Carrying capacity of grazing ranges in southern Arizona . ngle of the United States Geological Survey contour map of theSanta Rita Mountain region. Another is an outline map (fig. 2)that shows where collections of material were made. The smallletters (without accent) refer to the spring collections made in theyears 1903 to 1908, inclusive. The accented small letters refer to the 1 See Bureau of Plant Industry Bulletin 67, preface, 2 See Bureau of Plant Industry Bulletins 67, 117, and See Bureau of Plant Industry Bulletin 67, p. 24 et seq. *As used in this bulletin, an animal-days feed eq
Carrying capacity of grazing ranges in southern Arizona . ngle of the United States Geological Survey contour map of theSanta Rita Mountain region. Another is an outline map (fig. 2)that shows where collections of material were made. The smallletters (without accent) refer to the spring collections made in theyears 1903 to 1908, inclusive. The accented small letters refer to the 1 See Bureau of Plant Industry Bulletin 67, preface, 2 See Bureau of Plant Industry Bulletins 67, 117, and See Bureau of Plant Industry Bulletin 67, p. 24 et seq. *As used in this bulletin, an animal-days feed equals the feed necessary for onemature animal, cow, steer, bull, horse, or burro, for one day. Calves or colts when sixmonths old are counted as mature animals, but are not counted at all before that time. GEAZING EANGES IN SOUTHERN ARIZONA. 6 fall collections of the same years. Figures without circles show thelocation of spring collections and those in circles show the locationsat which fall collections were made during the years 1912 to 1914, 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-carryingcapacity367woot
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Keywords: ., bookcentury1900, bookdecade1910, bookidcar, booksubjectrangelands
