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Wyszukujesz frazę "greenhouses" wg kryterium: Wszystkie pola


Tytuł:
Evaluation of cost efficiency in tomato greenhouses: the case of seven agrobussines in México, 2016
Autorzy:
Arvizu Armenta, Marisol
Powiązania:
https://bibliotekanauki.pl/articles/14468728.pdf
Data publikacji:
2018-09-27
Wydawca:
Wyższa Szkoła Bankowa we Wrocławiu
Tematy:
Stochastic Frontier Model
Efficiency in Costs
tomato´s Greenhouses
Opis:
Aim: The main objective of this research was to evaluate the efficiency of economic costs in seven units of greenhouse tomato production, during the production cycles of 2016, through the application of the stochastic frontier, depending on the type of packaging they handle and the cost structure that governs them.   Design / Research methods: The stochastic frontier model includes the analysis of the non-systematic random component, which assumes an extremely critical role in the analysis during the interpretations. With the calculation of the stochastic cost frontier we construct the cost inefficiency index represented by C_it, delimited below 0. The index shows the percentage in which the cost is exceeded and, therefore, the degree of inefficiency.   Conclusions / findings: The elaboration of the stochastic frontier finds its justification in the argument that the less efficient competitor is the one that receives the greater effects of the competition. In this sense, the location of the companies analyzed with respect to their own line of efficiency is essential for the design of the strategies of each company. The production units analyzed showed that, on some occasions, externalities are the cause of inefficiency, but contrary to what is established in theory, there are some units that show that the inefficiency with which they count is diminished by The influence of uncontrolled variables.  Originality / value of the article: The contribution of this research lies in the use of efficiency models in the primary sector, specifically in tomato´s greenhouses.
Źródło:
Central European Review of Economics and Management; 2018, 2, 3; 101-124
2543-9472
Pojawia się w:
Central European Review of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First Notice of Phytophthora Crown and Root Rot of Euphorbia Pulcherrima in Polish Greenhouses
Autorzy:
Orlikowski, L.B.
Ptaszek, M.
Powiązania:
https://bibliotekanauki.pl/articles/65194.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The plant pathogen, Phytophthora cryptogea, was recovered from 4/5 of the 75 poinsettias collected from two greenhouse farms. The poinsettias showed stunting and wilting as well as stem base and root rot symptoms. Representative isolates of the species from two poinsettia cultivars, colonized stem parts, leaf petioles, leaf blades and root parts. Stem parts of 6 cultivars were colonized at a slower rate than other poinsettia organs. Isolate from Euphorbia pulcherrima also colonized stem parts and leaf blades of E. amygdaloides, E. cyparissias, and E. polychroma. Isolates of P. cryptogea from the other 6 plant hosts, colonized the overground parts of poinsettia cv. Allegro. This is the first report describing symptoms and colonization of poinsettia cultivars by P. cryptogea in Poland.
Źródło:
Journal of Plant Protection Research; 2013, 53, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of heat requirements in greenhouses for Kirşehir and Kahramanmaraş provinces
Autorzy:
Boyaci, Sedat
Akyüz, Adil
Tanriverdi, Çağatay
Powiązania:
https://bibliotekanauki.pl/articles/2131639.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
greenhouse
heat requirement
thermal screen
energy saving
Opis:
Greenhouses are artificial growing environments that can provide the growth factors required for the production of crop plants out of season. In these structures, the low temperature values that occur during the year cause losses in yield and quality because they are not suitable for plant cultivation. In order to be able to grow out of season in these periods, the amount of heat required by the plants should be provided with additional heating. In the study carried out to determine the amount of heat needed in greenhouses throughout the year for the provinces of Kırşehir and Kahramanmaraş, which are located in two different regions of Turkey, the heat requirements that will arise in the presence or absence of a thermal screen in greenhouses with the same characteristics were calculated. In the calculations, the most common tomato plant grown in both provinces has been considered. Accordingly, if the greenhouse temperature is kept at a constant temperature of 18°C throughout the year, the heat energy requirements that emerge during the year are 469.90 kWh m.-2 for Kırşehir and 254.71 kWh m.-2 for Kahramanmaraş. In the case of using a thermal screen, these values were calculated as 401.53 kWh m.-2 for Kırşehir province and 218.91 kWh m.-2 for Kahramanmaraş province. As a result of the study, the amount of heat energy needed in greenhouses in provinces decreased with the use of thermal screens. It has been determined that this situation is extremely important in terms of reducing the share of heating in production costs and the amount of carbon dioxide released into the atmosphere by fossil energy sources used for heating purposes.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2022, nr I/1; 5-20
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of airflow over two successive tunnel greenhouses
Autorzy:
Dados, J.N.
