In the second two photos, Oren Champ stands writing on a piece of paper while he stands next to a Dumpy Level used for surveying soil in conservation practices and an earthmover with a an unidentified driver on it..
Don Nelson is on the left, Deane Thornton is standing in the background, and Doug Cling stands with hands on hips. The man bending over is Don Jarvis and the fifth man is unidentified