Harvesting and screening Clay-soil
You will see how you can harvest and process clay-soil that is hard as rock. This is a good reason for harvesting your clay in the wet season
The "shake test"
The shake test can show you how much clay is in your soil in relation to other materials.
Testing for clay-soil
Doing these simple tests is the best way for finding out if your soil has enough clay in it to become a building material.