246 MANURES FOR TREES 



unhealthy trees, it acts with beneficial eflfects." 

 (7) A 10 per cent, solution of iron sulphate 

 destroys certain fungi that attack vines. (8) Iron 

 sulphate prevents chlorosis in trees, shrubs, etc. 

 (9) Iron sulphate destroys the spores of fungi (the 

 foes of vegetation) present in dung ; and it also 

 fixes the ammonia, preventing its evaporation or 

 loss. (10) Iron sulphate, as a top-dressing, destroys 

 moss in orchards. 



The author's investigations on iron sulphate as a 

 manure have been confirmed by a large number of 

 workers in various parts of the world.^ 



Special Manures for various trees and shrubs 

 have already been given in the last two chapters 

 of this book, and the results are based on experi- 

 ments and determinations made in the orchard, 

 garden and laboratory. We have not described 

 the modes of culture of each fruit or other tree, 

 as it would have been entirely outside the subject — 

 "Manures for Fruit and Other Trees." 



In concluding this chapter on manures, it may 

 be stated that it is a poUcy which pays for fruit 

 growers and gardeners to help nature by adding 



1 For further information concerning the use of iron sulphate 

 as a manure, see the author's books : A Treatise on Manures, 

 Special Manures for Oarden Crops, Manures arid their Uses, and 

 The Diseases of Crops. 



