Field covering is a term used to describe the use of tarps, or tarpaulins, to cover an area of land. Tarp, with four letters, is a common abbreviation for tarpaulin, which is a large sheet of waterproof material used to cover an area of land, such as a field, to protect it from the elements. Tarps are often used to protect crops from rain, wind, and other weather conditions. They can also be used to cover sports fields, playgrounds, and other outdoor areas.