samsiowio a PYxtrsoxsi 
Mar. 3,1933 
Effectiveness of Mulches upon Soil Moisture 
739 
can not wet it thoroughly, and since its capillary system with the subsoil 
is not connected up, no water can be drawn downward. The water is 
being held in the upper layers of the mulch and then lost to the air 
1 > 
tAXbbim 7 & 3 TT. 4 €TT. 
DISTANCE ROD HlbOIE OF PLOT 
Fig. 6 .—Diagram showing the gradual decreases of moisture iin the soil to the depth of 6 feet from the 
mulched plots to the adjoining unmulched land to illustrate side leaching. 
directly and completely. At Nephi, or elsewhere in the dry-farming 
regions, where the annual precipitation is low and only a small part of it 
comes during the summer months, shallower cultivation is to be preferred 
to the deeper. 
