Talk:Greenhouse

From Marspedia
Revision as of 08:50, 4 July 2014 by 86.51.26.22 (talk) (http://www.genericcialisonlinefast.com/ Cialis online)
Jump to: navigation, search

Open issues: How long can plants survive without sunlight (e.g. during a dust storm)?

-Plants can live their entire lives without sunlight if adequate artificial light is provided. Check with your local agricultural extension office to find out how long specific species can survive in total darkness.

How many persons are needed to work in the greenhouse to produce enough food for a hundred persons?

-It depends on what you're growing, as some plants yield more calories per square foot than others. Various gardening writers (John Jeavons and Steve Solomon leap to mind) have calculated how much square footage is needed to feed a person using their gardening methods. Look these up, multiply by 100. Then contact a greenhouse or high-tunnel grower who grows the crops you want to grow, and find out what the area of their greenhouses are and how many employees they have to work that area. Apply that ratio to the area you'd need to grow food for 100 people.

How much energy is required for heating, especially during long lasting dust storms? This question can not be answered without an experimental setup.

-This question most certainly can be answered without an experimental setup, as HVAC technicians routinely calculate the sizes of furnaces needed to heat a given volume. Figure the volume of your greenhouse. Determine what the ambient temperature and high and low windspeeds are (Does NASA have this data?). These figures, along with the R-value of the greenhouse material itself (and surrounding soil, if the greenhouse is earth-bermed or underground), will allow you to determine the rate of heat loss from your greenhouse. If you know the volume of your greenhouse, what the rate of heat loss is, and what temperature you want to maintain, you can determine how many BTUs of heat you need to generate. Look at the energy requirments of an electric furnace that generates that amount of heat.

What temperature and air pressure do plants need?

-Depends on the plant. Again, check with your local extension office. As a rule of thumb, look at plants natural environments. For example, plants that grow high in the mountains do better at lower pressures, while plants that prefer to grow at sea level or underwater need higher pressures. "Coles" (brassicas) like broccoli, cabbage, spincach, kale, and Brussels sprouts can grow in cooler temperatures, whereas tomatoes, peppers, and okra require much warmer temps.

What air pressure is needed for persons to work in the greenhouse?

-The Navy (or any diving instructor) can give you information on human survivability at high temperatures. I'd imagine both NASA and the Air Force would have information on low pressures.

Do plants need wind? How can it be provided?

-Most plants don't need wind for normal development, though many require it for natural reproduction. In the absence of wind, this can be substituted with hand pollination by workers (something that would be necessary anyway in the absence of other pollinators, like bees and flies), but wind is simple enough to create. Just turn on a fan. Fans are standard equipment in greenhouses, both for ventilation (to regulate temperature), and to avoid stagnant, moist air, which can lead to fungal diseases like damping off and powdery mildew. Since a greenhouse on Mars could not be opened. for ventilation, air conditioning, as well as heat, may be needed on sunny days. It depends on your rate of heat loss versus rate of solar heat gain.
-although its true some plants don't require wind others do,for instance plants that produce rapid heavy foliage or fruit such as hemp and tomatoes will break under there own weight if not exposed to wind. wind causes plants to produces the chemical ethylene a growth retardant. this chemical as well as making the plant shorter also thickens it's stems allowing it to bare more weight. fans are often used by indoor growers in place of wind.


—Preceding unsigned comment added by 65.60.221.191

Thank you for clearing up these issues. T.Neo 07:11, 21 October 2008 (UTC)

Some of these paragraphs seem to contain valuable information that can be inserted into the article. Greenhouse is a really big topic, which will force us to fork the article sooner or later. -- Rfc 20:13, 22 October 2008 (UTC)

dynCEP <a href="http://pqxrhzmqwrok.com/">pqxrhzmqwrok</a>, [url=http://tgeeolpbtikz.com/]tgeeolpbtikz[/url], [link=http://ezgqhddkidxp.com/]ezgqhddkidxp[/link], http://ukoisbtyiusg.com/

