Jädraås Experimental Forest

Before Jädraås became an experimental forest, that is, during the years 1972–1979, the activities at Jädraås (Ivantjärnsheden) were primarily focused on projects such as the Ecology of the Coniferous Forest Landscape and the related project on Nutrient Cycling in the Early Clear-Cut Stage. From 1979, when Jädraås became an experimental forest within SLU, some of the nutrient and irrigation experiments continued as long-term trials, while most of the short-term experiments were discontinued. Of the early experiments, three long-term trials remain today (9802, 9804, and 9805, previously designated IH2, E73, and IH5C).

During the 2000's, new long-term field experiments for the regeneration of Scots pine (Pinus sylvestris L.) have been established. These experiments focus partly on different site preparation methods (mounding, spot scarification, and stump removal), and partly on comparisons of different regeneration methods for Scots pine (planting, sowing, natural regeneration with seed trees, gap regeneration) and lodgepole pine (Pinus contorta var. latifolia Engelm. ex S. Watson) (planting and sowing). New experiments comparing different tree species have also been established, including Scots pine, Norway spruce (Picea abies [L.] H. Karst.), hybrid aspen (Populus tremula (L.) x Populus tremuloides (Michx.)), poplar (Populus spp. L.), grey alder (Alnus incana (L.) Moench), and birch (Betula spp. L.).

The land-owner is Kopparfors Skogar AB.