http://www.motherearthnews.com...
I ran across this in the Mother Earth News newsletter. Some of the tools he mentions: black silege tarps, a power harrow, a wheel hoe, I am not familiar with, and Eliot Coleman's colinear hoe, I knew once, but have since forgot. Not often is there new information about how to weed a garden bed--and keep it weeded until the crop is harvested.