168 STORRS AGRICULTURAL EXPERIMENT STATION. 
EXPERIMENT BY THE STATION. 
This experiment is the fifth in a series planned as a rotation 
soil test experiment, the same fertilizers being used on the same 
plots year after year.* Beginning with 1890 the crops grown on 
this field have been corn, potatoes, oats, cow peas and corn. 
The field slopes gently to the south, but not enough to cause 
serious washing. ‘The soil is a heavy loam, and the subsoil is a 
yellow, clay loam. In 1889 it was noticed that the soil seemed 
to be poorer toward the west side of the field. For this reason 
the field was laid out into two half-acre experiments, the order of 
the plots on the two being reversed, as per diagram. 
ARRANGEMENT OF PLOTS IN STATION EXPERIMENT. 
UNMANURED STRIPS SEPARATE THE PLOTS. 














HAST. 
eee | PLOT .Ys 
| sise iie PLOTex 
| ea cele | PLOTLG. 
H Piotr D. Pion E. : 
5) a OI SENSE : 
oe | PromEy Der, aes PLOT 00. e 
‘Ren Prone: 
PLOT 000, PLoTs.B; 




4 
PLoT X, Prior A; 
PLOT MY. PLor o. 
WEST. 
The yields of the duplicate plots in each case are averaged in 
estimating the yield per acre. This helps to eliminate the errors 
due to irregularities of soil. Beside the regular soil test, two 
other plots were added—one (X) with a medium amount (12,000 
pounds) of manure, and in addition dissolved bone-black at the 
rate of 160 pounds per acre; the other (Y) with a larger quantity 
(16,000 pounds) of stable manure, but without bone-black. 
In 1890 a soil test with corn (the first of the series) was made 
upon these same plots with the following results, which are 

* For description and results of earlier experiments on this field, see Report of this Station 
1890, pp. 69-71. ; 


