Inverting improves establishment of Pinus contorta and Picea abies —10‐year results from a site preparation trial in Northern Sweden

  • Published source details Örlander G., Hallsby G., Gemmel P. & Wilhelmsson C. (1998) Inverting improves establishment of Pinus contorta and Picea abies —10‐year results from a site preparation trial in Northern Sweden. Scandinavian Journal of Forest Research, 13, 160-168.


This study is summarised as evidence for the following.

Action Category

Prepare the ground before tree planting

Action Link
Forest Conservation
  1. Prepare the ground before tree planting

    A replicated, randomized, controlled study in 1986-1996 in boreal forest in Sweden (Örlander et al. 1998) found that site preparation treatments increased survival and biomass of planted lodgepole pine Pinus contorta and Norway spruce Picea abies seedlings. Survival rates were higher with all four site preparation treatments compared to controls for both pine (inverting: 98%; ploughing: 98%: mounding: 90%: disc-trenching: 86%; control: 72%) and spruce (inverting: 98%; ploughing: 100%: mounding: 96%: disc-trenching: 95%; control: 70%). biomass (g dry weight/seeding) of pine was higher in inverting and ploughing than the other three treatments (inverting: 392; ploughing: 338: mounding: 137: disc-trenching: 143; control: 36) . Biomass of spruce seedlings was higher in inverting than disc-trenching and control treatments, and higher in ploughing and mounding than control plots (inverting: 74; ploughing: 63: mounding: 63: disc-trenching: 32; control: 9). In 1986, five treatments: control (no soil scarification); disc trenching (with powered discs); mounding (with spades); ploughing (with tilt-plough); inverting (tilt-plough made furrows refilled with inverted soil) were randomly replicated eight times. Twenty spruce and 20 pine seedlings were planted in each treatment replicatein 1987. Survival and biomass data were collected 10 and four years after planting respectively.


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