybean cultivation. The difference between potential evapotranspiration (PET) and maximum evapotranspiration (MET) during growing season of soybean planted in lysimeter was higher during reproductive stage than during vegetative one. The maximum crop coefficient was obtained at beginning seed stage of soybean. Soil water coefficient of irrigation treatment was higher than that of non-irrigation treatment during soybean growth stage in field experiment. Grain yield was highest in lysimeter due to its high water use efficiency and evapotranspiration rate.

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