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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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INRAE Cedar Silviculture network

Network and its devices names
INRAE Cedar Silviculture network
Coordination : INRAE. Unité de Recherches Écologie des Forêts méditerranéennes UR629. Centre de recherche Provence-Alpes-Côte d’Azur.
Trials spread over the south-eastern quarter of France.

Sylviculture Cèdre INRA

Network description

INRAE Cedar Silviculture Network is a network of semi-permanent plots and experimental silviculture devices that concern a single species: the Atlas Cedar (Cedrus atlantica Manetti). The network consists of :

  1. Semi-permanent plots, often old ones, installed in stands subject to silviculture practised by the manager. In a few cases there may be two or three plots on the same site with either a control without intervention or several thinning intensities but with little deviation from current practices.
  2. More recent systems testing: in addition to a control without intervention, different silvicultural itineraries, some of which deviate greatly from current practices.


17 semi-permanent plots on 3.5 ha and 23 plots distributed in 3 experimental devices on 10.7 ha. Total: 14.2 ha.

Geographical distribution :

Southeastern quarter of France. Mediterranean region. Departments 07, 11, 26, 30, 84 (see map above).

Date of installation :

From 1923 to 2001 for semi-permanent plots. From 1989 to 1997 for the experimental devices.

Objectives :

  1. Influence of silviculture and competition on the growth and production of trees and regular cedar stands. Development of growth models.
  2. Influence of silviculture on the behaviour (growth, production and health status) of trees in the light of climate and drought events. Development of adaptive silviculture in the context of climate change.
Services offer

Monitoring of the still active sites. The data collected in the plots and network devices mainly correspond to full circumference inventories at 1.30m height and health status records of all trees. Measurements of total height and sometimes base height of living canopy are made on a sample of identified trees. These measurements are generally made every 5 to 10 years and at the time of each thinning.

During each measurement campaign, calculations are made and a report is produced.


The network is managed by a research engineer. Measurements are carried out by a team of 2-3 technicians.

Work description and access modalities

The network's devices and data are open to researchers from other teams, to answer research or technical development questions, within the framework of formalized collaborations (collaborative project or research agreement). The devices may also be the subject of accompanied visits for training and transfer, under conditions to be defined with the applicant.

Access unit and cost

To be defined on a case-by-case basis, for data formatting and field technical support.


No particular facilities.

Data set

Courbet, François, 2021, "Tree size data from three semi-permanent plots of the INRAE Cedar Silviculture network",, Portail Data INRAE, V1,