Depends on what you are defining as “a smallish tree” … and the particular tree in question.
Some trees are more well-rooted than others.
Also depends on the size equipment you’re using. I have a Kubota
B2910 … 30 HP and maybe around 2500 lbs with the loader and box blade on.
I built my own grapple which was modeled on a W R Long RBG Root Rake Brush Grapple:
www.wrlonginc.com
The spacing between the gussets on the bottom tines is around 1 inch IIRC. (See picture at link above)
This allows me to drive it into brush and small saplings, wedging them in, and using the loader’s curl function to pry them out of the ground.
That works for the most part on small stuff.
Anything much bigger than that and I have to use the lower tines to rip the roots pretty good good to get them to pop out.
I have used this combo to remove trees up to 8” or more in diameter and probably 30’ tall … but they don’t just “pop out” by raising the loader.
Considerable work is involved, usually digging up the roots and then pushing the tree over after which the stump can be dug out.