The conceptualization, design fabrication and construction of a greenhouse as part of a botanical garden within the premises of the science laboratory technology department of the federal polytechnic, Kaura Namoda, is a unique and rewarding experience laced with ecological, cultural, educational and economic benefit that will last for several generations of students on campus.The fabricated greenhouse which are frames of inflated structures covered with a transparent materials in which crops are grown under controlled environmental conditions have been evolved to create favorable micro-climates, which favors the crop production could be possible all through the year or part of the years as required.Other technologies involved in the greenhouse design are used for controlled environmental plant production which are associated with the off-season production of ornamental and foods of high value in cold climate areas where outdoor production is not possible.Hence, the primary environmental parameter traditionally controlled under the fabrication exercise is temperature, usually providing heat to overcome extreme cold conditions. However, environmental control can also include cooling to mitigate excessive temperature, light control either shading or adding supplemental light, carbon dioxide levels, relative humidity, water, plant nutrients and pest control.
A greenhouse is a structure with a glass or plastic roof and side walls that is used for the production of ornamentals and ford crops and may be used seasonally or year round. The closed environments, of a greenhouse has its own unique requirements, to be compared with outdoor production. Pest and diseases, and extremes of heat and humidity, have to be controlled, and irrigation is necessary to provide water. Significant inputs of heat and light may be required, particularly with winter production of warm-w earthier crops. Greenhouse for commercial production can be classified as free-standing or getter connected. A ---- Standing greenhouse can have a Quonset (hoot), gothic roof shades. The Quonset is usually the least expensive and is available in widths up to 36. Gothic design have higher light transmission and shed snow easier. Gable designs may use trusses to span a width up to 60. A gather-connection greenhouse is a series of tresses connected together at the gather level. Individuals bays very in width from 12 to 25 and have a clearance of 8’ to 16’ to the gathers. Bays can be put together to get any width, standard lengths; greenhouse desired. Blaustein, J. 1979).
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