Fragos, V.P.
Ntinas, G.K.
Papoutsi-Psychoudaki, S.
Nikita-Martzopoulou, C.
Powiązania:
https://bibliotekanauki.pl/articles/26642.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2011, 25, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of suitableprotected production areas: Lower Euphrates basin case
Autorzy:
Saltuk, B.
Mikail, N.
Atilgan, A.
Tanriverdi, C.
Powiązania:
https://bibliotekanauki.pl/articles/101400.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
climatization
greenhouses
heat load
Lower Euphrates basin
Opis:
As a result of the increase in the world population and the decrease in agricultural land, the need for food increases every day. Nowadays, breeding studies are carried out to increase the yield of plants to get more products from the same area. Furthermore, controlled production areas are created by optimizing climatic conditions and the continuity of production is ensured. It is called greenhouse, where production can be carried out throughout the year and the indoor temperature and humidity conditions can be controlled. Nowadays, greenhouses are now functioning as an industrial enterprise. However, greenhouses need to comply with the principles of quality production, efficient income growth and physical environmental protection. Almost all of the plant production in greenhouses in Turkey is done in the Mediterranean region, but in the Southeastern Anatolia Region, it is done in a very limited greenhouse area. The increase of protected agricultural areas in the Mediterranean region and the fact that the production volume cannot reach a certain limit makes it necessary to investigate alternative protected production areas. In this study, climate conditions of Antalya province and climate data of four provinces of the Lower Euphrates basin are compared with each other and statistically compared. As a result of, differences have been found between Antalya province and the provinces in the Lower Euphrates basin in terms of minimum, maximum, and average temperatures. However, there is no difference between the provinces in the basin except for Gaziantep in terms of climatic conditions. Therefore, it has been determined that Gaziantep province is not suitable for greenhouse cultivation. However, it has been concluded that if greenhouse cultivation is performed in this province, it is appropriate to perform cultivation in the areas where alternative energy sources can be used. It has been concluded that in the case that heating costs are reduced using alternative energy sources, Şanlıurfa and Kilis provinces are climatologically suitable for greenhouse cultivation and Adıyaman province is partially suitable for it.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, II/2; 701-714
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Issledovanie ehksperimentalnojj teplicy dlja priusadebnogo khozjajjstva
Experimental research greenhouses for subsistence farming
Autorzy:
Opryshko, A.
Pasychnyk, N.
Powiązania:
https://bibliotekanauki.pl/articles/77252.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
energy efficiency
greenhouse
polycarbonate coating
heat accumulation
subsistence farm
experimental research
Opis:
Представлена конструкция экспериментальной теплицы для приусадебного хозяйства, малого и среднего бизнеса, для получения до 2-х урожаев в год без дополнительного обогрева. Конструкция осноана на применении покрытий из поликарбоната и аккумуляторов тепла. Проведена экспериментальная оценка полученных результатов.
The design of experimental greenhouses for subsistence farming, small and medium business, for up to 2 harvests per year without additional heating. The design is based on the application of coatings of polycarbonate and heat accumulators. The experimental evaluation of the results.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 3
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ograniczenie zużycia ciepła w szklarniach
Limitation of heat consumption in greenhouses
Autorzy:
Rutkowski, K.
Wojciech, J.
