CAMPBELL'S SOIL CULTURE MANUAL 77 



Summer Culture has been confounded with Summer 

 Fallow, the methods are so different that any conclusion 

 that may have been derived from Summer Fallow exper- 

 iments by our agricultural experts would not apply to 

 Summer Culture; therefore, many of the objections held 

 up or against Summer Fallow do not apply at all to Sum- 

 mer Culture, The most prominent is the rotation results. 



EXPERIMENTS IN ROTATION. 



For illustration, take the eight year rotation at the 

 South Dakota Experiment Station under the direction 

 of E. C. Chilcott up to 1906. 



We would first call attention to some of the state- 

 ments made in the bulletin with reference to the handling 

 of the ground. Referring to summer fallow, they say all 

 summer fallowed plats are plowed in July before any 

 weeds have ripened their seeds, and are plowed again 

 with the other plats in the fall. They are given no other 

 cultivation during the season. 



Referring to the corn plats they say corn is drilled in 

 rows one way. It is given good clean cultivation with 

 the drag, weeder and cultivator, each in its proper season. 

 Referring to the preparation of the ground for the various 

 plats, wheat, oats, and barley, they say. "The plats are 

 plowed in the fall, usually in September, crosswise of the 

 series. This necessarily involves plowing the corn ground 

 and potato ground. We have found by other experi- 

 ments that where the crop has been properly cultivated 

 and kept clean there is on the average very little difference 

 to be seen in the following crop whether the corn ground 

 is plowed or whether it is drilled in without plowing. The 

 ground is plowed at depths varying in different years 

 from five to seven inches. As early as possible the in 

 spring the ground is harrowed twice with an ordinary 

 steel harrow." 



