FARM MANURE 



533 



The long tests conducted by the Pennsylvania and Ohio ex- 

 periment stations x have established this fact. The following 

 data from Illinois 2 may be cited, comparing the response of 

 maize and oats when manured to the increased yield of clover 

 receiving the same treatment. (See Table CXXII, page 534.) 



CROP 



FOOD LOSSES 



Fig. 63. — Diagram showing the proportion of the harvested crop added to 

 the soil in farm manure under average conditions. 



It is easy to see that a liberal dressing of manure on the 

 hay and pasture will markedly increase the crop. Neverthe- 

 less, as manure is available in limited amounts on the average 

 farm and as commercial fertilizers will give almost as good 

 returns on hay, it is generally considered judicious, except in 



1 Hunt, T. F., General Fertilizer Experiments; Ann. Eep. Penn. Agr. 

 Exp. Sta., 1907-1908, pp. 68-93. 



Thome, C. E., and others, Plans and Summary Tables of the Experi- 

 ments at the Central Farm; Ohio Agr. Exp. Sta., Circ. 120, pp. 101- 

 105, 1912. 



2 Hopkins, C. G., Thirty Years of Crop Rotation in Illinois; 111. Agr. 

 Exp. Sta., Bui. 125, p. 337, 1908. 



