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.
Soils are a composition of mineral particles 45% , organic matter 5% , air 25% , and water 25% . Mineral Particles: Mineral particles are the largest ingredient and make up approx 45% of soils. They are the original rock that got broken down by weathering and erosion to form the basis of soil.oil is composed of both organic and inorganic matter, and it is essential for life on earth to exist. The soil type that i have studied is brown earths. Brown earths are the most common soil type in Ireland and are very fertile.