Books by P. R. Johnson:
Books in the extended shelves:
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Johnson, P. R. (Paul Rufus), 1903-: Cotton variety experiments at substation no.2, Troup (Texas Agricultural Experiment Station, 1930), also by W. S. Hotchkiss (page images at HathiTrust)- Johnson, P. R. (Paul Rufus), 1903-: The effect of time and rate of application of nitrate of soda on the yield of cotton (Texas Agricultural Experiment Station, 1934), also by E. B. Reynolds, B. C. Langley, and Texas Agricultural Experiment Station (page images at HathiTrust)
- Johnson, P. R. (Paul Rufus), 1903-: Hairy vetch, bur clover and oats as soil-building crops for cotton and corn in Texas (Texas Agricultural Experiment Station, 1950), also by E. B. Reynolds, H. F. Morris, and Texas Agricultural Experiment Station (page images at HathiTrust)
- Johnson, P. R. (Paul Rufus), 1903-: Texas bullnettle and its control (Texas Agricultural Experiment Station, 1966) (page images at HathiTrust)
- Johnson, P. R. (Paul Rufus), 1903-: The tung-oil tree in Texas (Texas Agricultural Experiment Station, 1935), also by S. H. Yarnell and Texas Agricultural Experiment Station (page images at HathiTrust)
Find more by P. R. Johnson at your library, or elsewhere.