Bui. 25, Div. of Agrostology, U. S. Dept. of Agriculture. 



Plate XXII 



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Fig. la.— Plantain iPlantago fasti- Fig. 16.— Blue Grama i Bouteloua oligos- 

 giata morrisi. a valuable annual tachyal as it grows in arizona. 



Forage Plant in southern Ar'zona. 



From photographs by I). (Jrifliths. 



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Fig. 2.— Range improvement Experiment, Tucson, Ariz., showing the Condition 

 OF the Pasture and the Method of Disk Harrowing. 



From a photograjili by I), liriflitli." 



