Johnson Grass Coxtimi, 



345 



irrigating- wattT were destroyed. After the corn got too large to culti- 

 vate, a very little hand hoeing' removed all traces of Johns jn grass. 



i-ii;i.i) 1': i.\ii;.\si\-i-: cl-l'iu'ation, corn and cotton 

 This tiehl, having heen mowed and burned over in the fall of 1^15, 

 was plowed in A])ril the following year. Plowing, levelling and culti- 

 vating: necessitated irrig:ations late in March, early in June, and early 



Fig. 8. — Johnson grass on Fields G and H, July, 1915. 



in July. Since the land was held moist during this part of the season 

 great numbers of Johnson grass plants came up, and in the absence of 

 a suitable weeder. had to be kept in check by means of a cultivator. In 

 the middle of July, 1916, corn was planted and for a short time consid- 



