53 
A two-acre portion, with Welcome oats, 6 pecks per acre, the 
same amount of fertilizer, yielded 443 bushels. 
We, in this last instance, find that the differences in the crop do 
not follow the amount of fertilizer apphed, but seems to have been 
determined by the amount of seeding, and the variety grown. We 
have additional illustration in the yield of four duplicate plats of 
one-twentieth of an acre, 20 lbs. fertilizer having been used on each, 
and the same amount of seed. 
Yield per acre. 
oc -—_—— —A.. 
‘Straw. Grain. 
Peete Wile ftussian Oats... -c...< 2. o0--~s.---.- 1.605 tons. 824 bus. 
E. 18. Dh alNge! Uke Ria ele an MI i ap A 1.875 tons. 824+ bus. 
Tete ey vecomesoatsr ys: LT bec ee oe 1.630 tons. 542 bus. 
E, 19. do Crd. Baterotperw: aed. Sheik 12 90stons: 494 bus. 
Under aaftiidate otiaition®: the White Russian oats yielded prac- 
tically the same grain, but different amounts of straw, on the two 
plats; the Welcome differed 5 bus. in grain and nearly a quarter of 
a ton in the straw, while variety apparently produced about 30 bush- 
els difference. 
If we now compare the crops and fertilizer used in the fields and 
plats, we have:— 
VWelltestUesinne 200 1b5. tertilizersin field... sob . wend on 24 = 66 bushels. 
ASPET ZOr WR UE ce, ee a or oe 82 ye 
Welcome BO Moy Tere erin Mele. Soak Sek see wae 44 ¥ 
AOR TErtiIZery iy Diaban waco se oe tee Oe pe 
That is, the 200 lbs. increase of fertilizer makes 16 bus. difference 
in the White Russian, and 8 bus. in the Welcome if our figures are 
interpreted as they stand. 
The logical inference is, and probably true, that fertilizer does not 
show the same amount of effect upon all crops, but that we must 
use the best of seed in order to obtain the most profitable results 
from increased quantities of fertilizer. Expressed in axiomatic 
form, the more fertilizer used, the better should be the seed used. 
In a trial with fertilizer upon the plats, with potatoes, two unfer- 
tilized plats averaged 166 bushels total crop per acre, and two plats 
which received 500 Ibs. of phosphate per acre yielded at the rate of 
225 bushels per acre. Another series, without fertilizer yielded at 
the rate of 119.7 bus. total crop, while an adjoining plat which re- 
ceived phosphate at the rate of 1000 lbs. per acre yielded 153.6 bush- 
els. ‘Twelve other plats, which had 400 lbs. per acre of phosphate, 
yielded for an average 169 bushels. ‘The only conclusion from these 
trials must be that plat work is too uncertain for very exact conclu- 
sions, and the fertilizer question must be solved rather from other 
data than simply an increase of yield apparently coincided with use 
of fertilizer, an idea which is further elaborated elsewhere. 
Jn a trial with corn, reported elsewhere in more detail, three plats 
without fertilizer yielded in bushels of 80 lbs. each of ear corn, an 
average of 53.2 bushels of good, and 2.7 bushels of soft corn per acre; 
two plats with 500 lbs. phosphate per acre yielded 61 bushels good, 
and 4.9 bus. of soft corn; one plat with 1000 lbs. phosphate per acre 
yielded 67.4 bus. sound corn, and 2.9 bus. of soft. Interpreting our 
figures as given we may say the first 500 lbs. of phosphate produced 
8 bushels increase, and the second 500 Ibs. of phosphate produced 6 
bushels increase, but such a conclusion would be manifestly erroneous. 
