THE RURAL SCIENCE SERIES 
HE FERTILITY OF THE LAND: A 
Summary Sketch of the Relationship of 
Farm-Practice to the Maintaining and In- 
creasing of the Productivity of the Soil. 
By I. P ROBERTS, Director of the Gollege of Agri- 
culture, Cornell University. 
SECOND EDITION—432 PACES—46 ILLUSTRATIONS—$1.25 
This work, written by one who has been termed 
“the wisest farmer in America,” takes up the treat- 
ment of the soil from the standpoint of the farmer 
rather than that of the scientist. It embodies the 
results of years of careful experimentation and obser- 
vation along practical lines, and will be found help- 
ful and inspiring to a marked degree. No other one 
book could be so heartily recommended to the pro- 
gressive farmer, on subjects of vital interest to him, 
as this fresh and interesting series of talks—for Pro- 
fessor Roberts seems to be personally addressing the 
reader. 
THE FERTILITY OF THE LAND includes A Chat with the Young 
Farmer ; Inventory of the Land ; Evolution of the Plow (fully illus- 
trated); The Means and Philosophy of Tilling the Land (telling how 
and why we should plow, harrow, etc.); Conserving Moisture ; Irri- 
gation and Drainage ; Manures (in four unique, illustrated chap- 
ters); Nitrogen; Potash and Phosphoric Acid; Lime and other 
dressings ; Commercial Fertilizers ; The Use of Clovers, Fallows 
and Rotations ; Appendix. : 
“In short, the book will be found helpful to the farmer, in that it will 
enable him to go through the routine of his everyday work with intelli- 
gence, and, therefore, with skill and the assurance of wider success.”— 
Garden and Forest. 
