crafting (in RL)

to test soil pH:

vinegar + soil ==> bubbles == basic

baking soda + soil ==> bubbles == acidic

I wonder if I could use ashes to test if acidic instead of baking soda.

can also use the purple cabbage method, but I don't have purple cabbage.

if I can find a way to preserve them properly it might be worth it to grow some just for pH testing.

to modify soil pH:

vinegar or coffee grounds to make more acidic

ashes to make more basic

soap:

ashes and animal fat.. TODO: elaborate on this recipe. (and actually test it)

vinegar:

TODO: look up a good way to make a bunch of vinegar easily