Mar. i, 1924 
Movement of Water in Irrigated Soils 
675 
surface and also the total salts as determined by electrical conductivity. 
The salt content is given in the figures and is also shown as segments of 
the circles. A full black circle would indicate 3 per cent of salt. 
In the spring of 1922 the field had been sown to oats and alfalfa. 
Prior to the beginning of these observations it had been irrigated as the 
needs of the crop indicated. Irrigation was continued after the observa- 
396/ — 
CONTOUR RND OURL/TY OR GROUND /YRTRR AUGUST 3 - /922 
SER/EG y SOUTH END. 
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SRLT CONTENT 
CONTOUR 79ND QURL/TY or GROUND WRTER NOVEMBER /6 ~/922 
SER/ES Y SOUTH END. 
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Fig. ii.—C ross section of 12 plats in the south end of the Y series at the Newlands Experiment Farm. 
tions were begun, but with the aim of putting on all the water the land 
would take without injuring the young alfalfa. Nine irrigations were 
applied between August 5 and October 15. All of the water applied 
was held on the plats to soak in. In these plats the texture of the surface 
soil is extremely variable, ranging from coarse sand to a mixture of sand 
and clay in which the clay predominates. The subsoil conditions are no 
