Carrying capacity of grazing ranges in southern Arizona . Fig. 1.—a Very Dense Stand of the Six-Weeks Grasses on the Santa Rita Range Fig. 2.—The General Appearance of the Best of the Black Grama Association ON THE Reserve. GEAZIKG EANGES IN SOUTHEEX AEIZONA. 9 CHARACTER AND DISTRIBUTION OF FORAGE. Attention has already been directed to the variation in the averageannual precipitation that occurs on different parts of the Santa EitaEange Reserve and its relation to the forage crop produced. Protection from stock has allowed the plants of the greater part ofthe range to assume somethi
Carrying capacity of grazing ranges in southern Arizona . Fig. 1.—a Very Dense Stand of the Six-Weeks Grasses on the Santa Rita Range Fig. 2.—The General Appearance of the Best of the Black Grama Association ON THE Reserve. GEAZIKG EANGES IN SOUTHEEX AEIZONA. 9 CHARACTER AND DISTRIBUTION OF FORAGE. Attention has already been directed to the variation in the averageannual precipitation that occurs on different parts of the Santa EitaEange Reserve and its relation to the forage crop produced. Protection from stock has allowed the plants of the greater part ofthe range to assume something like a normal adjustment amongthemselves and to the climatic conditions, and this adjustment has re-sulted in certain tolerably well-marked groupings of species of plantsthat cover areas of considerable size. Such assemblages of species,which have similar climatic and soil requirements and live togetherin a given area, are here called plant associations, and five of theprincipal associations are named. An attempt to map somewhatroughly the area covered by each, in order that the relative impor-tance and productivity of each may be r
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Keywords: ., bookcentury1900, bookdecade1910, bookidcar, booksubjectrangelands
