PLATE 2 
Photograph of plat 21 of the commercial fertilizer series in 1917 on University 
Farm (see Table IX). Marquis on the left and hybrid on the right. This plat had 
received potassium chlorid at the rate of 250 pounds per acre and acid phosphate 
at the rate of 500 pounds per acre in 1916, but no fertilizer in 1917. Note the uniform 
stand and freedom from lodging, in sharp contrast with the condition shown in Plate 
1. Note also the plump kernels of Marquis compared with the very shriveled kernels 
shown in Plate 1. The percentage of stem rust was 27 per cent on Marquis and 2 
per cent on the hybrid, and the yield of Marcpiis was 32.6 bushels per acre. The 
wheat in many of the plats fertilized with acid phosphate and potassium chlorid 
was like this. Hie kernels were plump and the yield was satisfactory in spite of the 
fact that on some of them the rust infection in previous years was from 50 to 85 per 
cent. 
