What to do with all these ashes?

Found this on Permies
“Add them to urine or chicken manure. Ashes are high in potassium, moderate in phosphorus; urine is high in nitrogen and moderate in phosphorus. Together, ashes and manure make a perfectly balanced fertilizer. If you add 1 part ashes and 1 part urine or chicken manure to 10 parts water, you will have a fertilizer that you can apply without worrying about it being too hot and burning your plants. If you want it to be longer acting, you can add 1 part of biochar to the mix and let it sit so that a lot of the nutrients are absorbed onto the char.”