The Online Books Page

Books by H. P. Johnson:

Books in the extended shelves:

• Johnson, H. P. (Howard P.): Effect of channel straightening on the movement of flood waves on Boyer River (Iowa State Water Resources Research Institute, Iowa State University, 1970), also by Surendera Kumar, Iowa Agriculture and Home Economics Experiment Station, United States. Office of Water Resources Research, and Iowa State Water Resources Research Institute (page images at HathiTrust)
• Johnson, H. P. (Howard P.): Movement of herbicides in soil by mass flow : completion report (Iowa State Water Resources Research Institute, Iowa State University, 1975), also by James L. Baker (page images at HathiTrust)
• Johnson, H. P. (Howard P.): Yield response of corn in a planosol soil to subsurface drainage with variable tile spacings (Agricultural and Home Economics Experiment Station, Iowa State University of Science and Technology, 1965), also by C. E. Beer and W. D. Shrader (page images at HathiTrust)

Find more by H. P. Johnson at your library, or elsewhere.