If I were limited to having and using just one garden tool (perish the thought) this 7-inch Rogue field hoe from Prohoe Tools would be it.
But, don't take my word for it. Read the reviews at Amazon.
This tool is versatile
. For tiny weeds just coming up, you can skim the surface and shave them off. I have never encountered a weed too big for this tool, including Lambs Quarters, Horse Tails, and Giant Ragweeds several feet taller than me. And, yes, 1-inch sapling trees can be chopped off at ground level in a single mighty stroke.
The blade is much thicker than most garden hoes, and has good metallurgy to take and keep a keen edge. I use a diamond sharpening stone to approach razor sharpness with mine. This hoe is available in handle lengths from 42 to 60 inches, in wood or fiberglass. When I purchased mine (many years ago) all they had was 60-inch wooden handles. I may purchase a spare with a fiberglass handle now that they are available. Prohoe also makes many garden tools in several styles. As time goes on I may collect a few, but this 7-inch field hoe is my hands-down favorite.