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Providing evidence to improve practice

Individual study: Evaluation of fertilizer on pronghorn winter range in Alberta

Published source details

Barrett M.W. (1979) Evaluation of fertilizer on pronghorn winter range in Alberta. Journal of Range Management, 32, 55-59


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Apply fertilizer to vegetation to increase food availability Terrestrial Mammal Conservation

A replicated, controlled study in 1977 on a sagebrush grassland site in Alberta, Canada (Barrett 1979) found that fertilizing sagebrush increased its usage by pronghorns Antilocapra americana. There were 21% more pronghorn faecal pellets on fertilized sagebrush than on unfertilized sagebrush (counts not presented). The proportion of sagebrush leaders browsed by proghorns in fertilized plots (34%) was higher than in unfertilized plots (18%). Twenty-two pronghorns were retained in a 256-ha enclosure from April 1975 to November 1977. Twelve plots, each 6 × 15 m, were fertilized, with 84–252 kg N/ha and 39–118 kg P/ha, on 29 April 1975. For each plot, two unfertilized control plots were established. In November 1977, pronghorn use of plots was assessed by faecal pellet counts and by assessing the proportion of sagebrush leaders that was browsed.

(Summarised by Nick Littlewood)