Listar por tema "Agricultural Engineering"
Mostrando ítems 21-39 de 39
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Influence of greenhouse ventilation regime on the microclimate and energy partitioning of a rose canopy during summer conditions
(2001)The influence of the greenhouse ventilation regime (natural or forced ventilation) on the energy partitioning of a well-watered rose canopy (Rosa hybrida, cv. First Red) was investigated during several summer days in warm ... -
INFLUENCE OF HEATING SYSTEM ON GREENHOUSE MICROCLIMATE DISTRIBUTION
(2010)Convective and radiative heat transfer from heating systems significantly determines greenhouse microclimate during the cold period of the year. These mechanisms are complicated because they combine free and forced convection ... -
Influence of leaf area index on canopy energy partitioning and greenhouse cooling requirements
(2002)Canopy transpiration, which represents the major cooling process in greenhouses, depends strongly on the crop leaf area index I-LA. In this paper, the influence Of I-LA on canopy and greenhouse energy balance of a soilless ... -
Influence of the heating method on greenhouse microclimate and energy consumption
(2005)The influence of the heating system method on greenhouse microclimate was investigated overnight, using an experimental greenhouse tunnel with a tomato crop. The heating system consisted of plastic heating pipes located ... -
INFRARED HEATING OF GREENHOUSES REVISITED: AN EXPERIMENTAL AND MODELING STUDY
(2009)The potential advantages of night-time heating of greenhouses by modern infrared (IR) radiative sources, instead of forced hot air, are examined experimentally and theoretically. Measurements of indoor and outdoor conditions ... -
Isolation of soil bacteria able to hydrolyze both organophosphate and carbamate pesticides
(2011)Two bacteria identified as Pseudomonas putida and Acinetobacter rhizosphaerae able to rapidly degrade the organophosphate (OP) fenamiphos (FEN) were isolated. Denaturating gradient gel electrophoresis analysis revealed ... -
Maximizing oilseed rape's yield by glyphosate under Mediterranean conditions
(2011)Adverse hot and dry environmental conditions prevailing during the period of oilseed rape ripening can be blamed for considerable yield losses during the crop's mechanized harvesting in the Mediterranean area. In this ... -
Natural ventilation of a greenhouse with ridge and side openings: Sensitivity to temperature and wind effects
(1997)An air exchange rate model of a Mediterranean greenhouse with ridge and side openings combining temperature and wind effects as driving forces of the natural ventilation was developed and tested on experimental data. it ... -
Natural ventilation performance of six greenhouse and tunnel types
(1997)The physical basis of natural ventilation is reviewed and the ventilation performance examined of six different greenhouse and tunnel types equipped with either roof or side, or both roof and side vents. Altogether, sixteen ... -
Performance of cotton residue collection machinery
(2014)Cotton is an important crop in Greece, covering more than 255,000 ha every year. Apart from the lint and seed, cotton produces large amounts of residues that can be used for energy production. The aim of this work was to ... -
Potential growth and biomass productivity of Miscanthus x giganteus as affected by plant density and N-fertilization in central Greece
(2007)The potential growth and biomass productivity of Miscanthus x giganteus was investigated under constraint-free conditions during two years with appreciable different climatic conditions in central Greece, and under three ... -
Pressure field and airflow at the opening of a naturally ventilated greenhouse
(1998)Direct estimation of airflow at the vent opening by means of differential pressure measurements were performed in a twin-span greenhouse equipped with a continuous vent at the gutter. Application of Bernoulli's equation ... -
Reliability of cotton pickers and its effect on harvesting cost
(2002)In this study, the reliability of cotton pickers is analysed and its importance in studying the performance of harvesting systems is examined. A theoretical development of farm machinery and specifically of cotton-picker ... -
SHADING EFFECTS ON GREENHOUSE MICROCLIMATE AND CROP TRANSPIRATION IN A CUCUMBER CROP GROWN UNDER MEDITERRANEAN CONDITIONS
(2012)The aim of this study was to investigate the effects of greenhouse shading on greenhouse microclimate and energy balance, and on crop production. Experiments were carried out in the experimental farm of the University of ... -
Soil tillage, irrigation and fertilization effects in cotton crops
(2002)A three-year experiment comparing five tillage methods with chemical and green manure fertilizer and two levels of water application of cotton (Gossypium hirsutum. L) are reported in this article. Results showed that ... -
Switchgrass (Panicum virgatum L.) nutrients use efficiency and uptake characteristics, and biomass yield for solid biofuel production under Mediterranean conditions
(2014)Switchgrass produces high amounts of biomass that can be used for solid biofuel production. In this study, the dry biomass yield vs. N-P-K nutrient uptake relations as well as the N-mineralization and the N-fertilization ... -
Temperature gradients in a partially shaded large greenhouse equipped with evaporative cooling pads
(2003)The main drawback of greenhouse evaporative cooling systems based on cooling pads and extracting fans is the thermal gradient developed along the direction of the airflow. High-temperature gradients of this type can markedly ... -
Transplanting Machine Operation Analysis
(2011)Transplanting has been used for most vegetables and ornamental plants to achieve better establishment and early maturing of the crops. Manual transplanting is slow and labour intensive. Semiautomatic transplanters are a ... -
Wind induced air exchange rates in a greenhouse tunnel with continuous side openings
(1996)To study the influence of wind speed on ventilation rates, experimental trials were carried out in a plastic tunnel with continuous side ventilators. This type of greenhouse is the most representative of Mediterranean and ...