low stress training. basicly pulling a limb away and tieing it so that the under neath branches get light. theres probably a link with a diagram to show lst and super cropping hope this helps. go down to the search and click go and type it in you should be able to find what your lookin for.
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Here's a link to a decent post about super-cropping - there may be better descriptions, but this is how I have always understood it. (Note, I don't think the original posters description was correct, so I perma-linked a better description in a post below the original...) There is a video, too.