PLANTING 



95 



One inch deep were formed 2.3 inches below the surface ; 

 Three inches deep were formed 2.9 inches below the surface; 

 Five inches deep were formed 4.1 inches below the surface; 

 Seven inches deep were formed 6 inches below the surface. 



It was observed that those planted i inch deep fur- 

 nished many sunburned potatoes, while those planted 

 deeper had almost none. Gilmore, of Cornell, ob- 

 tained somewhat similar results during the year 1904. 

 Goff, 1 of Wisconsin, planted the Burbank variety at 

 different depths, and found that shallow planting in- 

 sured greater germination and more tubers per hill, but 

 that they were nearer the surface and had more ex- 

 posed tubers. 



TABLE X 



The Canadian Experiment Farms 3 report, as the re- 

 sult of four years' trials, that with tubers planted i 

 inch to 8 inches deep, where the sets were planted less 

 than 4 inches deep, nearly all the tubers were formed 

 between that depth and the surface, and when plant- 

 ed deeper than 4 inches most of them formed within 4 

 inches of the surface. The deduction made from these 

 results was that the potatoes developed in the surface 



1 Wis. Report, 1897, p. 306. 



3 Can. Exp. Farms Report, 1901, p. 117. 



