Homemade Hoe
A nice, potentially free hoe that works as well as a store bought one.
Acquire Materials
You are going to need a piece of a leaf spring around 4 inches long. To cut it, I used an angle grinder with an abrasive wheel, but a torch or plasma cutter would be better. You will need a handle, and I used a 1"/1"/2' square steel tube (again, cut with angle grinder).
Tools
If you use the same design as I did, you will need a welder, cutting tool, and a bench grinder (optional, especially if you have an angle grinder).
Assemble
Weld the hoe with the back of the blade piece level with the back of the tube. If you wanted to, you could cut out a larger section of spring and make other parts on the back (root cutters, etc.). Sharpening makes it function a little better, but it doesn't really need it. Leaf spring is fairly strong, but the components don't really matter.