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Providing evidence to improve practice

Individual study: Arid old-field restoration: Native perennial grasses suppress weeds and erosion, but also suppress native shrubs

Published source details

Porensky L.M., Leger E.A., Davison J., Miller W.W., Goergen E.M., Espeland E.K. & Carroll-Moore E.M. (2014) Arid old-field restoration: Native perennial grasses suppress weeds and erosion, but also suppress native shrubs. Agriculture, Ecosystems & Environment, 184, 135-144


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

Irrigate degraded shrublands Shrubland and Heathland Conservation

A replicated, randomized, controlled study in 2008–2011 in two former pastures in Nevada, USA (Porensky et al. 2014) found that temporary irrigation increased shrub cover. After three years, areas where temporary irrigation was used had higher shrub cover than areas where no irrigation had been carried out (no data reported). At each site fifteen 27 m x 9.3 m plots were irrigated for the first two years of the experiment (2008 and 2009) while fifteen other plots were not irrigated. Grasses and shrubs were planted in all plots before irrigation began. In 2009 and 2011 shrub cover was assessed in all plots.

(Summarised by Phil Martin)