Experiment 2. In another attempt to compare cutting and spray- 

 ing, two adjoining plats, each containing 24 square feet, were treated 

 simultaneously by spraying and cutting. On April 27, 187 plants 

 were " sprayed off " in one plat and 100 plants were cut off in another. 

 At the end of the season, October 6, just previous to the fourth treat- 

 ment, there were 31 plants to be cut off, and 42 plants to be " sprayed 

 off." Even tho the number of living plants in the two plats was 

 about the same at the end of the season, it must be said that the cut- 

 ting treatment was more satisfactory than spraying, due to the fact 

 that some injury occurred to the grass on the sprayed plat following 

 the spraying in August. In this test the work was necessarily done 

 at a certain stage of the growth of the plants regardless of the weather 

 conditions. Therefore, some injury occurred to the grass in the 

 sprayed plat in August because of dry weather and a dry soil. In 

 practice, such injury may be prevented by withholding spraying in 

 dry weather. 



Experiment 3. In another experiment, two adjoining plats, 3x6 

 feet and thickly infested with dandelions, were laid off on the lawn a 

 few feet west of Plat 3 of the larger experiments. One of these plats 

 was sprayed with twenty per ct. iron sulfate solution, and on the 

 same day the dandelions in the other plat were cut off just below the 

 crown. The two plats were treated six times during the season. The 

 first treatment was made on May 6. On May 24, the date of the 

 second treatment, 160 small dandelion plants were counted in the 

 sprayed area, and 45 in the cut-off area. Here, again, following the 

 first spraying, there was a quicker response of the sprayed dandelions 

 than of the plants cut off. The following tabular statement sum- 

 marizes the results of the various treatments: 



