Progressive Agriculture 67 



and in the following pages we shall endeavor to 

 prove this as certain, not by theory but by 

 practical results. 



WINTER WHEAT AND TILLAGE 



Methods of tillage have very much more to do 

 with crop results in semi-humid sections than 

 weather conditions. In illustrating this fact, let 

 us call attention to certain pictures. Look at 

 Cuts No. 24 and 25 carefully. They represent 

 winter wheat tracts on 160 acres each, both 

 fields grown in the wet year of 1915 near Yuma, 

 Colorado on adjoining sections, with soil of the 

 same formation and both on land broken from the 

 prairie sod in 1914. The field illustrated in No. 

 24, made 39J bushels per acre, while No. 25 only 

 made 13 bushels per acre. Fifteen inches of rain 

 fell on both fields during April, May and June. 

 One field responded most beautifully because the 

 physical condition was such that nature could 

 come much nearer doing her best. Have you ever 

 seen such contrasts in adjoining fields and some- 

 times in different parts of the same field? Is it 

 possible to get around the wide difference in the 

 results of these two fields by saying it is only one 

 of many similar freaks? This is too ridiculous; 

 there is a cause for No. 24 and another cause for 

 No. 25, and apparently both had their definite 

 effects, therefore, the cause and effect are ex- 

 plained later on. 



Now give careful consideration to Cuts Nos. 

 26 and 27, to which is attached some interesting 

 history. These fields are closer related even than 



