. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station . Fig. Unit in the 30-AcreIPasture Closed to Grazing in 1918. Note the plants of Artemisia frigida, which arc about normal in size and number. The top of the frame in each case marks the divisi< n between the closed units and those ne\ er grazed. October, 1921.

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforagep, bookyear1923