The excavation or h2o substitute strategy is beneficial for soils which might be far too free to collect an intact Main or clod, or for soils made up of gravel. Both of those the intact clod and excavation solutions are explained in detail by Cresswell and Hamilton (2002). Plastic Device: https://musical-authenticity78776.bligblogging.com/36634955/detailed-notes-on-soil-testing-and-investigation-bd