Johnson Grass Control 



347 



a considerable stand was noted and a large number of rootstocks were 

 being- formed. At this time the land was irrigated and deeply plowed. 

 Shortage of labor and horse power prevented plowing immediately 

 after the removal of the grain but if the land could have been worked 

 at that time very much better results would have been obtained. As 

 the field appears in the fall of 1917 the Johnson grass is under control 

 but by no means eradicated. 



FIELD H ; CONTINUOUS DRY FALLOW 



This held was partially mowed and burned over in 1915. In March 

 and April, 1916, the land was plowed dry and the growth of Johnson 

 grass visibly retarded. Leakage from an irrigating ditch and a heavy 

 rain early in September encouraged the grass until it was very difficult 

 to control with a weeder. By the fall of 1916, while a visible improve- 

 ment had been made, the results obtained were far from what had 

 been hoped for. Late in February, 1917, the field was disked and partial- 



Fig. 10. — Field H, June, 1916; few Johnson gras.s plants appearing. 



ly plowed, and during the remainder of the season a weeder was used 

 quite frequently. In September the land was plowed dry preparatory to 

 seeding to grains later in the year. At the present time, November, 

 1917, the growth of Johnson grass is not very noticeable although there 



