TILLAGE. 



77 



occur they should be eradicated. For five 

 years Prof. G. E. Morrow conducted a series of 

 experiments at the Illinois experiment station 

 upon the influence of frequency of cultivation 

 upon the corn crop. The average results for 

 the five years ending 1893 are as follows:* 



Kind of cultivation. Yield in bushels. 



Not cultivated; scraped with hoe (two plats) 68.3 



Shallow, ordinarily frequent 70.3 



Deep, ordinarily frequent 66.7 



Shallow, frequent .- 72.8 



Deep, frequent 64.5 



The general results thus favor frequent shal- 

 low cultivation, though the increased yield will 

 warrant the employment of but little* extra 

 time over that of ordinary frequency. 



At Purdue University we ordinarily plan for 

 at least five cultivations during the season. 



At the Kansas experiment station quite a 

 number of plats of corn have been submitted 

 to frequent cultivation tests. The average re- 

 sults of three years' trials, as given by Prof, C. 

 C. Georgeson, are as follows.f 



* Bulletin No. 31, March, 1894, Illinois agricultural experi- 

 ment station, p. 355. 



t Bulletin 45, December, 1893, Kansas agricultural experi- 

 ment station, p. 131. 



