sible corn yield of that year. 
The Relation of Nitrogen. 
161 
Much data was obtained relative to fer- 
tilizer treatment, kinds of weeds prevalent, the use of limestone, and 
especially the approximate crop yield as estimated by the man in charge 
of the farm. The following determinations were made on soil samples: 
First, total organic matter; second, total nitrogen; third, total phos- 
phorus; fourth, presence of carbonates and acidity to litmus paper. 
The 
tables which follow will give a partial composition in per cent and 
pounds per acre (6.66 ins. 2,000,000 Ibs.), together with the yield of 
corn per acre where the samples were secured: 
TABLE TI. 
Content of Nitrogen, Phosphorus and Acre Yield. 
0 to 2% Organic Matter. 
Sample Bushels of Beat: Lbs. per Per Cent. Lbs. per Per Cent. Lbs. per 
No. Corn Bane Acre Nit. Acre Phos. Acre 
Matter 
32 18 1.75 35, 000 095 1,910 062 1, 242 
33 0 R32 26, 400 .070 1,400 .079 1,580 
34 0 .99 19, 800 039 785 .073 1,460 
35 10 1.47 29,400 0380 612 .116 2,022 
14 27, 650 ial 1,651 ave. 
i TABLE II. 
Content of Nitrogen, Phosphorus and Acre Yield. 2 to 4% ‘Organic Matter. 
a j 
Sample Bushels of roe Cont: Lbs. per Per Cent. Lbs. per Per Cent. Lbs. per 
No. Corn Matt £ Acre Nit. Acre Phos. Acre 
atter 
2x 30 2.08 50, 600 .105 2,100 .210 4,212 
13x 40) Bal 62,400 113 2,267 098 1,960 
14 25 3.36 67, 200 .110 2,204 .135 2,700 
16x 25 3.25 65, 000 -101 2,030 .078 1,566 
15x 35 3.62 72,400 .140 2,800 089 1, 782 
18 40 3.48 69, 600 105 2,100 108 2,160 
26x 35 3.30 66, 000 O91 1,820 O12 2,056 
PE CT Or) lla pe Soe 2.58 51,600 .073 1,466 .124 2,480 
DIVAN ull Rceshctteass Secs las Patan 50, 200 066 1,330 135 2,700 
39x 40 Shalaie/ 73,400 105 2,100 129 2,592 
56 15 2.23 44,600 O87 1,750 .480 2,970 
OVS Wi lis cern. leue'saeel Sane 3.79 75, 800 aie 3,159 1382 2,656 
Zao 62,400 2,093 2,486 ave. 
x—Soil acid. 
v—Virgin soil. 
s—Subsoil. 
11—16565 
