![](http://www.alamy.com/thumbs/6/DCA7F1AC-6DFB-4F51-BBEE-CEF81D2560A0/MA72NP.jpg)
. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station . Fig. 2.—Same Area Shown in Figure I, Photographed in October, 1921 At this time it was estimated that per cent of the foliage cover had been removed by grazing.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforagep, bookyear1923