348 COMMON WEEDS 



of i ton per acre. This is rather slower in its action 

 than lime, and in many cases it will be considered 

 objectionable, because it encourages the growth of 

 clovers. The dressing may be necessary for two 

 consecutive years. Spring is the best time, especially 

 when showery weather prevails." 



The following note is of considerable interest : 



" A Doncaster correspondent inquires how ' Fairy 

 Rings ' may be destroyed on grass land. It may be 

 remarked that in Dr. Gilbert's experience Fairy Rings 

 grow chiefly on impoverished soil. Infested grass land 

 therefore, which is at all poor in character, should be 

 liberally manured, and when the grasses have become 

 more vigorous the Fairy Rings will probably disappear. 

 In the case of lawns and special grass plots i ton of 

 slaked lime might be applied in winter, 3 to 4 cwt. of 

 superphosphate, 3 cwt. kainit, and J cwt. nitrate of 

 soda in early spring, and i to 2 cwt. superphosphate 

 and i cwt. nitrate of soda in late spring all per acre. 

 For pastures, 4 cwt. superphosphate and 2 cwt. kainit 

 may be applied in early spring, and J cwt. nitrate of 

 soda early in April." 1 



In the case of lawns on soils containing lime or 

 of a damp character, sulphate of ammonia may be 

 substituted for the nitrate of soda with advantage. 



Mr. G. H. Robinson (Assistant Vegetable Pathologist, 

 Victoria) found that the fairy ring puff-ball Lycoperdon 

 polymorphum Vitt. could be eradicated by watering with 

 a solution of sulphate of iron. In his experiments 2 

 an infested bowling-green was divided into plots of 

 60 square yards, 8 Ib. of sulphate of iron in 30 

 gallons of water being put on that area with zinc 

 watering-cans. The green was well watered over 



1 Jour. Bd. Agric., August 1907, p. 296. 



2 Agricultural Gazette, New South Wales, August 1907. 



