Petersburg, West Virginia. Petersburg is a city in Grant County, West Virginia, USA. The population was 2,467 at the 2010 census. It is the county seat of Grant County. Contents.
The particles that make up soil are categorized into three groups by size: sand, silt, and clay. Sand particles are the largest and clay particles the smallest. Although a soil could be all sand, all clay, or all silt, that's rare. Instead most soils are a combination of the three.
Soil structure is the shape that the soil takes based on its physical and chemical. properties. Each individual unit of soil structure is called a ped. Take a sample of. undisturbed soil in your hand (either from the pit or from the shovel or auger). Look. closely at the soil in your hand and examine its structure.