STABLE AND. BARNYARD MANURE 89 
ADDITIONAL READING 
““The Fertility of the Land.’’ By Isaac Phillips Roberts. 
‘Making Best Use of Manure.’’ O. M. Hayes. The Ohio 
Farmer. March 8, 1913. 
‘Handling Soil for Production.’’ Twentieth Century Farmer. 
March 15, 1913. 
“Soils and Fertilizers.’? Harry Snyder, B. 8. 
