A glasshouse, as the name suggests, is a structure of mainly glass to allow protected cultivation of plants.
Yes. They are kept to pollinate plants in glasshouses.
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Glasshouses have air vents to regulate temperature and humidity levels, ensuring optimal growing conditions for plants. By allowing hot air to escape and fresh air to enter, vents help prevent overheating and reduce the risk of fungal diseases. Additionally, proper ventilation supports air circulation, which is essential for photosynthesis and overall plant health.
David Mulwa has written: 'Redemption' 'Glasshouses' 'Master and Servant' -- subject(s): Fiction, African fiction, Kenyan fiction
All year round. Tomatoes are ripe in the south of the continent from about December to April, but the sub-tropical areas can grow them when the season finishes in the south. They are also grown in glasshouses during the winter months but these are inferior in quality.
They affect plant growth because they protect the plants and crops and provide shelter for them. It is made of glass because it is transparent and lets the sun rays through. It also keep the plant away from violent weathers and protects them from animals such as birds.
These are the gases that envelope Earth and keep the warmth in, like the glasshouses or greenhouses we use to grow things in. Trouble is, its ok in a greenhouse but on a global scale its catastrphic. Greenhouse gases is a biological term rather than a geographical and the most common are the obvious carbon di-oxide, methane from billions and billions of farting, burping cattle, sheep pigs, and people, rubbish dumps etc, Helium is another biggie and a few lesser ones.
Main characteristics of market gardening : a) very high outputs b) increasing use of glasshouses (which protect crops from poor weather conditions) c) a lot of labour (skilled labour)
Tomatoes are pollinated when a bee visits the blossom. You can also help the plant to set more tomatoes by using a bloom set spray. Tomatoes are fertilized by cross pollination by flying insects, especially when grown outdoors. When grown in glasshouses (greenhouses) fertilization may be done by the gardener using a camel-hair brush to pass pollen from flower to flower. Gently shaking the plants will free pollen into the air, which may float onto a neighboring plant. In the past, I have used the shaking method on ten tomato plants in a small greenhouse, and had good results.
Greenhouses, sometimes called glasshouses, provide the right conditions for plants to grow for several reasons: The transparent material allows sufficient natural light for photosynthesis during the summer months, while additional lighting gives a 'longer day' during the winter. The greenhouse effect also happens in greenhouses. Short wave radiations entering the greenhouse becomes longer wave radiation as it reflects off surfaces. This longer wave radiation cannot leave as easily so the greenhouse heats up. Burning fuels to raise the temperature when the external heat is too low also produces carbon dioxide and water vapour. the water vapor maintains a moist atmosphere and therefore reduces the loss of water by transpiration. The carbon dioxide is a raw material of photosynthesis. Glasshouses also protect plants from things such as strong winds and heavy rain. Also, growing plants in a hydroponic culture provides exactly the right balance of mineral ions for the specific crop being grown.
Greenhouse is a structure covered with either polyethylene or glass which entrap energy of sunlight in to it as the solar energy received from sunlight is converted into long waves .The covering material does not allow energy to escape hence the greenhouse effect created.
Legesse Negash is Professor of Plant Physiology, Faculty of Science, Addis Ababa University (AAU). He got his BSc (1979) and MSc (1982) in Biology from AAU and his PhD in Plant Physiology from Lund University, Sweden (1988). Legesse Negash has established a Plant Tissue Culture and Seed Physiology Laboratory, glasshouses and a nursery,within the Department of Biology (AAU). He is the Founder and Leader of "Center for Indigenous Trees Propagation and Biodiversity Development in Ethiopia". He has served as the Editorial Board Member, Editor, and Editor-in-Chief of Sinet: Ethiopian Journal of Science. (published by the Science Faculty, AAU), and as an Editorial Board Member of South African Journal of Botany (published by the South African Association of Botanists). He is member of several professional societies, including the Biological Society of Ethiopia and International Union of Forestry Research Organizations. He has alsoauthored and co-authored many peer-reviewed scientific papers and book chapters on topics related to the propagation biology and physiology of indigenous trees. His latest book entitled: "A Selection of Ethiopia's Indigenous Trees: Biology, Uses and Propagation Techniques" (ISBN 978-99944-52-27-9, 386 pp.) is scheduled for publication in 2010. Legesse Negash is winner of several awards, including from the Stockholm-based International Foundation for Science, Crop Science Society of Ethiopia, and Ethiopian National and Regional Green Awards.