Yes, just push a spade into the ground and wiggle the handle enough to see the dirt below... you can also learn the Texture of the soil by grabbing a small amount into your hand...
So you have rain all winter, but the grass doesn't grow much... Does moss grow well during your winter??? Do you irrigate during the growing season,,, if so ,,, How much???
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage,,, I wonder what does...