The excavation or water substitute process is beneficial for soils which have been far too free to collect an intact core or clod, or for soils that contains gravel. The two the intact clod and excavation strategies are explained in detail by Cresswell and Hamilton (2002). Plastic Unit: A soil https://whispers-in-the-dark99988.digitollblog.com/33131422/detailed-notes-on-soil-investigation-companies-bd