1.1 This test method covers the determination of the relative effectiveness of wood preservatives in round posts set in the ground in field plots. Two tests are described, one for small (3 to 5 in. (80 to 130 mm) in diameter) sapwood posts which is the This test method covers the determination of the relative effectiveness of wood preservatives in round posts set in the ground in field plots. Two tests shall be used, one for small sapwood posts which is the preferred test if major interest lies in te