Section D was reseeded with a mixture of equal parts of Kentucky 

 blue grass and red top grass seed which was carefully raked in with a 

 garden rake, especial attention being given to the bare spots in the turf. 



Section: A 



B 



i 



rf O 



9 .** 



DIAGRAM 2. ARRANGEMENT AND TREATMENT OF THE FOUR SECTIONS OF PLATS 2 

 AND 3 IN EXPERIMENT ON AFTER-TREATMENT OF LAWN SPRAYED WITH IRON 

 SULFATE SOLUTION. 



Results of the after-treatment measures were first evident forty 

 days later when the section treated with complete fertilizer was 

 found to be plainly outlined because of the distinctly larger size 

 and darker green color of the grass. The growth of the grass had 

 a tendency to cover up bare spots left by dead weeds. No notice- 

 able results, during this season, came from the use of the ground 

 limestone. In Section D, which was reseeded, there was a satis- 

 factory growth of young grass plants. However, it was about ten 

 weeks before the dead-weed scars in the turf were completely healed 

 over. 



THE EXPERIMENTS IN 1916. 



In the spring of this year, at the time of the first profuse blooming, 

 the sprayed plats were readily discernible at a distance by the small 

 number of dandelion blossoms as compared with the unsprayed 

 portion of the lawn. The stakes which originally marked the corners 

 of the plats were easily located by laying lines around the border 

 as indicated by the dandelion blossoms. Where the end lines crossed 

 the side lines the corner stakes were found imbedded in the turf. 



In order to measure the difference in number of dandelions and 

 express it in numerical terms, a strip ten feet wide was laid off along 

 the entire south boundary of the plats. This area was so located 

 as to include a strip five feet wide by 100 feet long on both the sprayed 



