Hi greentwiga,
I hate to break it to you, but being a hunter -gatherer involves plenty of "work(ing) the land". Why else would anybody need these;
Wiki writes:
In archaeology and anthropology a digging stick is the term given to a variety of wooden implements used primarily by subsistence-based cultures to dig out underground food such as roots and tubers or burrowing animals and anthills. They may also have other uses in hunting, farming or general domestic tasks.
Digging for tubers is an important part of most hunter-gatherer lives. Such foods are an important source of carbohydrates and are often a calorific staple. That's where a good sturdy stick comes in handy.
These kinds of tool, with cross-over between foraging and farming lifestyles, are just part of the smooth transition between hunter-gatherer and farmer that you are so keen to ignore.
Mutate and Survive
"The Bible is like a person, and if you torture it long enough, you can get it to say almost anything you'd like it to say." -- Rev. Dr. Francis H. Wade