Final answer:
3. Caliche and hardpan are types of clay and cemented soil that are found in certain areas. Clay soil is made up of fine particles of silt that give it its plasticity when water is added.
Step-by-step explanation:
3. Caliche and hardpan are types of soil that are usually clays and cemented soil. Clay soil is made up of fine particles of silt that give it its plasticity when water is added.
Caliche soil is a type of clay soil that is cemented by calcium carbonate, while hardpan soil is a compacted layer of clay soil that is hardened by the accumulation of minerals.