The Seeding and Care of Golf Courses 



tially to the fact that the soil there is already acid, and that 

 the applications were continued through a period of years. 

 At the Wooster,Ohio, Experiment Station, tests were made 

 to ascertain whether clover and crab-grass could be exter- 

 minated in this manner. The soil in that section is deficient 

 in lime, and so not unlike that at the Rhode Island Station. 

 For ten consecutive years the application was made, before 

 any particularly unfavorable effect on these grasses was 

 noticeable. If, on soil naturally acid, it requires ten years 

 for sulphate of ammonia to make any noticeable impres- 

 sion, it would seem impracticable to use it on neutral soil or 

 soil supplied with lime, with the hope of driving out weeds 

 and clover. 



BONE-MEAL 



jrjTT' HiLE bone-meal is an organic material, it is not a 

 rf^ humus-former, and is best considered as a chemical 

 fertilizer. It is cheap and popular, is in no way injurious to 

 the turf or soil and can be applied at any season. Its use on 

 the green should be avoided if White Clover is present, as 

 its lime content stimulates that undesirable plant. The ni- 

 trogen and phosphorus elements of the bone are more avail- 

 able if it is steamed. For top-dressing, bone-meal should be 

 finely ground. Best results are produced by winter applica- 

 tion, as the early spring growth is thus stimulated. On the 

 green use about two pounds to one hundred square feet. 



[37 J 



