Typically, slender-walled tube samplers and numerous piston samplers are used to collect undisturbed soil specimen. The diameter of your undisturbed soil sample is around a hundred mm and ranges from 150mm to 200mm for rocks. When samples are collected, they need to be despatched to some Qualified laboratory for analysis. https://finnbbyut.post-blogs.com/52868323/soil-analysis-and-testing-bd-things-to-know-before-you-buy