• Journal of Biosystems Engineering
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• v.24 no.6
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• pp.539-546
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• 1999

Some stress for a plant could be detected to a certain degree by plant physiological measuring technique of the state of the art. The capability of early detection of my measuring system depends on kind of plant and kind and level of stress. The objectives of this study were to evaluate the capability of several fast and intact type plant stress detection systems to detect nitrogen deficiency of cucumber in the field. A series of experiment was carried out with four kinds of intact type measuring devices - a chlorophyll content meter, a chlorophyll fluorescence measurement system, an infrared thermometer and an optical spectrometer. The experiments resulted that the chlorophyll content meter could detect the stress of N deficiency at a confidence level higher than 95% on 3rd day for the earliest case and the detection of high precision was possible from 7th day after the stress was applied. The chlorophyll fluorescence measurement system detected the stress at a confidence level higher than 95% on 3rd day for the earliest case but the detection was not as much precise as the chlorophyll content meter. Leaf temperature measurement noted very poor results to detect the stress. Using the spectrometer, sensitive wavelength regions to detect the stress were searched and found out as 562∼564 nm, 700∼724 nm and 1,886∼1,894 nm. With the spectrometer using any of wavelength within the sensitive wavelength region, detection of the stress at a confidence level higher than 95% was possible from 3rd or 4th day after the stress was applied.

• Plant Disease and Agriculture
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• v.2 no.1
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• pp.50-60
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• 1996

최근에 농업기술의 발달로 작물의 재배환경과 재배기술 또한 날로 개선되어 가고 있으나 농촌 인력의 부족과 재배자의 고령화로 인한 토양 비배 관리의 소홀, 화학 비료의 과다 및 편중 사용, 토양 산도 변화에 따른 작물의 영양 흡수 불균형으로 인한 생리적 장해의 발생과 하우스 재배면적의 증가로 인한 연작장해의 발생이 심각한 문제로 대두되고 있다. 본 강좌에서는 지난 호의$\mathbb{\ulcorner}$영양생리 장해의 발생현황과 발생조건$\mathbb{\lrcorner}$에 이어 작물재배시에 발생하는 각종$\mathbb{\ulcorner}$영양생리 장해의 진단$\mathbb{\lrcorner}$방법을 소개한다.

• Journal of Bio-Environment Control
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• v.12 no.1
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• pp.30-37
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• 2003

An expert system was developed for the stress diagnosis of cucumber and tomato using FoxPro. The principle points in building the system were integration with Korean, effective processing of mass information, and easy access for non-experts such as farmers. The method of inferencing was forward chaining based on pattern matching. Knowledge base was expressed with IF∼THEN rules and was expressed in the form of tree. Also, the expert system was designed so that additions and modifications of all information could easily be performed on windows. The results tested by farmers with the developed system showed that the expert system was reliable for the practical use. It was expected the expert system could be directly applied to the stress diagnosis of other vegetable plants by modifying only data bases.

• Plant Disease and Agriculture
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• v.2 no.2
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• pp.23-29
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• 1996

최근에 농업기술의 발달로 작물의 재배환경과 재배기술 또한 날로 개선되어 가고 있으나 농촌인력의 부족과 재배자의 고령화로 인한 토양 비배 관리의 소홀, 화학 비료의 과다 및 편중 사용, 토양산도 변화에 따른 작물의 영양 흡수 불균형으로 인한 각종 생리적 장해의 발생과 하우스 재배면적의 증가로 인한 연작장해의 발생이 심각한 문제로 대두되고 있다. 본 강좌에서는 $\mathbb{\ulcorner}$영양생리 장해의 발생현황과 발생조건$\mathbb{\lrcorner}$과 $\mathbb{\ulcorner}$영양생리 장해의 진단$\mathbb{\lrcorner}$에 이어 작물 재배시에 발생하는 각종 $\mathbb{\ulcorner}$영양생리 장해의 대책$\mathbb{\lrcorner}$을 소개한다.

• Journal of Biosystems Engineering
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• v.25 no.6
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• pp.517-526
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• 2000

A series of experiments was conducted to evaluate the capability of detecting nutrimental deficient stress of N, P and Ca of a tomato plant using several fast and intact type physiological properties measuring devices - a chlorophyll content meter an infra-red thermometer to measure leaf temperature a chlorophyll fluorescence meter a porometer an optical spectrometer a multi-scan radiometer and a canopy analyzer. to detect N deficient stress a chlorophyll content meter a spectrometer and a multi-scan radiometer were useful and their possibility to detect was estimated as about 50%, 100% and 100% respectively. To detect P deficient stress the infra-red thermometer the porometer and the spectrometer proved their usefulness an their possibility to detect was estimated as about 70%, 70% and 70% respectively. To detect Ca deficient stress an thermometer a porometer a spectrometer and a multi-scan radiometer were useful and their possibility to detect was estimated as about 60%, 70%,80% and 100% respectively. The experiments resulted that use of a spectrometer and a multi-scan radiometer in combination with a chlorophyll content meter an infra-red thermometer and a porometer were desirable to distinguish the nutrimental stress tested in the study.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1999.07a
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• pp.171-176
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• 1999

작물의 생육장해 진단은 식물체의 계측에 의해 수행되는데, 이러한 계측은 생육 중인 작물을 대상으로 할 경우, 작물의 잎이나 줄기의 비파괴적 생체(in-vivo)계측을 필요로 하며 비접촉이면 더욱 바람직하다. 그리고 식물체의 건강상태를 좀더 신속하고 정확히 파악하기 위해서는 가능한 다양한 항목을 측정 대상으로 하여 관찰하는 것이 요구될 뿐만 아니라 많은 경우 그 관찰은 미소한 생장반응 및 생장량을 측정하여야 하므로 상당히 높은 정확도의 전문 센서가 필요하다. (중략)

• The Korean Chronic Disease News
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• no.6
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• pp.6-6
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• 1980

• Agrochemical news magazine
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• v.17 no.5 s.134
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• pp.26-29
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• 1996

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2003.02a
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• pp.412-417
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• 2003

작물의 생장상태를 측정하고자 기존의 연구자들에 의해서 많은 연구가 수행되고 있다. 그러나 작물의 생장을 감시하기 위한 기존의 방법은 파괴적이며 지속적이지 못하다는 단점을 지니고 있다. 작물이 생장 장해를 받아 눈에 띄게 작물의 생장변화가 보일 경우 작물은 이미 영구적인 손상을 받게 진다. 따라서 이런 작물의 생장 장해를 조기에 진단하여 작물의 생장 장해에 능동적으로 반응할 수 있는 방법의 개발이 절실히 요구된다. (중략)

• 월간산업보건
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• s.219
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• pp.33-33
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• 2006