2l6 
Journal of Agricultural Research 
Vol. IX, No. 7 
out, the results for the upper 6 inches show only the nitric nitrogen 
and 18 inches from furrows. Figure 3 shows the distribution of nitric 
nitrogen in the soil of plot A, beginning with the first irrigation and 
soTTVAfaF/zmypv s"/y?oA/AZ//?/?OM/ /&*&&& 
o-e* 
A9~sd 
30^2 
.MS? 477 /. /ST 477 /. /ST 4 ”*- 
A/a. 0/=~ //P/P/O^T/OA/ 
Fig. 3 *—Diagram showing the distribution of nitrates in plot A before and after irrigations. Season of 1916. 
continuing for four successive irrigations. The samples drawn just 
before the first irrigation show a rather even distribution of nitrates in 
this soil, which in the upper 6 inches amounts to about 4.5 mgm. After 
