118 STORRS AGRICULTURAL EXPERIMENT STATION. - 
plots of the experiment, the kinds and quantities of the ma- 
terials used, and of the principle fertilizing ingredients con- 
tained in them are shown in the following outline plan. 
Plan of sotl test experiment.* 









MATERIALS FERTILIZING INGREDIENTS 
Plot ay PER ACRE, 
ae Kinds, paar nt pease Potash.| Nitrogen. 
| Ibs lbs. | Ibs. | Ibs 
o | ‘Nothing, ‘ : : o oly ele o's « ele 0\6 eo Rgiala | cls 9 tans 
A | Nitrate of soda, ; , «if TOO0 1.5.0.5 came lade een 25 
B Dissolved boneblack, : et 320 CK ee Pre re ee 
C | Muriate of potash, . : on) OEE OOE A ee yee 82." on eee 
D Dissolved boneblack, ! Vit ea20 55> | an cee see 
Nitrate of soda, ; : : TOO O\h oo ste > ee ee 25 
E } Muriate of potash, . : : TOGA i, 2G ce eee | 82 terete eian 
; Nitrate of soda, : ‘ q 160 11) 3. os ce 25 
F § Dissolved boneblack { mixed 320- 53 ae oneal ee 
| ( Muriate of potash, ? minerals L603. | Seater 82. ln oar eee 
Dissolved boneblack, Ones 20 53 |. os acter ene 
G Muriate of potash, . : Sp) LOOT aie see eens 82" tea 
Nitrate of soda, 2 : hi 100) ie peers SH ea 25 



* tae ee stripe separate the plots. 
“ Special Nitrogen” Experiments The object of these ex- 
periments, which were made with corn, oats, and mixed 
grasses, has been to study the effects of nitrogen in different 
amounts and combinations upon the different crops. The 
nitrogen was supplied as nitric acid in nitrate of soda, as am- 
monia in sulphate of ammonia, and as organic nitrogen in 
dried blood. Phosphoric acid was supplied as superphosphate 
in dissolved boneblack, and potassium was supplied in muriate 
of potash. | 
The amounts of nitrogen used were 25, 50, and 75 pounds 
per acre. The quantity of phosphoric acid used was 53 pounds, 
and of potash 82 pounds per acre. These quantities of phos- 
phoric acid and potash are, on the average, such as analyses in- 
dicate may be contained in a corn crop of 60 bushels of shelled 
corn per acre, with the corresponding stover. It is assumed 
that the same crop would contain 75 pounds of nitrogen, which 
amount per acre is accordingly designated as a full ration; and 
50 pounds is therefore called a two-third, and 25 pounds a one- 
third ration. The general plan of “ Special Nitrogen” ex- 
periments is shown in outline as follows: 

