Context: A couple of friends and I may be getting ownership of a pretty sizable chunk of land for free, and we've decided that we want to use that land and the buildings on it to address problems like food insecurity, as my area has the highest rates in the country. I'm not totally sure exactly how big the plot is yet, but it can already grow enough food to be self sustainable according to the current owner. It was previously used as a sustainable living project and retreat.
Our plan is to grow as much food as we can on that space, ideally using only volunteers and donated materials so that we can give it to kitchens and shelters for free. With this in mind, what can we do to maximize the amount of food we can grow in that space? We don't want to sacrifice quality for quantity, but we want to feed as many people as we can for as long as we can so quantity is very important.
Ah shit, the stream I hang out in talks about this sort of thing occasionally, but I don't know enough to talk about it myself at length. They do have a textbook about soil in their resources here: https://twitchsbtv.files.wordpress.com/2020/07/global-soil-security-d.j.-field.pdf
It turns out there is a lot to keeping soil healthy, like... even tilling it/driving over it with heavy farming machinery can absolutely ruin long-term sustainability.
You could look into "companion planting" http://chemung.cce.cornell.edu/resources/companion-planting . There was a website we looked at that would send you seeds for companion crops if you agreed to report back to them to help to fill out the results of the various experiments. I am still looking for it. Here is another seed exchange: https://www.seedsavers.org/mission
I'll add more if I can think of / find anything