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Hotspots for crops on Mars
To estimate the optimal landing places on Mars the researchers used several of the Martian maps showing essential information that are made freely available by JPL, the Arizona State University and NASA. “Without them this endeavour would not have been possible”, explains Wieger Wamelink. The maps contain information about mineral content, which can for example be related to calcium and heavy metal content. But also element maps for potassium, chloride, iron and silicon and maps for radiation level, climate, terrain including altitude and cosmic radiation were used.
Not too much heavy metals
High levels of heavy metals in the soil and strong radiation make a location unsuitable for establishment," explains Line Schug. High contents of heavy metals and high doses of radiation make a location unsuitable for colonisation," explains Line Schug. "While we see high temperatures or calcium levels and a relatively flat terrain as positive."
3D maps of Mars
The maps were merged and the average score was calculated, with high scores marking the best landing sites from a plant’s perspective. In the past the Mars Pathfinder and Viking 1 landed at hotspots to establish a colony, however, MSL Curiosity and Viking 2 landed on less favourable spots.
Research on food for Mars and Moon
To feed the future humans living on Mars or the moon the Wageningen research project ‘Food for Mars and Moon’ aims to set up a sustainable agricultural system. It is based on the presence of soils and water (in the form of ice) on both Mars and the moon. For this Earth-based research, the researchers are using soil simulants delivered by NASA. The simulants originate from a volcano in Hawaii (Mars) and a desert in Arizona (moon). The experiments started in 2013. Nowadays the team is able to grow over a dozen crops; the only species that has resisted their efforts so far is spinach. However crops such as green beans, peas, radish, tomato, potato, rucola, carrot and garden cress all seem possible. The crops were analysed for heavy metals and also alkaloids to check their safety for human consumption. After the plants had passed these tests we organized a dinner based on the harvested crops for the people that supported our research via the crowdfunding campaign. Recently we proved that Earthworms can live and propagate on Mars soil simulant, an important step towards a sustainable agricultural ecosystem necessary for growing crops on Mars.
Map of the ideal landing sites on Mars from a plant perspective. Blue colours indicate high potentials, with the darkest blue as the best sites, red colours indicate less good sites with dark red as the worst. Both poles are not included, because of lack of data, as is the Hellas Basin. And the poles consist mainly of CO2 and water ice. A few landmarks on Mars are indicated with stars. Also given are former and future landing sites of Mars landers.
Source: Wageningen University & Research
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