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During the existence of the United States Air Force, there have been many plants that have been owned by the service and were operated by private contractors. These facilities were designed so that they would build aircraft parts for the government.
This being said, many plants grown in a space flight environment have been significantly smaller than those grown on Earth's surface and grew at a slower rate. [10] In addition to the varying effects of gravity, plants grown on the surface of Mars will be exposed to much higher levels of radiation than on Earth unless protected.
Plants can metabolize carbon dioxide in the air to produce valuable oxygen, and can help control cabin humidity. [3] Growing plants in space may provide a psychological benefit to human spaceflight crews. [3] Usually the plants were part of studies or technical development to further develop space gardens or conduct science experiments. [1]
United States Air Force Plant 42; W. Wyman-Gordon Grafton Plant This page was last edited on 5 April 2015, at 03:35 (UTC). Text ...
A Veggie module weighs less than 8 kg (18 lb) and uses 90 watts. [7] It consists of three parts: a lighting system, a bellows enclosure, and a reservoir. [8] The lighting system regulates the amount and intensity of light plants receive, the bellows enclosure keeps the environment inside the unit separate from its surroundings, and the reservoir connects to plant pillows where the seeds grow.
A plant only reacts to gravity if the gravistimulation is maintained for longer than a critical amount of time, called the minimal presentation time (MPT). For many plant organs the MPT lies somewhere between 10 and 200 seconds, and therefore a clinostat should rotate on a comparable timescale in order to avoid a gravitropic response.
Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant in response to gravity pulling on it. It also occurs in fungi. Gravity can be either "artificial gravity" [clarification needed] or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms.
Aeroponic cultivation involves growing plants in an air culture, allowing them to develop and grow naturally. [2] [failed verification] Aeroponic growth specifically refers to the process of growing plants in an air culture. An aeroponic system refers to the collection of hardware and components designed to support plant growth in an air culture.