354 
Journal of Agricultural Research 
Vol. VIII, No. 9 
A comparison of the cropped soil receiving no manure with that to which 
15 tons were applied shows the moisture to decrease with the applica¬ 
tion of this amount of manure for no water and 5 inches of water; the 
Depth , 
Feet l 
Fig. 16.—Graph showing nitrates, total soluble salts, and moisture at different depths in a cropped soil at 
the close of the cropping season. Average of all moisture and manuring treatments for three years. 
total salts decrease with every irrigation treatment, but show the most 
marked effect where no water was applied; and the nitrates increase 
slightly and quite uniformly with all irrigation treatments. Downward,. 
Fig. 17. —Graph showing nitrates, total soluble salts, and moisture at different depths in a fallow soil in 
the fall. Average of all moisture and manuring treatments for three years. 
when averaged for all irrigations, the percentage of water was lower 
for the manuring only at the fourth, fifth, sixth, and seventh feet, where 
it was exceptionally low. The total salts of the lower feet of the manured 
