FIELD EXPERIMENTS WITH FERTILIZERS. GS 
On the whole, the experiments with soy beans seem to 
indicate that small quantities of nitrogen may be profitably 
used in growing the crop when the effects on both the total 
yields of crop and the proportions of protein in the crop are 
taken into account. 
SOIL TEST EXPERIMENT. 
The purpose of this experiment is to study the deficiencies 
of soils as regards available plant food, the particular needs of 
different crops, and the best method of supplying them in 
fertilizers. The general plan of the experiment consists in 
dividing the field into similar parallel plots and applying differ- 
ent fertilizers to the different plots, but growing the same crop 
on all of them. 
The soil test of 1900 is the eleventh in a continuous series 
that has been carried on at Storrs on the same set of plots. 
_ The same fertilizers have been applied on the same plots each 
year, but the crops have been grown in a four-year rotation, 
as follows: corn, potatoes, oats and either cow peas or soy 
beans. Hach fertilizing material used has been such as would 
supply only one fertilizer ingredient; nitrate of soda to supply 
nitrogen, dissolved bone-black to supply phosphoric acid, and 
muriate of potash to supply potash. These materials have 
been applied singly, two by two and all three together. 
The method of dividing the field into plots for these expert- 
ments, and the kinds of fertilizers and the amounts per acre 
used on each plot, are illustrated by the following diagram. 
‘The plots are laid out with the long dimension north and south. 
The field slopes gently to the south, but with not enough in- 
cline to cause serious washing and cutting of the surface by 
water. ‘The soil of the field is a heavy loam, with a yellow 
clay loam subsoil. In 1888 and 1889, when the field was being 
cropped preparatory to being laid out for this series of experi- 
ments, it was noticed that the soil seemed to be poorer toward 
the west side of the field. For this reason the field was divided 
into two sets of plots, each one twenty-fourth acre in size, and 
the order of the plots in one of the two sets was reversed, as 
shown in the diagram. In considering the results of the ex- 
periments the data from both plots of the same numbers are 
combined and the results considered as if obtained from one 
