Mushroom cultivation requires fairly precise chemical composition of substrate (a.k.a. growing medium). Let's pretend we're growing shitakes and that this is the required composition of their substrate:
Nitrogen | Benzene | Toluene | Dioxygen Diflouride 5% | 5% | 10% | 80%
We want to create an appropriate substrate from materials we have on hand which we know the chemical composition of.
Material | Nitrogen | Benzene | Toluene | Dioxygen Diflouride apples | 5% | 0% | 5% | 90% oranges | 20% | 20% | 50% | 10% Etc...
How does one calculate this? It reminds me of solving matrices in high school. Is this something that can be done with matrices? What is this problem called? What do I need to know to solve it?