Agriculture (a term which encompasses farming and ranching) is the process of producing food, feed, fiber, fuel and other goods by the systematic raising of plants and animals. Agri is from Latin ager, meaning "a field", and culture is from Latin cultura, meaning "cultivation" in the strict sense of tillage of the soil. A literal reading of the English word yields: tillage of the soil of a field. In modern usage, the word agriculture covers all activities essential to food/feed/fiber production, including all techniques for raising and processing livestock. Agriculture is also short for the study of the practice of agriculture?more formally known as agricultural science.