Brak in its Relation to Irrkjatiox. 



21 



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Plate VI. 



The Effect of Brak. 



Photograph of a high corner of the same mealie field where brak had killed some of 

 the plants and rendered others unthrifty. The brak in this case consists chiefly 

 of common salt. The use of more wai er here would have driven the brak down. 

 Note the white effloresence of brak in the field as well as at the side of the furrow. 



Plate VII. 



An alarming RigE of Brak. 



This photograph is of land below a dam. Water held on the other side of the dam 

 wall has raised the very brak subsoil water to within "capillary" reach of the 

 surface. As the subsoil water evaporates, it leaves the salts behind as a white 

 effloresence. Maay acres of land below this dam are too brak to support useful 

 vegetation. Note also the line of brak in the dam wall. 



