192 CAMPBELL'S SOIL CULTURE MANUAL 



culture, and how it will not only greatly increase the av- 

 erage yield, but make a failure, so far as drouth is con- 

 cerned, an impossibility, a larger acreage will be thus 

 treated. 



This part of the Campbell system of soil sulture if 

 carried out to the letter in the winter wheat sections, 

 especially where the crop will ripen in time to finish cut- 

 ting in June, will certainly revolutionize wheat growing, 

 not only in the more arid sections, but in the more humid 

 sections. 



The plan should be in case of old land, to summer 

 till about one-third of the land thoroughly each year until 

 the entire- field has been gone over, then follow closely 

 the following plan: As soon as the crop is harvested, 

 double disk the field; better still to follow the harvester 

 with the disk; harrow or otherwise cultivate after each 

 subsequent rain, until as near as it may be possible to the 

 middle of July; then plow and follow same plan as is laid 

 down for summer culture, and seed again at proper time. 



This line of work if carefully followed after one season's 

 thorough summer culture will result in further big crops, 

 because the disking, plowing and other cultivation during 

 July and August and early September, gives opportunity 

 for further development of plant elements as well as stor- 

 age of miosture for the next crop. 



The experience on the Pomeroy model farm at Hill 

 City, Kansas, for seven years, 1900 to 1906 inclusive, at 

 the Burlington farm at Holdrege, Nebraska, from 1903 to 

 1906, inclusive, and many other points in western Kansas 

 and Nebraska, and eastern Colorado, and the Panhandle of 

 Texas, are certainly evidence that our ideas drawn from 

 twenty-seven years of experience and observation, repre- 

 sent something more than theory. They at laast carry 



