Soils, Bureau of, United States De- 

 partment of Agriculture, 173 



"Soils and Men," by Curtis Fletcher 

 Marbut, 41 



Soils -.Their Formation, Properties, 

 Composition, and Relation to Cli- 

 mate and Plant Growth, by Dr. 

 E. W. Hilgard, 47 



South America, 23, 172 



South Pasadena Review, 48 



Stinking earthworm, 24 



Stockbridge, Dr. Horace Edward, 52 



Stockli, A., 157, 167 



Subsoil, 48, 49, 74; chemical ele- 

 ments, 49; plowing, 74 



Sudan, 43, 53 



Sun power, 171, 172 



Svensk Skogsvardsfor. Tidskr., 167 



Tana Lake, 44 



Theory and Practice in the Use of 



Fertilizers, by Dr. Firman E. 



Bear, 40 

 To Hold This Soil, by Russell Lord, 



171 

 Topsoil 13, 22, 32, 35, 42, 48, 49, 50, 



52, 173, 177-179; mass-production 



of, 42, 57, 175, 177, 179 

 Transactions of the Geological 



Society, London, 166 



United States, 20, 23, 56, 8V 

 United States Department of Agri- 

 culture, 20, 41, 49, 174; Bureau of 

 Soils, 173; Experiment Station 

 Record, 43, 51; Miscellaneous 

 Publications, 171, 174; Yearbook 

 for 1938, 41 ; Department of Agri- 

 culture Yearbook, 20 

 University of California, 47 

 University of Wisconsin, 49 

 Utah Agricutural College, 77 



Vegetable Mould, 38, 177 



Weir, Dr. Wilbur Walter, 48 

 WGY Farm Forum, 41 

 White, Gilbert, 155 

 White Nile, the, 43 

 Whitney, Milton, 173 

 Wiley, Dr. Harvey W., 30 

 Wolff, 52 

 Wolney, 47 



Yearbook of the United States De- 

 partment of Agriculture for 1938, 

 41 



Yearbook of the United States De- 

 partment of Agriculture Statistics, 

 20 



