CORNELL 



1ReaMng*Course for jfarmers 



Published Monthly by the New York State College of Agriculture 

 AT Cornell University from November to March, and Entered at 

 Ithaca as Second-Class Matter under Act op Congress July i6, 1894. 

 L. H. Bailey, Director. 



SERIES VII. 

 HELPS FOR READING. 



ITHACA, N. Y., 

 DECEMBER. 1906. 



No. 32. 

 FERTILIZERS AND FERTILITY. 



FERTILIZERS AND FERTILITY. 



[A Supplement to Bulletin 3.] 



Series VII of the Reading-Course for Farmers does not attempt 

 a new and consecutive study of any one subject. Its purpose is to sup- 

 plement the former series, making suggestions as to clubs and ways of 

 procedure, and giving additional information on any of the former 





iT-' 





Potash 

 Nitrogen. 



Potash 

 Phos. Acid. 



Nitrogen 

 Phos. Acid. 



Nitrogen 

 Phos. Acid, Potash. 



Stable 

 Manure. 



Fig. 342. — Experimental plats zvitk different combinations of fertilising materials. 



Mr. H. H. Jones harvesting and weighing the experimental plats of potatoes. 



bulletins as occasion may require. The consecutive Reading-Course bul- 

 letins are comprised in the six series heretofore issued. Bulletin No. 3, 

 Series I, of the Farmers' Course, suggests many questions to our read- 

 ers. These questions have been put to the author of the bulletin, and 

 he has prepared the following statement covering the main points on 

 which information seems most to be wanted ; and this statement is pub- 

 lished in this form to save correspondence. 



343 



