68 
In these ten series the difference is less in 1 x 8 rods calculation in 
seven cases out of the ten, while the average difference is — 
Hor the, 2x 4: calculations.2 +. 2...ces-...se0uns 17.4 lbs. per plat. 
Pa LK O WCACUHAEIOURee os teers hts ao soe cop eee 8. lies 4 
As in the two cases of the potatoes and corn, we have less differ- 
ence in the long-row calculation in eleven cases out of sixteen, we 
are justified in thinking that plats should be laid out long and nar- 
row in preference to a square area, but our data is scarcely sufficient 
for us to foresee how long the plats should be in order that two ad- 
joining plats shall attain to be duplicates of each other, under du- 
plicated conditions. . 
In all our calculations upon the efficiency of methods in our plat 
series we are subjected to the liability of error through not having 
any standard for the purposes of estimating the value of the varia- 
tions in crop noted. Yet the discussing of our results may afford 
some clew to practice, if interpreted in terms of greater or less, but 
we must guard against using the figures as representing absolute 
quantities, either by themselves or relatively to others with which 
they may stand in seeming comparison. 
% 
PovraTogs. 
The first question to be asked with potatoes is that of the influ- 
ence of the seed used, and we put it into the form of a query: 
What is the influence of position of the eye of the potato as re- 
gards crop? This question derives an importance from the quite 
general habit among farmers of rejecting the seed end of the potato 
for planting. For the purposes of the trial, Plats D. 7 and D. 10, 
each of one-twentieth of an acre, were taken, fertilized at the rate 
of 400 pounds superphosphates per acre, and planted with the single 
eyes in order as cut from the tuber. The same trial in 1883, with 
Plat C. 5, was as nearly as possible under identical conditions of 
method and treatment, and hence its results may be again presented 
here. The data obtained was: 
No. of No.of No. of Yield 
No. of eyes eyes eyes merchant- Total 
Plat. potatoes. planted. grew. failed. able. yield. 
e]ae Pe ketch meer a 30 581 557 25 388.7 lbs. 667.6 
: 8 oy ae tare Senet 28 583 549 34 524.1 Ibs. 568.5 © 
CLOW ISS4 .. os... 28 d81 573 8° 816.1 Ibs: so(gem 
Yield per 100 eyes or hills, in pounds: 
C. 5, 1883. D. 7. 1884. D. 10, 1884. 
(OIE OO ooo 
sj $ ram a § a 3 : 2 
BOSS yo Ba og 
o ra o = o 
S.C pM gery si DU Ra 
Stem eyes....... 62.18 15.48 26.81 104.47 84.50 7.75 92.25 55.11 10.79 65.96 
Central eyes..... 72.88 15.23 438.05 131.16 111.20 8.71 119.91 65.61 11.94°77.55 
Terminal eyes.... 73.73 15.72 33.41 142.86 88.67 7.88 96.55 43.96 9.88 53.84 
The four terminal. 82.55 20,33 40.32 143.20 85.92 9.41 95.83 87.09 9.63 
46.72 


