New York AGRICULTURAL EXPERIMENT STATION. 419 
(2) That the 4, 8 and 10 formula is somewhat more efficient 
than the “ potato formula.” 
(3) That muriate of potash produced no definite deleterious 
influence on the quality of potatoes. 
EXPERIMENTS IN 1898. 
The experiments of 1897 have been repeated in 1898, in 
6 
accordance with the plan to continue them for a series of years. 
The work has been enlarged, however, by the addition of four 
more formulas or mixtures of fertilizing ingredients designed to 
test the use of such large quantities of potash salts as appears to 
be the custom on Long Island and in other localities. 
The 4, 8 and 10 formula, to which reference has been made, 
calls for the application of more potash than of either nitrogen or 
phosphoric acid. Certain observations in connection with former 
experiments led the writer to doubt the wisdom of this practice, 
though not to deny it, consequently an additional acre was se- 
cured on each of the four farms where potato experiments are in 
progress, to be devoted to experiments with varying amounts of 
potash salts. 
THE FERTILIZERS USED. 
The purposes of these experiments as now arranged require the 
use of eight different mixtures of fertilizing materials, the in- 
gredients and composition of which are given below. 
POTATO FORMULA. 
This formula is supposed to contain plant foods in nearly the 
proportions used by the entire potato plant excepting that the 
phosphoric acid is in considerable excess. Two mixtures were 
used : 
MIxtTuRE No. l. 
Ingredients. Composition. 
Nitrate of soda.......... ADZEIDSLINIILOREN. 5 a oye ois whe Syapstete « 7.0 per ct. 
High grade dried blood.. 900 Ibs. Available phos. acid.... 4.0 per ct. 
Acid phosphate ......... 50S 1DSi Se BOLaRlie. . ss ee... tareslere 10.0 per ct. 
Muriate of potash ...... 400 lbs. 
2,000 


