674 



IOWA DEPARTMENT OF AGRICULTURE 



TABLE XI. 

 The Effect of Ten Tons of Manure per Acre Before Seeding Alfalfa. 



Effect of Treatment. 



No. Of 

 Reports. 



Essential to greatest success 



Beneficial, but not necessarily essential in establishing a successful field 

 Beneficial, but some additional treatment also necessary for best results 

 No benefit from application 



Bone Meal: — To determine the effect of an additional supply of 

 phosphorus, bone meal was used on a portion of the plots. While it will 

 he seen by referring to table XII, that the bone meal was beneficial in 

 many cases it was not so necessary as manure. When used it should be 

 in connection with manure rather than alone as it seems quite apparent 

 that the organic matter and readily available nitrogen in the manure is 

 often quite necessary in getting the alfalfa well started. 



TABLE XII. 

 The Effect of 400 Pounds of Bone Meal per Acre Before Seeding Alfalfa. 



Effect of Treatment. 



No. of 

 Reports. 



Essential to greatest success 



Beneficial, but not necessarily essential in establishing a successful field 



Beneficial, but some other treatment also necessary for best results 



No benefit from application 



Fig. 15. — CuLLing alfalfa at the Iowa Experiment Station. This field 

 made 2.95 tons per acre of field cured hay, first cutting, 1912, and a total 

 of 7.03 tons wex'e cut during the season. 



