P14 Rerort on Crop Propuction oF THR 
1i2, 187 and 154. The data secured in 1899 and 1900 are given 
herewith, together with a summary of the outcome of the six 
years’ observations, 
The primary object of these experiments was to gain informa- 
tion concerning the quantity of fertilizer which is profitable in 
potato production under the conditions with which Long Island 
farmers have to deal. 
Other problems incidental to the main one, but perhaps equally 
important or more so, such as (1) the most efficient mixture of 
ingredients, (2) the necessity for a generous use of potash in 
‘potato growing, (8) the effects of the different forms of potash, 
(4) the possibility of continuous cropping when only commercial 
fertilizers are applied to the land and (5) the essential factors in 
fertility, may be studied in the light of the observed data. 
PLAN OF EXPERIMENTS. 
The experiment of 1895 and 1896 was conducted on the farm 
of H. L. Hallock, Jamesport. Twenty-six plats, about one-eighth 
of an acre each, were used. Ten different brands of fertilizers 
were applied, each supposed to be especially adapted to potato 
growing, in quantities of 1,000 lbs., 1,500 Ibs. and 2,000 Ibs. per 
acre. The several brands contained from 2.6 to 4.5 per ct. of 
nitrogen, from 6 to 9.8 per ct. of available phosphoric acid and 
from 6.2 to 11.5 per ct. of potash. 
In 1897 experiments were instituted on four quite widely sep- 
arated farms on Long Island as follows: 
W. A. Fleet, Cutchogue. 
H. L. Hallock, Jamesport. 
W. L. Jagger, Southampton. 
R. H. Robbins, East Williston. 
For the first year two acres of land were utilized on each farm 
and in 1898 another acre was added in each locality. The total 
number of plats in 1897 was 80 and in 1898, 1899, and 1900 it was 
120, the plats being one-tenth acre in size. There were there- 
fore 30 plats on each farm; and the treatment begun the first 
year was continued uniformly throughout the four years. 
