Pasture Health, Soil Should We Test Soils For Molybdenum, Cobalt, and Selenium? Mark Kopecky January 19, 2015 From time to time I get questions from farmers asking how they can have their soil samples tested for molybdenum, cobalt, or selenium. Each of these elements, along with many others that aren’t testAll the grazing management tips you need Subscribe to read this article and over 2,500 more! Subscribe today! If you're already a subscriber, log in here.