134 



AGRICULTURE ON THE PACIFIC SLOPE 



by laying drain-tiles in narrow ditches, cut three or four feet 

 deep, from which the alkali-charged water will flow easily 

 when the land is flooded. Or^else, as this is quite expensive, 

 we may leave the water on the land long enough to carry 

 the alkali down to three or four feet, then sow or plant the 



1st year 



2d year 



3d year 



4th year 



FIG. 71. The growth of wheat improves from year to year as the alkali 

 land is being reclaimed by proper treatment ; at the left after one year 

 of treatment; at the right after four years of treatment. 