Powiązania:
https://bibliotekanauki.pl/articles/287967.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
szklarnia
ciepło
jednostkowe zużycie ciepła
ekran termoizolacyjny
greenhouse
heat
unit heat consumption
thermo-insulating screens
Opis:
Objęty analizą obiekt stanowi punkt odniesienia oceny energetycznej dla szklarni nowej generacji będących przedmiotem kolejnych publikacji. W pracy przedstawiono analizę zużycia ciepła w szklarniach o wysokości 2,4 m wyposażonych w ekrany w postaci folii pojedynczej podwieszonej na wysokości okapu oraz folii komórkowej umieszczonej na zewnątrz ścian bocznych szklarni. Badania przeprowadzono przy różnych warunkach wietrznych. W pracy określono jednostkowe zużycie ciepła w odniesieniu do powierzchni uprawy oraz powierzchni osłony szklarni.
The object covered by the analysis constitutes a reference point of energy evaluation for new generation greenhouses being the subject of successive publications. The paper presents heat consumption analysis for 2.4m-high greenhouses provided with screens in form of single foil suspended at eaves height and cellular foil placed outside greenhouse side walls. The tests were performed for different wind conditions. The paper specifies unit heat consumption with reference to cultivation area and total greenhouse cover area.
Źródło:
Inżynieria Rolnicza; 2009, R. 13, nr 9, 9; 219-225
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Information technology for comprehensive monitoring and control of the microclimate in industrial greenhouses based on fuzzy logic
Autorzy:
Laktionov, Ivan
Vovna, Oleksandr
Kabanets, Maryna
Powiązania:
https://bibliotekanauki.pl/articles/2201317.pdf
Data publikacji:
2023
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
monitoring
control
information technology
greenhouse
fuzzy logic
Opis:
Nowadays, applied computer-oriented and information digitalization technologies are developing very dynamically and are widely used in various industries. One of the highest priority sectors of the economy of Ukraine and other countries around the world, the needs of which require intensive implementation of high-performance information technologies, is agriculture. The purpose of the article is to synthesise scientific and practical provisions to improve the information technology of the comprehensive monitoring and control of microclimate in industrial greenhouses. The object of research is nonstationary processes of aggregation and transformation of measurement data on soil and climatic conditions of the greenhouse microclimate. The subject of research is methods and models of computer-oriented analysis of measurement data on the soil and climatic state of the greenhouse microclimate. The main scientific and practical effect of the article is the development of the theory of intelligent information technologies for monitoring and control of greenhouse microclimate through the development of methods and models of distributed aggregation and intellectualised transformation of measurement data based on fuzzy logic.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2023, 13, 1; 19--35
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of irrigation interval on temperature distribution in soil profile under solarization applications in greenhouses
Autorzy:
Oz, H.
Coskan, A.
Atilgan, A.
Powiązania:
https://bibliotekanauki.pl/articles/60596.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
irrigation interval
temperature distribution
soil profile
solarization
greenhouse
irrigation
Opis:
The aim of soil solarization is to control soil borne pathogens and weeds heating with solar energy of soil which is sufficiently wetted. Soil water content is the one of the most important factors affecting soil solarization. Humidity level is important to convey temperature from the upper layers to down layers of soil in solarized soil. For this purpose, the study was conducted in plastic greenhouse in Isparta province. Beginning of the study, all plots were irrigated to reach the field capacity, and then the all plots were irrigated in 5 days irrigation interval during the experiment periods. Temperature distribution was measured in 5, 10, 20 and 30 cm of the soil profile along the experiment periods. As a result of this study, increasing of soil temperature and effectiveness of solarization decreased with together the water content of soil in upper layers. However, the soil temperature increased with irrigation in the down layers.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2013, 1/III
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of effects of outdoor relative humidity of fan pad cooling effects in greenhouses
Autorzy:
Oz, H.
Atilgan, A.
Powiązania:
https://bibliotekanauki.pl/articles/61431.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
cooling efficiency
determination
outdoor relative humidity
fan pad
cooling effect
greenhouse
Isparta province
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2015, III/2
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł

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