As drinking water sampling for Perfluorooctanesulfonate (PFOS) and Perfluorooctanoic acid (PFOA) continues, the Air Force Civil Engineer Center has expanded the current sampling area and is asking for ...

Recent years have seen an increasing interest in probability sampling, and some proponents of the method have urged its use in public opinion surveys. This article reports on a comparative study of ...

Manure has always been a valuable input to agricultural soils in our region. The value of manure has increased significantly in the last few years as the cost of commercial fertilizers has climbed to ...

In geographical and related research uncertainty and error have arisen in the selection, application, and interpretation of designs in plane sampling largely through ...