Forage Production on Important Rangeland Habitat Types in Western Montana

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Abstract
Peak standing crop and its variability were evaluated over a 3-yr period on 35 sites representing 13 important grassland and shrubland habitat types. Average production ranged from slightly over 600 kg/ha on the least productive habitat type to 2900 kg/ha on the most productive. Good sites seldom produced more than twice as much as poor sites within the same habitat type. Although as much as 2 1/2 times more herbage was produced on a site during the high year than during the low year, the maximum yearly difference for all sites averaged only 1 1/2 times greater. Variation of vegetation classes and factors [site and weather, particularly precipitation, differences] contributing to production differences are discussed.

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