Vegan gardening?

I'm distracted, thinking about planting. I've got heirloom tomatoes and leeks and mung beans sprouting in the windowsill... But as a former sheep farmer, I just hit this website about 'manure-free' (or animal-free vegan permaculture) and was fascinated with the concept of "stock free farming" - meaning, no manure. Of course I know about sea kelp and compost, but no manure? Hmmm

If you live in the UK, The Welsh College of Horticulture runs courses on stockfree organic farming; VON provides bursaries for animal-free farming. (tmi: I once did some graduate courses in Aberystwyth - and loved it!). Read more at stockfreeorganic.net.