Lau

Lau

Large jars were filled with soil mixtures and water; shaked thoroughly; and allowed to sit overnight so that the particles in the mixtures could settle. The heavy partilces, sand and gravel, settled to the bottom of the jar first, and the fine particles of clay and silt gradually settled above. Separating the content of the soil and letting it settle provided a way to measure and calculate the clay to aggregate ratio of the soil mixtures.