. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station. Grazing; Forage plants; Agricultural systems. EFFECTS OF DIFFERENT SYSTEMS OF GRAZING. 29 20 for the 20-day periods, etc. The a annual" is fixed at September 1. as there is very little growth after that date.' In no season since these quadrats were started have the 10, 20, and 30 day quadrats made enough growth to afford vegetation for clipping at all possible periods. This has been largely because of drought. Figure 10 shows in graphic form the periods of growt
. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station. Grazing; Forage plants; Agricultural systems. EFFECTS OF DIFFERENT SYSTEMS OF GRAZING. 29 20 for the 20-day periods, etc. The a annual" is fixed at September 1. as there is very little growth after that date.' In no season since these quadrats were started have the 10, 20, and 30 day quadrats made enough growth to afford vegetation for clipping at all possible periods. This has been largely because of drought. Figure 10 shows in graphic form the periods of growth for the different species and groups. The 30-day period was selected for this study, as it represents each of the four months of the season and also corresponds to the weighing dates of the cattle. Bouteloua presents the most uniform line, showing that this species produces a 20 /O M/*?r kJC/VE Jt/Ly /<?(/&</*ST &0</T£LO(/# 20 /O ^T/P^ , ^20 y o /o OTrt£/2 <?G/?SS£S cr/?/?£x. 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 Sarvis, J. T. (Johnson Thatcher), 1886-; North Dakota Agricultural College; United States. Bureau of Plant Industry. Washington, D. C. : U. S. Dept. of Agriculture
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforagep, bookyear1923
