an additonal use of that term is the name for a tree-planting crew
Hoedads Reforestation Cooperative based in Eugene, Oregon
they were active in oregon, washington and idaho and they were a progressive group, a co-operatively owned business.

they use a specialised tool (a hoedad) to dig the hole for the tree seedlings.

http://westbynorthwest.org/summerlate01/roshoedad.shtml
see hoe-dads

http://dead.net/cavenWeb/hulogosi/boac.html
(off topic i know, but an interesting topic, don't you think?)