SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Competitiveness of Zacatecas (Mexico) Protected Agriculture: The Fresh Tomato Industry

ANTONIO, I. C..

Cobertura de casas de vegetação com plástico transparente. Cultivo protegido. Pesquisas com cultivo protegido na Embrapa. Construção das casas de vegetação. Escolha do local. Escolha do modelo de estrutura. Escolha da madeira. Cuidados com a estrutura. Cuidados com o plástico.

Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)

Palavras-chave: Brasil; Amazonas; Manaus; Environmental control; Controle Térmico; Cultivo Protegido; Estufa; Greenhouses; Protected cultivation.

Ano: 2001

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/671344

AgEcon

Padilla-Bernal, Luz E.; Rumayor-Rodriguez, Agustin; Perez-Veyna, Oscar; Reyes-Rivas, Elivier.

The industry of fresh tomato production under protective structures in Zacatecas has undergone accelerated growth in recent years. Free trade, market globalization, new trends in the agro-food sector, as well as the food and financial crises, are impacting its competitiveness. In this study competitiveness of the industry of fresh tomato production under protective structures in Zacatecas was evaluated to provide elements that contribute to the design of policies aimed toward development of sustainable competitiveness. A systemic competitiveness model was applied, and a SWOT analysis was performed. The information was obtained through interviews with technicians and/or owners of the production units and complemented with interviews with researchers and...

Tipo: Journal Article

Palavras-chave: Development; Technology; Greenhouses; Systemic competitiveness; Agricultural Finance; Farm Management; Industrial Organization; Productivity Analysis.

Ano: 2010

URL: http://purl.umn.edu/92641

Efeito da solarizacao sobre a producao de tomate de mesa e de industria em uma estufa modelo capela.

Efeito de herbicidas sobre plantulas de seringueira (Hevea spp).

REIS, N. V. B.; CHARCHAR, J. M.; CARRIJO, O. A..

A tecnologia de controle de nematóides nos solos de estufas, em uso, envolvem o uso de processos físicos(vapor), físicos/químicos e químicos que são onerosos, insalubres, de difíceis manuseio e poluidores do meio ambiente. Esta pesquisa tem por objetivo adaptar o processo de solarização de solos, para as condições de plantio protegido de tomate do DF. Os testes com 6 cultivares desenvolvidas em áreas infestadas como Meloidogyne incognita raça 1 e Meloidogyne javanica e com solarização evidenciaram a eficácia da tecnologia de solarização no controle de nematóides de galhas.

Tipo: Séries anteriores (INFOTECA-E)

Palavras-chave: Tomate industrial; Solarizacao; Controle; Brasilia; Distrito Federal; Brasil; Processing tomato; Solarization; Nematodes; Control.; Cerrado; Cultivo Protegido; Estufa; Lycopersicon Esculentum; Meloidogyne Javanica; Nematóide; Meloidogyne Incognita; Tomate.; Brazil; Greenhouses; Protected cultivation; Tomatoes..

Ano: 1999

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/768855

LIMA, A. de A.; PEREIRA, R. C..

Foram realizados dois ensaios em condicoes de casa de vegetacao para avaliar o efeito de herbicidas sobre as plantulas.

Tipo: Comunicado Técnico (INFOTECA-E)

Palavras-chave: Casa de vegetacao; Brasil; Bahia; Rubber tree; Species; Stocking plant; Herbicides evaluation.; Controle Químico; Espécie; Erva Daninha; Hevea; Herbicida; Muda; Seringueira.; Greenhouses; Weeds..

Ano: 1985

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665277

Efeitos de diferentes substratos na produção de mudas de alface.

RODRIGUES, V. G. S.; RICCI, M. dos S. F.; VIEIRA, A. H..

O presente trabalho teve por objetivo testar diferentes tipos de substratos, bem como as mais adequadas proporções entre seus constituintes, para a produção de mudas de alface.

Tipo: Comunicado Técnico (INFOTECA-E)

Palavras-chave: Embrapa Rondônia; Porto Velho (RO); Rondônia; Amazônia Ocidental; Western Amazon.; Alface; Lactuca Sativa; Adubo Orgânico; Muda; Produção; Estufa; Substrato de Cultura; Campo Experimental.; Lettuce; Organic fertilizers.; Greenhouses; Seedling production.

Ano: 1998

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/704124

Enhancing the efficiency of evaporative cooling pads for livestock barns and greenhouses by moisture adsorption

Samer, Mohamed.

High levels of relative humidity negatively affect the efficiency of the evaporative cooling pads installed in livestock barns and greenhouses. Consequently, the productivity decreases causing economic losses. Therefore, this project aims at prototyping innovative dehumidifying/desiccant segments to be installed on the conventional cooling pads enabling them to provide suitable microclimate conditions, especially temperature and relative humidity, for animals and plants. The hypothesis is that desiccant segments adsorb air moisture before introducing the air into the pads; consequently, the treated air is then able to absorb more moisture from the cooling pads, i.e. the cooling pads evaporate more water in the treated air, where water evaporation requires...

Irrigação de hortaliças em solos cultivados sob proteção de plástico.

Palavras-chave: Agricultural Engineering; Farm Buildings and Construction cooling pads; Livestock housing; Heat stress; Indoor air quality; Greenhouses.

Ano: 2015

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3450

CARRIJO, O. A.; OLIVEIRA, C. A. da S..