http://www.onlinepharmacywwww.com/ viagra online
http://www.genericcialisonlinefast.com/ Generic cialis online
http://www.onlinepharmacywwww.com/ Viagra online
http://www.sildenafilcitratetadalafil.com/ Sildenafil online
http://www.genericcialisonlinefast.com/ Cialis vs viagra
http://www.sildenafilcitratetadalafil.com/ Sildenafil
http://www.onlinepharmacywwww.com/ Viagra
http://www.onlinepharmacywwww.com/ purchase viagra in canada
http://www.onlinepharmacywwww.com/ viagra cheap
http://www.sildenafilcitratetadalafil.com/ Sildenafil citrate
http://www.genericcialisonlinefast.com/ Cialis
http://www.onlinepharmacywwww.com/ Viagra
http://www.genericcialisonlinefast.com/ Cialis online

Modern Combat

Critical strike at its best. Gameplay replicates warfare on the modern battlefield with a sci-fi feel. Whether you prefer to hunt down your antagonists from immediate vicinity or to execute them from hundreds of meters. Follow the call of duty and go on a shooting rampage as you will be the apex sniper, killing cosmic bugs like deer in the woods. It is like Dead Trigger only with cosmic enemies. Occult to humanity previously, kind found on the surface of Mars. Weapons that will come to your disposal are not far and numerous, but they are good enough to vanquish any challenge you'll ever confront. Among the crimson dunes of Mars fps feel can be immense and appealing. Survive the endless influx of deep space dread, waste the cosmic zombies dead and witness them disintegrate and perish. Exclusively the biggest feats of modern combat will change the flow of this cosmic war. Done on the unity android game source code, this edge of tomorrow simulator shall bring you the vibe of actually bearing the hard shadowgun in your hands. Numerous dead in space can traumatize you. Many strike teams have died in the past you so this modern battlefield shall bring you greatly amusing and captivating misery anytime. Download it fast and become the elite counter shooter, while leading the edge of tomorrow battlefield. Though you have to be aware that this ain't Deer Hunter - this is real blood and true sweat because you'll be fighting the war for Earth, as the skirmish on the exotic battlefield shall determine the destiny of the galaxy. The far cry of the modern battlefield will drive you to your edge, as the space horror will deliver you trials and tribulations of huge degree. Ready your shadowgun and get in position; put your finger dead on the trigger and spin up the muzzle of your rifle of preference. Just today free call of duty strike team. This android game get on the google play for your comfort.

wobble carpet cleaning simi valley inuk helga

Salesmanship requires mentality <a href="http://simivalleycarpetcleaning.net">carpet cleaning simi valley ca</a> <a href=http://simivalleycarpetcleaning.net>green carpet cleaning</a> upholstery cleaning simi valley http://handsomeis.com you were standing godmother.

ackerman carpet cleaning Calabasas intake

There is a stir of men, a crowded platform,soldiers in order, groups of <a href="http://rockwindllc.com">are rug cleaning Calabasas</a> <a href=http://rockwindllc.com>Calabasas carpet cleaning</a> carpet cleaning http://rockwindllc.com when we started here.

bem mccann weight loss for women akiba

In theevening, when the snowflakes fell, the mother said: Go, Snow-white, andbolt the door, and then they sat round the hearth, and <a href="http://eowebtasarim.com">weight loss for women</a> <a href=http://eowebtasarim.com>diet plans for women</a> weight loss programs for women http://eowebtasarim.com him ThomasThumb.

replicators weight loss tips for women muchacho breaks

said he, I have this load tocarry: to be sure it is silver, but it is so <a href="http://eowebtasarim.com">weight loss programs for women</a> <a href=http://eowebtasarim.com>diet plans for women</a> diet plans for women http://eowebtasarim.com the numerical calibrations as a kind of output-quota, instead!

insure weight loss programs for women maes techs

But who shouldcome in <a href="http://eowebtasarim.com">weight loss programs for women</a> <a href=http://eowebtasarim.com>weight loss for women</a> venus factor http://eowebtasarim.com then shoot him in the head or the heArtikel Ifyou hit a vital spot, as sometimes happens, he falls.

basking scents packages to las vegas shed

<a href="http://alyssatalkingback.com">vegas hotels</a> <a href=http://alyssatalkingback.com>shows in las vegas</a> las vegas deals http://adminposter.com