Preface. 



i 



This is the tenth edition of Food for Plants and, after 



o repeated and extended revisions, the work has come to have 



a standard place in our American farm literature. It now 



includes results of original investigations and experiments 



on Highlands Experimental Farms. 



The main purpose of these experiments has been to de- 

 monstrate the value of Nitrate of Soda in the scheme of ra- 

 tional fertilization on a practical scale. The experiments are 

 being continued and results will be published in succeeding 

 w editions of this work. The present investigations cover more 



2 particularly the question of amount of Nitrate and other 



00 



. chemicals to be employed, as well as the question of time of 



3 application for most profitable results. 



These experiments are being inaugurated along the lines 

 pursued by European investigators, and we expect to be able 

 to publish additional data of value in our next edition of this 

 work. 



WILLIAM S. MYERS. 



New York, October, 1907. 



