OpenAg Wiki Archive

Archived Contents from the original OpenAg Wiki (snapshot on Apr 8, 2020)

The archived wiki only includes information up the v3.0 version of the PFC-EDU, and is here for preservation purposes. You can find resources about the latest version of the PFC v4.0 on the Personal Food Computer resources page.

Nutrient formula

How Peter makes his stock and final dilution of nutrients:

• 100x (1:100) dilution stock which produces 100ppmN (parts per million of Nitrogen)
  • 5-12-26 (green)
  • 15-0-0 (blue)

• For Food Servers to grow leafy greens we want to use 150ppmN:
  • 100ppm 5-12-26 put 400ml stock in 10 gal.
  • 50ppm 15-0-0 put 200ml stock in 10 gal.

• For PFCs to grow leafy greens we want to use 150ppmN:
  • 100ppm 5-12-26 put 30 ml stock in 3 liters of water.
  • 50ppm 15-0-0 put 15 ml stock in 3 liters of water.
  • Both of the above solutions are put in the same 3 liter (large) water bottle for the PFC.

Math:

1:100 = x:3000ml, x=30ml of 5-12-26 stock.
1:200 = x:3000ml, x=15ml of 15-0-0 stock.

Keep both solutions separate! or they will precipitate calcium and make a mess. Once they are diluted to the final concentration, they can safely be mixed.