THE POTATO 493 



This confirms what I have already recognized in 

 regard to other crops — that is to say, that ma- 

 nure in moderate doses and with complementary 

 fertilizers is more advantageous than a heavy 

 fertilization of manure alone. The doses of 

 phosphoric acid and potash should be increased 

 in poor soils and diminished in rich soils. They 

 should be buried before sowing. As to the ma- 

 nure, it should be turned under before the winter, 

 if possible. Nitrate of soda should be spread at 

 the time of harrowing.' 



'*This writer states that upon reduced surfaces 

 he has obtained 550 quintals {5.5 tons) of potatoes 

 per hectare (2.47 acres). The maximum yield 

 observed upon a larger scale and upon surfaces of 

 from 7 to 16 hectares (17.29 to 39.52 acres) was 410 

 quintals (4.1 tons). He considered a satisfactory 

 yield, with proper cultivation, to be about 300 

 quintals (3 tons) per hectare (2.47 acres.) 



"It is rather doubtful whether American potatoes 

 can be sold profitably in Europe, or, at all events, 

 in Germany, in spite of some rather optimistic dis- 

 cussion of the subject. Wholesale buyers can pro- 

 cure German potatoes to-day (December 22, 1910) 

 at $2 per 220 pounds for the 'egg' variety, and 

 $1.52 per 220 pounds for the 'Magnum Bonum' 

 variety. 



"(Prices on June 28, 1911, date of copy of this 

 report, as follows: Egg potatoes sold out. At 

 present 'long spring potatoes' are on sale and are 

 worth $2.38 to $2.62 per 220 pounds. 'Magnum 

 Bonum' scarce at present and worth $2.09 per 

 220 pounds. — R. P. S). 



"In order to sell American potatoes in Germany, 

 it would be necessary to lay them down in New 

 York at not more than the above figures, less the 



