The excavation or drinking water substitute approach is helpful for soils which have been much too free to gather an intact core or clod, or for soils containing gravel. The two the intact clod and excavation procedures are explained in detail by Cresswell and Hamilton (2002). A soil microbiology lab https://karmic-justice77665.humor-blog.com/34785294/what-does-soil-investigation-report-bangladesh-mean