Retencao de agua no solo; Qualidade da agua; Temperatura da agua; Metodos de irrigacao; Sulcos; Aspersao; Gotejamento; Xique-xique; Fitas ou tripas; Convencional; Frequencia de irrigacao; Volume de agua a aplicar; Aplicacao de fertilizantes via agua de irrigacao em estufas; Sistema venturi; Sistema de diferencial de pressao ou do tanque; Bombas injetoras; Principais fontes de nutrientes; Recomendacoes de fertirrigacao para algumas hortalicas cultivadas sob protecao de plastico ou PVC; Tomate; Pepino; Pimentao.

Tipo: Circular Técnica (INFOTECA-E)

Palavras-chave: Sweet pepper; Cucumber; Fertirrigation; Plastic house.; Capsicum Annuum; Cultivo Protegido; Cucumis Sativus; Estufa; Fertirrigação; Hortaliça; Lycopersicon Esculentum; Irrigação; Pepino; Pimentão; Plasticultura; Tomate.; Greenhouses; Irrigation; Protected cultivation; Tomatoes; Vegetables..

Ano: 1997

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/759869

Irrigation water pricing between governmental policies and farmers’ perception: Implications for green-houses horticultural production in Teboulba (Tunisia)

AgEcon

Chebil, Ali; Frija, Aymen; Thabet, Chokri.

A positive mathematical programming model was constructed in this study to assess the effect of three water pricing scenarios on Teboulba’s agricultural production systems. The effects of these scenarios were estimated for three groups of farmers from three irrigated districts. Results show that water demand in group 1 remains inelastic until achieving the price of 0.20 TD. A price above this level decreases water consumption, farmer’s incomes as well as seasonal labor demand. For groups 2 and 3, the water demand curves remain highly inelastic even with a full cost recovery price. However, once reaching this last price, the model shows important income reductions reaching 20% of the current observed income. Moreover, a pricing policy aiming to recover...

Tipo: Article

Palavras-chave: Water pricing; Positive mathematical programming; Greenhouses; Economic impact; Teboulba; Environmental Economics and Policy; Farm Management; Resource /Energy Economics and Policy; Q15; Q18.

Ano: 2010

URL: http://purl.umn.edu/118863

Measured Energy use in a Greenhouse with Tomatoes Compared to Predicted use by a Mechanistic Model Including Transpiration

Measured Energy use in a Greenhouse with Tomatoes Compared to Predicted use by a Mechanistic Model Including Transpiration

Sven Nimmermark.

In regions with a colder climate the use of heat energy for climatization of greenhouses can be significant. Beside outdoor temperatures and climate also transpiration affects the use of heat energy since heating and ventilation or dehumidification may be required in order to keep the humidity in the greenhouse below levels which may lead to plant diseases. A reliable model is a powerful tool to predict energy use for greenhouse cultivation. Thus, a mechanistic model including transpiration and energy use for dehumidification and hourly output data was developed from an older simpler model. To be reliable, modelled data must fit with real data. The aim of the present study is to compare measured and modelled use of heat energy. Thus, energy use for a...

Palavras-chave: Greenhouses; Energy; Measurements; Modelling.

Ano: 2015

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3100

Nimmermark, Sven.

Prediction of total solar irradiance on tilted greenhouse surfaces

Palavras-chave: Greenhouses; Energy; Measurements; Modelling.

Ano: 2015

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3100

Ronoh, Erick K..

Solar radiation is the driving force for the surface energy balance in buildings such as greenhouses. The greenhouses are generally tilted towards the sun in order to maximize the solar irradiance on the surfaces. Precise computation of the solar radiation received on these surfaces assumes an important role in the energy simulation. It is practical to calculate the total solar irradiance on the tilted surfaces based on the solar global and diffuse radiation intensities on horizontal surfaces. In this work, a south-facing thermal box inclined at 26.5° from the horizontal was used for solar radiation measurements. Additionally, the recorded solar radiation data were retrieved for the study location and used to develop an empirical correlation. The...

Thermal energy use in three Swedish greenhouses – the outdoor temperature-dependent variation and the influence of wind speed under no-sunlight conditions

Palavras-chave: Solar radiation; Greenhouses; Tilted surface; Diffuse fraction; Clearness index.

Ano: 2017

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3903

Katarzyna Maslak; Swedish University of Agricultural Sciences, Dept. of Biosystems and Technology, Alnarp; Sven Nimmermark; Swedish University of Agricultural Sciences, Dept. of Biosystems and Technology, Alnarp.

Thermal energy is used in greenhouses for the temperature and humidity control. In the North of Europe, energy expenditures have a significant share in the total greenhouse production cost. A study was performed to quantify and analyze the use of thermal energy in three Swedish commercial greenhouses (two with tomatoes and one with ornamental plants), to test the hypothesis that substantial amounts of heat are used at higher outdoor temperatures, and to investigate the influence of the wind speed on the energy use under no-sunlight conditions. Hourly climate data were registered by means of Priva control systems. The use of thermal energy was computed based on the readings from the flowmeters and the temperature of the inlet/outlet water to/from the...

Palavras-chave: Agricultural Engineering Thermal energy use; Greenhouses; Tomatoes; Ornamental plants; Wind speed.

Ano: 2014

URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2923

Thermal energy use in three Swedish greenhouses – the outdoor temperature-dependent variation and the influence of wind speed under no-sunlight conditions

Maslak, Katarzyna; Nimmermark, Sven.