Poop: The Gardener's Caviar
I've often spoken of the interconnectedness of plant/animal/fungal life, and how trying to produce food in one area often leads to happy little Bob Ross accidents and necessary symbioses between the processes.
As a gardener simply trying to grown their own fruits and vegetables, you can certainly stop there, but should you? You will inevitably have to head to the store to buy complicated chemical fertilizer mixtures the more you get into it as a hobby, and while you should still try to know or at least chart the nutrient requirements of everything you're trying to produce to maximize production, can't there be an easier way?
Sure there is - poop. Specifically, poop from livestock, though technically you can use just about any poop if composted properly. Animal poop runs the gamut from "better than nothing" to "practical magic", depending on the animal, and there's a lot to keep track of.
Here below I'm linking a really great write-up from Modern Farmer because there's probably more to say about the different types of poop and what to do with them than I could fit in a Blab poast, and they've already done most of it for me.
If you are thinking about adding a certain type of livestock to your homestead, to improve your garden, to add a non-jewish food source, or simply for the challenge or companionship, it's good to consider all the pros and cons, but never forget that an added benefit (or maybe cost reducer) to the process is that all of them will produce the universe's greatest organic fertilizer when handled properly (or in some cases just tossed in because it's already perfect).
These animals will eat your garden scraps and leftovers your family doesn't consume, then turn around and poop it back out into something that will help you grow more, better fruits, vegetables, and herbs, for as long as you can keep them ticking.
Grow a plant - it could save your life someday, but remember that raising an animal also could. Doing both? Well, that's just peak performance, hoss. Reap the profit, as the foodpoors seethe.
https://modernfarmer.com/2015/05/get-a-load-of-our-manure-guide/