Jan read our post about Essential Gardening Tools and has added another from Spain.
This tool has a sharp blade, and they come in varying widths and lengths, depending on the soil type being tilled. They are used extensively in Africa, where they are called Jembes.
The mattock in the picture is reversible, with two tines at the other side. The tines are used in the same way as a garden fork.
The mattock and jembe produce a very uneven depth of soil which restricts root growth and leads to uneven plant growth.
Thank you Jan for sending this photo of the mattock, a Spanish gardening tool.