FIELD EXPERIMENTS WITH FERTILIZERS. fee i: 
improvement in growth. To get light upon this question it 
was decided to apply lime to one series of sections and not to 
the other. In the experiments of 1898, therefore, the plots 
were treated with the nitrogenous and mineral fertilizers as 
explained in a preceding paragraph, and in addition 4o pounds 
of air-slacked lime (2,000 pounds per acre) was applied on 
each section in the series A at the north ends of the plots, but 
no lime was applied on series F at the south ends. No extra 
lime has been applied since then, as it was believed the action 
of the lime would continue for several years. For this reason 
the results of the experiments on the two series of corn sec- 
tions are reported separately. A comparison of the yields on 
the sections with and without Jime is given below in the dis- 
cussion of Tables 8 and 9. 
TABLE 8. 
SPECIAL NITROGEN EXPERIMENT ON WHITE FLINT CORN 
(SERIES A). 
Weight and cost of fertilizers per acre, total crop, and increase of 
crop over that of nothing plots. 



















YIELD PER | ESTIMATED | 4 
+ FERTILIZERS PER ACRE. ( Bane ee 3 4 
I-50 Acre PER ACRE ¥ 
3 es, ; 3 
: z Peo un pata oes 8 be 
a Kind. oa 3 05 B O15 E aon 
Lbs. | $ Lbs) bss oboe | Lbs. | Bu 
O Nothing, - - - ~ — |19.8 | 26.3|17.6/1315| — 
( Mixed Minerals, as No. 6a, |480) | 
7 1 Nitrate of Soda ‘(25 Ibs. N.), |160 TOAN AS Gi4 223 37,0 h ato eat 
Mixed Minerals, as No. 6a, |480) 
8 eee of Soda (50 lbs. N.), |320 ee! 62°0'/40'-0))55 +3) eae goo 
Mixed Minerals, as No. 6a, |480 } | 
1 Nitrate of Soda (75 lbs. N.), [480 § LOA OS ON AO tek ee 
Dis. Bone-black, ) Mixed § |320 | 
6a tee of Potash, one ‘Is, ( |160 BLA 29 OF AX O25 20) Ao Ohana ad 
Mixed Minerals, as No. 6a, 480 } 
IO | H uiph. ia ER (25 | Bea heat 1O.27) STOR ATS 45.5 | 2390 24.0 
( Mixed Minerals, as No. 6a, (480) |, | 
A Gutiph: of Am. (so lbs. N.), |240'$ [14739).01 79 | 55-® SS ree eke 
{ Mixed Minerals, as No. 6a, 480! Byes 
12/1 Sulph. of Am. (75 Ibs. N.); |360 f Ses ei eee ultesie) 58.912 75 37-4 
oo! Nothing, - - — — | 28.5] 30.8] 25.4|)1540| — 
64,| Mixed Minerals, as No. oe 480 6.14) 37.0) 45.3 9310 12205 | Pr. 5 


