Rhenania phosphate: Neess (19U9) , Schaeperclaus (1933), Wiesner (1937). 



Sodiiim nitrate: Hogan (19l;9) , King (19ii3)> Meehean (1939) > Meehean and 

 Marzulli (19U5), Schaeperclaus (1933) > Swingle and Smith (1939a, 19iil, 

 1950) o 



Superphosphate: Brown (195l), Davis and Wiebe (1930), Hasler and 

 Einsele (I9ii8), Hogan (1933), Juday et al. (1938), Lawson (1937), 

 Meehean (1939), Neess (19U9), Schaeperclaus (1933), Smith and 

 Swindle (I9I4O, 19U1, 19U3) , Surber (19hS, 19U7), Swingle (19U7), 

 Swingle and Smith (1939b), Wiebe (1929, 193h) , Wiesner (1937). 



Thomas meal: Schaeperclaus (1933), WLesner (1937). 



Organic 



Aquatic plants; Hasler and Einsele (I9U8), Meehean (1935)., Schaeperclaus 

 (1933), Swingle and Smith (1950) , Vfi.esner (1937) o 



Cottonseed meal: Hogan (1933), Leach (1936), Meehean (1933, 1935, 1939), 

 Meehean and Marzulli (19U5), Neess (I9U9), Smith and Swingle (I9I0, 

 19li3), Surber (19i45, 19^7), Swingle (19^7), Wiebe (193u) 



Fish meal: Leim (1931), Sch as^erclaus (1933), Smith (1931, 1933, 193Ub, 

 193iic, 1936, 1938). 



Hays Meehean and Marzulli (19U5) , Surber (19ii5, 19i;7) . 



Manure: Davis and Wiebe (1930), Hiyama (1950), Hora (1950), Leach 

 (1936), Meehean (1933, 1939), Nelson (19^1), Schaeperclaus (1933), 

 Shelubsky (1950), Surber (19U5, 19U7) , Swingle (19ii7) , Wiebe (1929), 

 mesner (1937). 



Peanut meals Smith and Swingle (19i;3). 



Poultry laying mash: Smith and Swingle (I9U0, 19U3) » 



Sea Mussels: Smith (1930, 1931). 



Shrimp bran: Vftebe (1929), 



Soybean meal: Davis and Wiebe (1930), Juday et al. (1938), Leach 

 (1936), Meehean (1933), Neess (19U9) , Smith and Swingle (19^3), 

 Surber (19U5), W^es (I9U6), Wiebe (1929). 



Miscellaneous: Embody (1921), Hora (1950), Lawson (1937), Leach 

 (1936), Meehean (1939), Prince and Bear (19ii3), Schaeperclaus 

 (1933), Smith (1933), Swingle (19^7). 



I4O 



