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Study: Potatoes can grow on Mars

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Re: Study: Potatoes can grow on Mars

#31
post #28
post #25

Earlier quoted context omitted.

It's possible to grow potatoes hydroponically, so growing them in unprocessed Martian regolith is unlikely to be important until the number of Martians hits six figures.

So you're going to bring your own soil everywhere? That's the unsustainable part. Terraforming would take thousands of years.

Hydroponic farming doesn't use soil ...

https://en.wikipedia.org/wiki/Hydroponics

Re: Study: Potatoes can grow on Mars

#32
post #28
post #25

Earlier quoted context omitted.

It's possible to grow potatoes hydroponically, so growing them in unprocessed Martian regolith is unlikely to be important until the number of Martians hits six figures.

So you're going to bring your own soil everywhere? That's the unsustainable part. Terraforming would take thousands of years.

Bring some worms, use human-derived fertilizer. Not terribly impossible.

Re: Study: Potatoes can grow on Mars

#33
post #28
post #25

Earlier quoted context omitted.

It's possible to grow potatoes hydroponically, so growing them in unprocessed Martian regolith is unlikely to be important until the number of Martians hits six figures.

So you're going to bring your own soil everywhere? That's the unsustainable part. Terraforming would take thousands of years.

Hydroponically means "using water as a medium", so not bringing your own soil and depending on whether there's water available on Mars. You would still need to put nutrients in the water, but it would be a path to take until you get composting working.

Re: Study: Potatoes can grow on Mars

#34
Why exactly did this experiment require a satellite? For biological purposes Martian gravity is probably closer to Earth gravity than to microgravity, and all the other conditions could be reproduced for cheaper and at larger scale in a ground laboratory.

This smells of a publicity stunt to me.

Re: Study: Potatoes can grow on Mars

#35
post #8

I think this article is wrong about the temperature. There is little information available but here is the original press release http://cipotato.org/press-room/blog/indicators-show-potatoes... From what I can gather they used soil from some Peruvian desert and increased the CO2 in the chamber. But there is no mention of simulating the -80F night temperatures typical on Mars.

Potatoes, especially sweet potatoes have been cultivated at high altitude for centuries in South America. You are probably right about -60C being too low, but if they provide some shelter potatoes could handle very low overnight temperatures without needing the amount of climate control that other crops would need. Which is one reason why they are looking at this crop.

Re: Study: Potatoes can grow on Mars

#36
post #28

Earlier quoted context omitted.

So you're going to bring your own soil everywhere? That's the unsustainable part. Terraforming would take thousands of years.

Hydroponically means "using water as a medium", so not bringing your own soil and depending on whether there's water available on Mars. You would still need to put nutrients in the water, but it would be a path to take until you get composting working.

> depending on whether there's water available on Mars

Actually, we've recently confirmed that there are at least five million cubic kilometers of water ice on Mars ...

https://en.wikipedia.org/wiki/Water_on_Mars

https://en.wikipedia.org/wiki/Water_on_Mars#Present_water_ic...

Re: Study: Potatoes can grow on Mars

#37
post #9
post #8

I think this article is wrong about the temperature. There is little information available but here is the original press release http://cipotato.org/press-room/blog/indicators-show-potatoes... From what I can gather they used soil from some Peruvian desert and increased the CO2 in the chamber. But there is no mention of simulating the -80F night temperatures typical on Mars.

I'm pretty sure Martians measure temperature in Celsius.

Celsius is equally arbitrary to Fahrenheit.

No, Martians measure in Nano Yocto Planck Degrees above Absolute Zero, I hereby dub that unit the Plancktigrade.

Re: Study: Potatoes can grow on Mars

#39

On video there were liquid water. I didn't know such exist in mars.

Potatoes don't exist on Mars, either. But if we're going there, and bringing potatoes, we'll either be bringing water, or distilling it there.

> we'll either be bringing water, or distilling it there

Probably just melting some of the more than five million cubic kilometers of water ice that has been identified at or near the surface of modern Mars ...

https://en.wikipedia.org/wiki/Water_on_Mars

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