Nitrogen Fixation 
SAMPLES TAKEN TWO INCHES DEEP. 
33 
Alfalfa plot, fallow place 
Beet field, fallow place . 
Per Cent Nitric 
Nitrogen 
Oct. 4 
Oct. 6 
Oct. 16 
0.00045 
0.00040 
0.00035 
0.00085 
0.00120 
0.00035 
0.00050 
0.00040 
0.00010 
0.00005 
0.00005 
0.00005 
0.00500 
0.00350 
0.00100 
0.00225 
0.00120 
SAMPLES TAKEN THREE INCHES DEEP. 
October 7, 1909. 
Per Cent Nitric Nitrogen 
In the row Between rows 
Near a fallow spot.0.000075 0.000100 
In the fallow spot . 0.002800 
In the row nex to the fallow spot. 0.000400 . 
First full row on north side near west end.0.000150 0.000050 
Nineteenth row from N. side near W. end.0.000150 0.000200 
Thirty-fifth row from N. side near W. end.0.000300 0.000075 
First row on north side near east end. 0.000500 0.000100 
Forty-seventh row from N. side near E. end. 0.000300 0.000150 
Midway between ditch and fallow spot.0.000500 0.000150 
Fifth row south of fallow strip. 0.000200 0.000500 
One hundred feet from S. and E. sides.0.000200 0.000100 
One hundred feet from west side between ditch 
and fallow spot.0.000200 0.000300 
One hundred feet from W. and S. sides.0.000250 0.000250 
The middle of the field .0.000200 0.000075 
Twenty feet south and east of fallow spot.0.000100 0.000075 
Near the fallow spot.0.000150 0.000100 
These samples were taken between the beets in the rows and 
between the rows to see whether any difference in the percentage 
of nitric nitrogen could be detected. 
SAMPLES TAKEN TO A DEPTH OF 234 FEET. 
October 18, 1909. 
Per Cent of Nitric Nitrogen 
South of Agr’l Hall near N. end of grain field.0.000070 
South of Agr’l Hall near the S end of grain field .0.000350 
South of Agr’l Hall near the W. side, alfalfa 1908.0.000100 
Unused roadway next to the beet plot.0.001600 
Between plants, alfalfa plot Expt. Farm.0.000800 
In the beet plot, among the beets.0.000075 
