It's not a cart. There's no room in it to put anything. There's only 1 shaft. I agree with tonepad reply #4 it's a mowing machine. It's low to the ground, lower on the far side. There's a longer bit sticking out at the far side which looks like the blade. Does the driver have his left hand on a lever/brake attached to the wheel? Seems to be cut grass in foreground.
I used to help oil one like it before start of haymaking when I was a child. The blade had thick, heavy teeth. When it's working the driver was sitting near to ground.
Edit. I've just looked at a similar photo you posted under "Tom O'Loughlin Ireland 1920s". I've added a comment to that.
I may be wrong about the driver's left hand holding a lever on the wheel in this one, unless that was the brake. There was a control for the blade on the other side.
