. Bulletin of the Department of Agriculture. Agriculture; Agriculture. DAMAGE TO RANGE GRASSES BY THE ZUNI PRAIRIE DOG 11 Table 3.—Quadrat study, giving weights of grasses clipped in fall from perma- nent meter quadrats under the different conditions as stated, to indicate the amount of forage destroyed by prairie dogs at Williams, Ariz., 1922. Kind of grass. Total- protection area. Rodent- grazed area. Cattle and rodent grazed area. Quantity destroyed by Grams. Grams. Grams. Grams. 1 Obtained by subtracting amounts under rodent-grazed conditions from those und
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. DAMAGE TO RANGE GRASSES BY THE ZUNI PRAIRIE DOG 11 Table 3.—Quadrat study, giving weights of grasses clipped in fall from perma- nent meter quadrats under the different conditions as stated, to indicate the amount of forage destroyed by prairie dogs at Williams, Ariz., 1922. Kind of grass. Total- protection area. Rodent- grazed area. Cattle and rodent grazed area. Quantity destroyed by Grams. Grams. Grams. Grams. 1 Obtained by subtracting amounts under rodent-grazed conditions from those under total protection. The rodents concerned are chiefly prairie dogs; a negligible quantity of forage may have been taken by others. O ^OO /.OOO 4&OQ TOT/9L W//S&TG/B&&S / 0#OPS££D-\ ^5£<V2r G/?S9Af/?--- 1 ^gasmmy^. ^^^s7-/^oy£:/y &y />se*//5/£r &og& B232I AM Fig. 1.—Quantitative destruction of forage by prairie dogs. Composite record from experiments of four years at Coconino, Ariz., and of one year at Williams, Ariz. The figures in Table 3 show that under the conditions of this ex- periment prairie dogs destroyed the forage at the rate of 324 pounds of the 390 pounds produced on an acre in the year; or, putting it another way, rodents reduced the available stand of the blue grama— the most important forage grass in the region—by 83 per cent. />£& C&A/rftt /9GyQ£: />£*> Y&9& O 25 SO 7S /OO. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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