T 



to remove. Accordingly, care should be taken to avoid getting 

 any of the spray on one's clothing or on sidewalks, building founda- 

 tions, monuments, curbstones and the like. Even the dragging of 

 the wet hose across stone or cement sidewalks will stain them. 

 In our experiments, when working around sidewalks and buildings, 

 we have found it convenient to use a screen made of cloth tacked 

 over a light wooden frame (3 by 6 feet). A helper is required to hold 

 the screen in position and move it from place to place as needed. 

 After using, the sprayer should be washed out thoroly with 

 clean water to prevent serious rusting. The working parts of the 

 spray pump should be kept well oiled. 



AFTER-TREATMENT MEASURES. 



Our experiments and experience demonstrate that it is necessary 

 to supplement the spraying operations with at least two after- 

 treatment measures, namely, fertilization and reseeding. 



FERTILIZATION. 



The fertilization of lawns is essential in order to produce a thrifty 

 growth of grass and dense turf for a protection against the encroach- 

 ment of weeds. In our experiments, five methods of fertilization, 

 in the form of surface applications, were tested in conjunction with 

 spraying. Briefly, they are as follows: 



(1) Spring and fall applications of bonemeal at the rate of 1000 

 pounds per acre, the fall application giving the best results. 



(2) The application of slaked lime at the rate of 1000 pounds 

 per acre. No noticeable response was secured from this treatment. 



(3) The application of nitrate of soda at the rate of 100 pounds 

 per acre in the spring after active growth had begun, arid again in 

 summer. This gave good results in the form of increased growth 

 of the grass. 



(4) The application of a complete commercial fertilizer in the 

 fall. 



(5) The use of well-rotted stable manure applied in the fall, 

 and the coarse material raked off the following spring. 



The results seem to indicate rather conclusively that the average 

 lawn will require some form of fertilization to quicken grass growth 

 and heal the turf after the dandelions and other weeds have been 



