Business / Agriculture / Soil: In the United States, about 70,000 kinds of soil are recognized in the nationwide system of classification. Each has a unique set of characteristics and a potential for use. These characteristics are important in designing a conservation plan to protect the soil from erosion if it is being cultivated. The Natural Resources Conservation Service is responsible for mapping the United States by soil type, through the Soil Survey Program.
Soil Adjective Synonyms: earth, loam, dirt, ground, turf, humus, clay
Soil Verb Synonyms: dirty, stain, begrime, muddy, smear, spot
Science / Geology / Expansive Clay (Expansive Soil): A clay soil that expands when water is added and contracts when it dries out. This volume change when in contact with buildings, roadways, or underground utilities can cause severe damage. MORE
Business / Agriculture / Soil Bank Program: A federal program of the late 1950s and early 1960s that paid farmers to retire land from production for 10 years: the predecessor to today’s Conservation Reserve Program. Some elements in the CRP, MORE