GreenHab Report – May 19th

Crew 281 GreenHab Report 19 May 2023
GreenHab Officer: Megan Kane
Environmental control: mixed door open/ door open with fan
Average temperatures: 89.7 °F
Hours of supplemental light: None
Daily water usage for crops: 2.25 gallons
Daily water usage for research and/or other purposes: 1.59 gallons
Water in Blue Tank 168.51 gallons
Time(s) of watering for crops:
0700: refilled 7 water bottle (3.5 L) watered other plants as needed 2 L
1830: refilled 1 water bottle (500 mL) watered other plants as needed 2 L
Changes to crops:
Several of the tomatoes that had shown stress on Sol 0 have shed a few of the leaves that showed stress at the time. Their appearance had remained similar (chlorosis with purple veins and necrotic spots) for the past several days prior to abscision. New growth on all plants looks to be green and in good health.
Cucumbers are closer to being ready to harvest. There are 3 cucumbers and more flowers that may become cucumbers.
In the morning the GreenHab was checked and watered as required. Initial temperature was 71.4 degrees Fahrenheit at at 41 % humidity. Humidity remained above 10 % throughout the day. The cooler temperature and increased humidity seems to have cheered up the plants. While the greenhab made it up to 105 degrees, it did not stay there long due to the afternoon storm.
The watering experiment is going well.
The experimental cooling setup which uses a cloth with water seems to be helping a little with the temperature and humidity, espcially at night when the building can be closed, however we will know more in the next couple of days. The surface area for evaporation and amount of available water is limited but, with more matierials, we could potentially try and keep the temperature under 100 degrees Fahrenheit and increase humidity so that stomata can open to allow photosynthesis. The prototype passively evaporated 1 liter of water and was not refilled until evening. Tomorrow checks will be done earlier in the day to verify water level over time.
Harvest: (include which crop and mass in grams):
Lettuce 34
Rocket(Arugula) 1
Micro greens 8
Support/supplies needed: None

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