Carrying capacity of grazing ranges in southern Arizona . FiQ. 1—An Almost Pure Stand of Deer-Grass (Epigampes rigens) on the SandySoil of One of the Larger Arroyos on the Santa Rita Range Reserve. This grass is common in such Fig. 2. -An Arroyo Filled with Mesquite, Cats-Claw, and Other Shrubs onTHE Reserve. GEAZIIs^G EAiv^GES IX SOUTHERN AEIZOls^A. 17 necting C and I on the map (fig. 2). It was difficult to find anyblack grama in the field.^ In 1914 the perennial grasses had pushednorthwestward along the Tucson road at least IJ miles, if not 2miles, farther than they extended ab
Carrying capacity of grazing ranges in southern Arizona . FiQ. 1—An Almost Pure Stand of Deer-Grass (Epigampes rigens) on the SandySoil of One of the Larger Arroyos on the Santa Rita Range Reserve. This grass is common in such Fig. 2. -An Arroyo Filled with Mesquite, Cats-Claw, and Other Shrubs onTHE Reserve. GEAZIIs^G EAiv^GES IX SOUTHERN AEIZOls^A. 17 necting C and I on the map (fig. 2). It was difficult to find anyblack grama in the field.^ In 1914 the perennial grasses had pushednorthwestward along the Tucson road at least IJ miles, if not 2miles, farther than they extended about five years before, and wereestablished about 1 mile farther west along the south side of thefield. The crowfoot grama has reached the north fence, not as apure stand, but as the most important element of a well-developedthough not yet complete grass association. In this same area theblack grama is now abundant and spreading. Along the west fenceis an area where the black and wire gramas are becoming abundantand important. In the southwest corner is an area of a section ormore where ray less goldenrod {Isocoma hartwegii) showed a scat-tering growth in 1903.^ This same area is now thickly covered withlarge mature plants of this s
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Keywords: ., bookcentury1900, bookdecade1910, bookidcar, booksubjectrangelands
