That's why I started composting the meat. And fish carcasses. I'm not a believer in not fertilizing my raised beds or containers, because honestly, while it might be more sustainable, it just doesn't grow as good of plants. I don't have the luxury of fertile soil. Nitrogen comes in many different sources, but most of them are pretty mobile. So they deplete the fastest. No till helps, but there's no substitute for a good 2-tier feeding plan. If you were to combine your compost, with an every week manure tea - and by "manure", I also mean urine, if that's what you have - you'll probably do well. But it's gonna be a lot of work.
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I made my own fish fertilizer a couple years back. I made so much, it'll probably last me for 10 years. But I live next to the ocean. I get seaweed (sargassum), also. I also had rabbits for about 4 years, so I have rabbit poo. So it's like this: Rabbit poo as the go-to, fish fert every other week, or so, Compost tea at the beginning of the season to get everything rock 'n' rolling, and to combat the torrential downpours, a dry fertilizer. Alaska fish pellets, Dr Earth, whatever. I could probably roll my own, but it gets to be a lot of work.