Weeding

Ray has documented an experiment where he weeded one section of his garden and let the other go natural.  So what do you think?  Is weeding just for show or does it help your plants grow better?

This link will start his video at the point where he shows his experiment.
http://youtu.be/Zl_zxmqQ1EU?t=8m48s

Or you can watch the entire video about compost tea nutrient extraction which is different from brewing compost tea for microorganisms.