oN STORRS AGRICULTURAL HXPERIMENT STATION. 
For the sake of comparison of the results of these experi- 
ments with those given in former Reports, the protein in Table 
52 is calculated by the usual method, as nitrogen multiplied by 
the factor 6.25, according to the assumption that protein con- 
tains sixteen per cent. of nitrogen. It has been repeatedly 
pointed out, however, that this factor is only approximately 
correct. ‘This matter is discussed in some detail on page 76 of 
the present Report. ' 
Two sets of averages are given in Table 52 beyond. ‘The 
first are the averages of the analyses that are published for the 
first time in the present Report; the second are the averages of 
all analyses of similar materials made in this laboratory up to 
the present time. 
DESCRIPTION OF SAMPLES. 
All the analyses reported in the following table, excepting 
those of soy bean fodder (No. 6089), and silage corn (No. 
6090), are those of crops grown in the plot experiments con- 
ducted by the Station for the purpose of studying the effects of 
different kinds and amounts of nitrogenous fertilizers upon the 
yield and composition of different crops. For convenience in 
describing the samples and the growth of the crop from which 
they were taken, it may be stated here* that all] plots on the 
experimental field having the same number have the same 
kinds and amounts of fertilizers per acre. In the following 
descriptions of samples, therefore, the number of the plot will 
serve to indicate the fertilizer used in growing the crop, as 
shown by the scheme given here: 





KINDS OF FERTILIZER APPLIED AND AMOUNTS PER ACRE, 
PLOT) No: 
Dissolved Muriate of Nitrate of Sulphate of 
bone-black. potash, soda. ammonia. 
Lbs. Lbs. | Lbs. Lbs. 
QO, 00 ra so | = ose 
6a, 66 320 160 | _ =e 
7 320 160 | 160 — 
§ 320 160 | 320 —— 
9 320 160 | 480 me, 
10 320 160 | — 160 
II 320 160 — 320 
12 320 160 | — 480 





* For more complete description of the experiments see previous Reports of the 
Station, and also pages 168-204 of the present Report. 
