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[[Image:Hydroponics.jpg|200px|Link=Hydroponics|An example of vertically stacked hydroponics. A system like this would allow a person to be self-sustaining for vegetables in just a few square meters. This makes it particularly useful for urban settings.]]
[[File:Mayapedal02.jpg|200px|Link=Bicycle technology|]]
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'''[[Hydroponics]]''' is the practice of growing plants in nutrient-enriched water rather than soil.
'''[[Bicycle technology]]''' ("biketech") is the extension of the basic components of bicycle construction to a larger field of uses. Power delivered to pedals (by arms, legs, or other source of motion), transmitted by bicycle chains, drive cables, and/or bicycle gears is applied to power machines or generate electricity. The supplied motion may be used for transport, pumping water, vacuum pumping, seed winnowing, blending food, mowing grass, spinning washing machines, and so on. Thus, without the infrastructure for electricity or internal combustion, the motive power of human beings can be multiplied and extended to alleviate tedious tasks in agriculture. When all aspects are considered, this technology is probably much less expensive than the current electric way of doing things (build-out for electric infrastructure, mining copper for electric motors, burning fossil hydrocarbons in power plants causing climate disruption etc.). ([[Bicycle technology|more...]])'''
 
Hydroponics is incredibly productive and requires little space. For example, [[Factor e Farm]]'s experiments found that they could grow $1 of lettuce per square foot per week. And the [http://carbon.org/ Institute of Simplified Hydroponics] has found that they can grow 2kg of vegetables a day on 20m<sup>2</sup> of space [http://webcache.googleusercontent.com/search?q=cache:ezRcpPE6EGwJ:www.carbon.org/senegal/india1.doc&cd=4&hl=en]. Indoor growing in a greenhouse greatly reduces losses to pests.
 
See [http://www.hydroponicsonline.com/blog/easy-to-build-hydroponic-system here] for free instructions on building several different hydroponic systems. N55 have a design for a vertical hydroponic system [http://www.n55.dk/MANUALS/HOME_HYDRO/HOME_HYDRO.html here]. See [http://en.wikipedia.org/wiki/Hydroponics Wikipedia on hydroponics] for more information.
 
[http://hmeter.sourceforge.net/ Open source software for automating hydroponic systems].
 
[[Aquaponics]] is a kind of hydroponics that uses the water from fish tanks. This eliminates the need for an input of nutrients... '''([[Hydroponics|more...]])'''

Revision as of 17:55, 25 February 2011

Mayapedal02.jpg

Bicycle technology ("biketech") is the extension of the basic components of bicycle construction to a larger field of uses. Power delivered to pedals (by arms, legs, or other source of motion), transmitted by bicycle chains, drive cables, and/or bicycle gears is applied to power machines or generate electricity. The supplied motion may be used for transport, pumping water, vacuum pumping, seed winnowing, blending food, mowing grass, spinning washing machines, and so on. Thus, without the infrastructure for electricity or internal combustion, the motive power of human beings can be multiplied and extended to alleviate tedious tasks in agriculture. When all aspects are considered, this technology is probably much less expensive than the current electric way of doing things (build-out for electric infrastructure, mining copper for electric motors, burning fossil hydrocarbons in power plants causing climate disruption etc.). (more...)