218 
Journal of Agricultural Research 
Vol. IX, No. 7 
been a strong lateral movement of nitrates in the surface layers, causing 
a variation from 0.18 to 5.85 mgm. (fig. 4). 
At the beginning of the irrigation season the soil of plot C, as shown in 
figure 5, had a fairly uniform lateral distribution of nitric nitrogen. 
During the irrigation season the distribution of nitrates was very uneven 
in this soil. 
tfLOTET. 
o-e 
6-/8 
/8-SO 
• 
--B-r«- 
4q 
l-B 
1 1 -. 1 1 BJ 
t 
1 
I 
--- 
A -- 
■n n 
0-6 
// 
S 
* g 
* ° 
•S' ° 
* ^ 
/ 
6-/6[ 
/8-SOl 
30 "- 42 \. 
/sr &A/0. 3*0. 4?rH /sr 3*0 3*0 4m. /&/: 3A/0. 3*0 4m. 
At?. OF //?/?/G*T/OA/ 
Fig. 4.—Diagram showing the distribution of nitrates in plots E and B before and after irrigations. Season 
of 1916. 
Plot E received only one^third as much nitrogen as plot A, and it was 
observed that the quantity of nitrate accumulating between the furrows 
was much smaller. However, in the upper 6 inches the lateral movement 
was consistent throughout the season and showed a variation from 0.29 to 
11.1 mgm. The lowest amount of nitric nitrogen found at a depth of 6 
to 18 inches was 0.08 mgm., and the maximum amount was 1.45 mgm. 
