. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station . i:#-; Fig. I.—Unit in the 30-Acre Pasture Closed to Grazing in I920. Note the planl j of ArU misia frigida, which are taller and more numerous than in the mm in L918and 1919. Oct ber, L921.

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforagep, bookyear1923