Casagrande as the water contents which exist under the following conditions: ● Liquid limit: The water content at which the soil has such a small shear strength that it flows to close a groove of standard width when jarred in a specified manner. ● Plastic limit: The water content at which the soil begins to crumble when rolled into threads of specified size. ● Shrinkage limit: The water content that is just enough to fill the pores.