New YorkK AGRICULTURAL EXPERIMENT STATION, 215 
FERTILIZERS USED. 
The purposes of these experiments as finally arranged required 
the use of eight different mixtures of fertilizing materials, the 
ingredients and composition of which are given below. 
The several formulas were made up by mixing together varying 
quantities of nitrate of soda, dried blood, acid phosphate and 
either the muriate or the sulphate of potash. 
It was intended that approximately one-fourth of the nitrogen 
furnished by these mixtures should be nitric, and three-fourths 
organic, nitrogen. The manufacturers who mixed the fertilizers 
were also instructed that the phosphoric acid should be as largely 
soluble as possible. Analyses of the four mixtures showed that 
these conditions were secured. 
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. The proportion of 
ingredients was approximately the following: 
Composition of Potato Formula. 
Nitrogen ® tis oe. 3 7.0 per ct. 
Available phos. acid. 4.0 “ 
BARES Ee edt wale giave's TSS goes 
Two mixtures were used under this formula: No. 1, in which 
the potash was supplied as the muriate, and No. 2, in which it 
was furnished as the sulphate. 
L, I. FORMULA, 
This formula is the one so commonly followed by clubs of 
farmers on Long Island who purchase their fertilizers on the 
cooperative plan. It was made up from the same materials as 
the potato formula, mixed in different proportions, 
Composition of L. I. Formula. 
NHEOSENT eka: oak 4.0 per ct. 
Available phos. acid. 8.0 “ 
OCssh Sivs oeleaic ess T..0° 7° 
As with the potato formula, the L. I. formula was made up 
in two mixtures, No. 3 containing the potash as the muriate, 
and No. 4, as the sulphate. 
