I am looking at helping a friend do something permaculture like with some very steeply sloped land with trees, hills and valleys - not smooth, think lumpy. There is lots of trees so I don't know how much can be done with big machinery either, unless trees were removed.
Does anyone have books, links or videos to recommend that might fit this situation?
As a general reference for gardening in temperate forests: Edible Forest Gardens (in two volumes) by Dave Jacke with Eric Toensmeier is a great book. It applies best to zone 6 but is valid from around 4-8 in all forested areas. It concentrates mainly on the plant side of things, giving only a few indications on water flow control and saying almost nothing about animal husbandry. I think this is simply because the books were long enough already.