Oklahoma is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Madill is located within North Marshall Division of Marshall County.
The shape of timber changes due to variations in moisture content (MC). In Scandinavia, the producers of timber normally dry timber to a moisture content of 18% MC. However, after the studs are built into the wall structure, for example, they may become distorted as a result of further drying in the structure.
1 You'll also find the moisture content of the wood, which is determined at the mill when the stamp is applied. Under the National Grading Rule, there are three moisture-content conditions:  S-GRN (surfaced green) means that the moisture content is above 19%.