Gidday. I've been at the PRI, Zaytuna Farm for just over 3 weeks now. My course started yesterday, and my official WWOOFing (willing workers on organic farms) days are over, for now. Just being here is a learning curve in itself. As my shallow understanding of permaculture goes, one of the main principles is having everything rubbing of eachother (in a positive way) to utilize the maximum potential of energy from ones resources. An example of this might be fencing chickens in a squared off piece of land intended for sustainable crop growth, to just be themselves. By just being themselves they will be weeding (they love to peck, dig up and scratch the ground) fertilize the soil (by shitting) and producing eggs (there are a few more benefits from them, but you get the idea). In 2 weeks the soil will be complex and rich in a diverse range of micro-organsims (the main beneficial ones being mycelium, aerobic bacteria. Some one just told me those now). This is recognizable as a rich, decent soil even to the untrained eye, or just the way soil should be. People from diverse walks of life from all around the globe are here. The course itself is a truck load of info (I need to pace myself). I want to give more examples than the one above, but maybe that's a good start.