Research in Brief

• Published in: Journal of extension Vol. 38; no. 4
• Main Authors: Neufeld, Jerry, Davison, Jay
• Format: Journal Article
• Language: English
• Published: Eugene Extension Journal, Inc 01.08.2000
• ISSN: 1077-5315; 1077-5315

Extension professionals involved in applied agronomic research projects commonly use analytical laboratories for soil sample analysis to determine the nutrient status of agricultural soils. Additionally, many Cooperative Extension clientele and program collaborators use soil testing laboratories for the same purpose. Determination of soil nutrient status is important to maximize production and returns as well as to minimize negative impacts to the environment. There is, however, a great deal of variability associated with the analytical results received from many soil testing laboratories. Variability has the potential to negatively impact applied research projects and recommendations made to Cooperative Extension clientele. In 1995 and 1996, a study was conducted to quantify and illustrate the variability problem and to develop a set of recommendations that can be used to assist Cooperative Extension professionals and program clientele in selecting a quality soils testing laboratory. Our results indicate there is a sufficient amount of variability in results received from soil testing laboratories to make it worthwhile to research analytical soil testing laboratories before selecting one for use.