s 
bexletix 901. r. s. depabtmext of AGEicrLirEE. 
offers oi^ortunitv for several direct comparisons of the results of 
these methods. 
It 1, 
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L- b 
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l_^ u 
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la i |: I 
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A? A? FALLOW SERIES 
Fig. 1. — Diagram of the experimental plats in the main field at Edgelev. N. Dak., 
showing the location of the crop rotations with reference to each other. 
The location of the rotations with reference to each other is 
shown in figure 1. which is a plat sheet of the main field. Each rota- 
tion is designated by a number and each plat in the rotation by a 
