Crew 205 Green Hab Report – 16-FEB-2019
GreenHab Officer: Nathan Hadland
Environmental control: Heating and Cooling w/ ambient air (4.5 hrs)
Shade Cloth (40%)
Average temperatures:
Low: 16.9°C
High: 26.8°C
Hours of supplemental light: 5 Hours
Daily water usage for crops: 12 gallons
Water in Blue Tank: ~ 228.5 gallons
Time(s) of watering for crops:
TIME NOTED TEMPERATURE(° C ) / HUMIDITY(%)
[AT TIME OF WATERING]
1) 09.00 AM 25° C / 20 %
2) 12.00 PM 22.2° C / 24 %
3) 15:30 PM 21.5° C / 23 %
4) 18:15 PM 20.5° C / 35 %
Changes to crops: Some of the Arabidopsis seedlings died overnight due to the regolith drying out (see narrative). Damp paper towel germinations are starting to sprout.
Narrative: Arabidopsis seedlings were transferred into collected regolith samples yesterday and watered with Hoagland’s hydroponic nutrient supplement. However, some of the regolith samples are exhibiting interesting wettability properties and appear to be absorbing the water at an extremely high rate, causing the samples to dry out quickly. After watering with approximately 5 mL per 15 mL of regolith substrate yesterday evening, the samples dried out by this morning and several of the experiments had died. We will transfer additional seedlings into the samples later this evening. The damp paper towel germinations are starting to sprout as well so we will have additional seedlings available for experiments.
The digitized inventory of seeds as well as an inventory of the equipment available in the GreenHab and Science Dome is nearing completion and will be available to future crews prior to their rotations. More information will be available in the next Science Report.
The cucumbers that we kept in their pots are looking healthier. However, the peas are not improving and the crew will continue to keep an eye on their progress. The door was opened at 1100 hours for ambient airflow and closed at 1530 hours to prevent dramatic climate shifts.
Harvest: None.
Support/supplies needed: None.