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Αποτελέσματα 21-30 από 62
Calcium, magnesium and potassium concentrations prediction in a recirculated nutrient solution of a greenhouse soilless rose crop
(2006)
The effects of i) biophysical processes such as crop water uptake, and elements absorption and ii) chemical processes such as fertilizers dissolution and pH changes, on Ca2+, Mg2+ and K+ concentration in a recirculated ...
Measurements and modelling of tracer gas distribution in a naturally ventilated greenhouse for pesticide dispersion determination
(2006)
In this study numerical and experimental results concerning the dispersion of a tracer gas (N2O) inside an experimental greenhouse with a tomato crop were presented and analyzed. The proposed simulation concerns a greenhouse ...
Use of a decision support system for management of the drainage solution in semi-closed hydroponic systems under different drainage fractions
(2014)
Soilless cultivation, especially in closed-loop hydroponic systems offers a great option for water saving in greenhouses. Capture and recycling of the excess irrigation water that drains out of the root zone is possible ...
Performance test of a Na+ accumulation model as part of a decision support system for closed hydroponic systems management
(2012)
The recycling of greenhouse effluents in soilless cultivation systems is environment-friendly, since the waste of water and the disposal of nutrients to the environment is drastically reduced or even eliminated. However, ...
Evaluation of crop reflectance indices for greenhouse irrigation scheduling
(2012)
Development of direct, non-contact, non-destructive methods for irrigation control purposes is of great interest. The present work deals with the evaluation of reflectance indices for irrigation control in greenhouse ...
Case studies of a modified biological simulator (TOMGRO) according to short cropping period
(2012)
The aim of this work was to perform a sensitivity analysis of a modified biological simulator (TOMGRO) in tomato crop during winter period. The modified biological simulator (TOMGRO) that used for case studies of the ...
Relationships between Reflectance and Water Status in a Greenhouse Rocket (Eruca sativa Mill.) Cultivation
(2013)
Crop water status is an important parameter for plant growth and yield performance in greenhouses, and thus early detection of water stress is essential for efficient crop management. Therefore, the aim of this work was ...
Test of a greenhouse covered by polyethylene film that reflects near-infrared radiation
(2012)
The aim of this work was to study the effects of a new polyethylene (PE) 'silver' film [with high reflection and absorption in the Near Infrared Radiation (NIR)] on greenhouse microclimate and on growth and production of ...
Development and evaluation of a DSS for drainage management in semi-closed hydroponic systems
(2014)
The recycling of greenhouse effluents in soilless cultivation systems is environment-friendly, since the waste of water and the disposal of nutrients to the environment is drastically reduced or even eliminated. However, ...
Data based modeling approach for greenhouse air temperature and relative humidity
(2012)
Greenhouse air temperature and relative humidity are two important variables that can be influenced and controlled by many parameters. The present research refers to the prediction of these two variables in a greenhouse ...