Providing evidence to improve practice

Action: Add lime to the soil to increase fertility Forest Conservation

Key messages

  • One replicated, randomized controlled study in the USA found that adding lime increased vegetation cover.


Supporting evidence from individual studies


A replicated, randomized, controlled study in 1991-1995 in a degraded temperate coniferous forest in Idaho, USA (Walsh & Redente 2011) found that adding lime to the soil before restoration planting increased total plant cover. Total plant cover was higher in lime addition (38-40%) than control plots (17-23%). Control and lime addition treatments (at 11,000 kg/ha ) were each applied in 1991 to eight plots (3 × 10 m) at each of two hilltop sites. All plots were fertilized with nitrogen, phosphorus and potassium at 112, 56 and 90 kg/ha respectively. Plots were planted with western white pine Pinus monticola trees, shrubs and grasses before treatments in 1991. Data were collected in 1995.


Referenced papers

Please cite as:

Agra, H., Schowanek, S., Carmel, Y., Smith, R.K. & Ne’eman, G. (2017) Forest Conservation. Pages 285-328 in:W.J. Sutherland, L.V. Dicks, N. Ockendon & R.K. Smith (eds) What Works in Conservation 2017. Open Book Publishers, Cambridge, UK.