THE AUTHOR'S PREFACE 



Some books have been written on Clover in the 

 United States, and as far as they go they serve a 

 good purpose. Many references and discussions 

 have also appeared in various bulletins and reports 

 issued by the experiment stations. These have 

 proved helpful not only in the States in which they 

 have been issued, but also in other States where the 

 conditions are similar. But no book or bulletin has 

 yet appeared which discusses the growth of clovers 

 as applicable to all parts of the United States and 

 Canada. Nor has any been issued which takes up 

 the subject in orderly and consecutive sequence. It 

 is evident, therefore, that there is not only room for 

 a book which will cover the ground with at least 

 measureable fulness, but also in concise and orderly 

 succession, but there is great need for it. It has 

 been the aim of the author to write such a book. 



Only those varieties of clover are discussed at 

 length which are possessed of economic value. The 

 treatment of the subjects is virtually the same as was 

 adopted in writing the book on "Grasses and How 

 to Grow Them." Some references are made to the 

 history, characteristics and distribution of each 

 variety. These are followed by discussions with ref- 



