Manures and Fertilizers 



BY H. J. WHEELER, PH.D., D.Sc. 



Formerly Director of the Rhode Island Experiment Station 

 (Rural Text-book Series) 



Illustrated. Clpth, I2mo, $1.60 



The clear and unusually full discussion of the practical utilization of 

 manures and fertilizers of all kinds, and of their relations to the plant and 

 to the soil, makes this book not only an excellent text for college students, 

 but also one which will be generally welcomed by a]l up-to-date agricul- 

 turists. All the animal manures, litter and waste nitrogenous materials 

 of every sort are discussed. A helpful feature for the student is the 

 extended treatment of the availability of organic nitrogen and of the or- 

 ganisms contained in barnyard manure which give rise to the various fer- 

 mentations taking place therein. The well-known and also the new, 

 nitrogenous manures, such as calcium cyanamid and calcium nitrate, are 

 considered in detail. The chapters devoted to the potash salts, phos- 

 phates, lime, magnesia, soda, gypsum, iron and manganese are excep- 

 tionally complete, and chlorin, sulfur, silica, carbon disulfid, toluene and 

 other substances exerting catalytic and other effects are described. Much 

 of the material in this book, which will be new to students and other 

 readers, has suggested itself to the author in the course of twenty-two 

 years of continuous research. 



Farm Management 



BY G. F. WARREN 



(Rural Text-book Series) 



Illustrated. i2mo, $1.75 



This book teaches the necessity of efficient farm organization and 

 management so as to secure the farmer the best crops at the lowest price. 

 Professor Warren shows the way to such efficiency and thoroughly dis- 

 cusses the more important phases of farm management from the selection 

 and purchase of the farm to the marketing of its products. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



