The others are easy too, and even more novel. Kidding (about the novel part). Actually, they are old as sin, er, I mean, old as nature, because, you know, the

The others are easy too, and even more novel. Kidding (about the novel part). Actually, they are old as sin, er, I mean, old as nature, because, you know, they all borrow from or imitate nature, to a large extent, although there may some improvements or systematisations here and there. Check out Bill Mollison, Gabe Brown, Geoff Lawton, Jean-Martin Fortier, Richard Perkins, Aanandaa Farms, etc, in a bit of depth at least, first.