Sort By:
  1. Analysis of experimental work with ground raw rock phosphate as a fertilizer /
    By: Waggaman, William H. (William Henry) - Gardiner, R. F. (Robert Franklin), - Wagner, Cary Richard,
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1918.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    View Book
  2. Cocoa by-products and their utilization as fertilizer materials /
    By: Walton, G. P. (George Pelham), - Gardiner, R. F. (Robert Franklin),
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1926.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    View Book