Crew GreenHab Officer Daily Report
Sol # 10
Crew # 161
Crew GreenHab Officer: Natalia Glazkova
1/19/16
Watering duration: once a day in the morning. Moisture level of the soil in the evening 33%.
Light exposure: 18h per day (7.00-24.00)
Morning temperature: -
Evening temperature: 20ºC
Height lamp bulbs to plant: 17’’
Several hypotheses for reduced sprouting success (of both beans and radish) in the 30/70 soil mix:
30/70 soil content mixture is mostly clay and therefore provides poor water drain.
high moisture level because clay soil is dense and holds water.
Long term exposure to the UV light could be the reason of the yellowing leaves.
I plan to reduce the time of exposure to the UV light down to 15 h per day and will keep the moisture level of 25%. I also planted rest of the beans today (soil samples #6,#7; mix ratio: 50/50, 30/70), so we will have a chance to see whether the changes would affect the plants.
I was not planning to transplant the seedlings to the bigger pots. Due to the instructions received before the mission, I suppose to dispose the material at the end of the rotation.
BR,
Natalia Glazkova
Crew HSO/ Biologist