Carrying capacity of grazing ranges in southern Arizona . itude as that of the unplowedground, but has a smaller proportion of grass of any kind andalmost no perennial grass. The rate at which this area will beinvaded by the Isocoma will be of some importance. Xo seedlingsof this species were found on the plowed land in September, 1914,though special search was made for them. There were numerousseeding plants in the vicinity and a few of them on the plowedarea itself. NATURE AND RATE OF THE RECOVERY. A comparison of the condition of the fenced area as described byGriffiths at the time of its i
Carrying capacity of grazing ranges in southern Arizona . itude as that of the unplowedground, but has a smaller proportion of grass of any kind andalmost no perennial grass. The rate at which this area will beinvaded by the Isocoma will be of some importance. Xo seedlingsof this species were found on the plowed land in September, 1914,though special search was made for them. There were numerousseeding plants in the vicinity and a few of them on the plowedarea itself. NATURE AND RATE OF THE RECOVERY. A comparison of the condition of the fenced area as described byGriffiths at the time of its inclosure in 1903 ^ with its condition in1914, as given in this bulletin, brings out some interesting generaliza-tions as to the nature and degree of recovery that may be expectedupon overstocked and eaten-down ranges in this region whenproperly cared for. In 1903 the grasses were to be found in any-thing like a thick stand only as far north and west as a line con- 1 See Bureau of Plant Industry Bulletin 67. Bui. 367, U. S. Dept. of Agriculture. Plate ML. B^la^. FiQ. 1.— Grama Association in a Typical Form on the SantaRita Range Reserve.
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Keywords: ., bookcentury1900, bookdecade1910, bookidcar, booksubjectrangelands
