New York AGRICULTURAL EXPERIMENT STATION. 383 
An examination of the accompanying table will show that the 
application of potassium chloride to Plats 3 and 6 increased the 
crop considerably over that on F' 5, on which the same amount of 
seed and fertilizing elements were applied, but which received no 
potash. The larger amount on Plat 6 gives an increased yield 
over Plat 3. This third application of the same fertilizers for 
potatoes, on the same plats, seems to have increased the yields 
this season on an average of the two, as compared with the one 
receiving no nitrogen, by 16.7 merchantable, 23.6 where the 
weight of decayed tubers are added to the merchantable, and 
twenty-five bushels per acre where the small tubers are included. 
In the same way the application of potassium sulphate shows a 
small increase over the plat without potash. This increase is, 
however, too small to make this a profitable investment. 
Last season there was a smaller yield from each crop of the 
plats receiving sodium nitrate than from the one receiving no 
nitrogen. This season these yields have advanced while those 
receiving ammonium sulphate have not kept up last year’s rela- 
tion, although the mean gain has been 3.2 bushels per acre for 
merchantable, 9.1 bushels merchantable and decayed, and 8.2 
bushels total per acre. These results indicate: First. That for 
potatoes, potassium chloride is a good, safe fertilizer, even on 
some clay soils where potash may be said to be present in con- 
siderable quantity. Second. That while potassium sulphate helps 
the crop, it is far less effective than the chloride and not desirable 
when chloride can be obtained. Third. That the appiications of 
nitrogen in sodium nitrate and ammonium sulphate have been 
beneficial on some plats, but always at too great cost for profit. 
This element for potatoes should be supplied in the clover turf 
turned under to grow it, or from some other cheaper source. 
CHANGING SEED POTATOES, oR GROWING PoTATOES FROM SEED 
RAIsED AT A DISTANCE OR ON DIFFERENT SOIL. 
There is an old custom among our best farmers of changing 
seed potatoes from one kind of soil to another, in the belief that 
the prolificacy is thereby increased, and that they secure a better 
yield from so doing. A trial of this was planned as a part of the 
potato work for this season, and White Star seed was obtained 
of Mr. Frank Hood, of Oaks Corners, N. Y., and also of Mr. 
Chas. E. Peck, of Phelps, N. Y. Both gentlemen raised 
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