Carrying capacity of grazing ranges in southern Arizona . RELIEF MAP OF RANGE RESERVE Fig. 1.—Relief map of the Santa Rita Range Reserve, Ariz., and some of the territoryimmediately surrounding it. The plant-distribution map (fig. 3) is designed to put on recordan approximation to the present distribution of the principal groupsor associations of forage plants upon the reserve. Its use will beappreciated in the future study of the reserve if different adjust- BULLETIN 367^ U. S. DEPAETMEXT OF AGEICULTUEE. ments of the plant associations take place as the result of any partic-ular kind of
Carrying capacity of grazing ranges in southern Arizona . RELIEF MAP OF RANGE RESERVE Fig. 1.—Relief map of the Santa Rita Range Reserve, Ariz., and some of the territoryimmediately surrounding it. The plant-distribution map (fig. 3) is designed to put on recordan approximation to the present distribution of the principal groupsor associations of forage plants upon the reserve. Its use will beappreciated in the future study of the reserve if different adjust- BULLETIN 367^ U. S. DEPAETMEXT OF AGEICULTUEE. ments of the plant associations take place as the result of any partic-ular kind of treatment. It does not rest upon accurate surveys, butis the best approximation which could be compiled by continued ob-. Fig. 2.—Outline map of the Santa Rita Range Reserve. Ariz., showing where quadratcollections have been made and where hay has been cut. The small letters refer tocollections made from 1003 to 1908. inclusive, the unaccented letters indicating springand the accented letters fall collections. Likewise, the small figures refer to col-lections made from 1912 to 1914, inclusive, the figures without circles indicating collec-tions made in the spring and figures in circles fall collections. The shaded areas showwhere hay has been cut. The capital letters are introduced for convenience in reference. servations and study made while riding over the reserve in all di-rections twice a year for the past three years. It is not a stricthecological map, though some of its areas approximate the plant zonesof the region. There is no doubt that the natural distribution GEAZING EANGES I^ SOUTHEEN AEIZONA. 5 areas of certain species, and probably of the associations, had beenmuch displaced by the previo
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Keywords: ., bookcentury1900, bookdecade1910, bookidcar, booksubjectrangelands
