FIELD EXPERIMENTS WITH FERTILIZERS. whe 
sections of plot 66. On the nitrate of soda group of plots there 
appeared to be some increase in the yield of seed with the 
increase in the amount of nitrogen used, the largest yield being 
found on the sections of the plot with the largest amount of 
nitrate of soda. On the sulphate of ammonia group of plots, 
however, the largest yield was obtained in the sections of the 
plots with the medium amount of sulphate of ammonia. ‘The 
yields on all the plots with the sulphate of ammonia average 
a little larger than those on the plots with nitrate of soda. 
While the yields from the sections of the plots with nitrogen 
in addition to the mineral fertilizers were considerably larger 
than from the section of plot 6a, the largest yield from the sec- 
tions with nitrogen in addition to the mineral fertilizers was but 
little larger than that from plot 66 with mineral fertilizer alone. 
TABLE I4. 
SPECIAL NITROGEN EXPERIMENTS ON SOY BEAN SEED. 
Weight and cost of fertilizers per acre, total crop, and increase of 
crop over that of the nothing plots. 







5 S a 
ve FERTILIZERS PER ACRE. sain eu i) 
ss ov ag Ao 
a ag aon) wee) 
GH 5 fan) US v a, 
. = Bs ae E © bo 
y Kind. = 8 io ac. an 
1) Fe D w 
ee Ss cat o 
Lbs: g Lbs. Lbs. | Bu. Bu. 
o| Nothing, - - — — 20.0 | 500.0 8.3 | — 
§ Mixed Minerals, as Lee! 6a, - | 480 a 
Paice Sada Cscelbs N.); 1.160, fov9°04 |, 32:5, ) 12-5) 13.5 bois 
Mixed Minerals, as No. 6a, - | 480 
8 1 Nitrate of Soda (so lbs. N.), | 320 13.14 | 36.0 | 900.0] 15.0 | 7.0 
Mixed Minerals, as No. 6a, - | 480 | | 
? 1 Nitrate of Soda (75 lbs. N.), | 480 16.64 | 37-5 | 937.5 | 15.6 | 7.6 
Dis. Bone-black, Mixed 320 
oe Mur. of Potash, Minerals, gat 6140), 28-0}, 700.0") 11-7 193-7 
Mixed Minerals, as No. 6a, - | 480) 
10 nen yay (25 ee N.). co) SR 10.27) °36.0)), 900:0:| 215.0%, 720 
Mixed Minerals, as No. 6a, - | 480] ; 
TI Pape. Lie (50 ibe N.), - | 240 § 14.39 | 39.0 975-0 16:24 4852 
Mixed Minerals, as No. 6a, - | ea | 
a2 1 Sulph. of Am. 75 ANGIE) eee Go Bites ere ba oul ce ane 

oo| Nothing, - nie ears am 18.5 | 462.5 fey 
64| Mixed Minerals, as wae 6a, = | 480 O14 Veg7-5 03 7% 5. 15.0 pe pO 







The amounts of nitrogen in the fertilizer and the proportion of 
protein in the crop.—The effects of the nitrogen of the fertilizer 
5 
