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NFI4
forest area
time of last treatment (classes of 10 years)
unit of reference: production region
unit: 1000 ha
unit of evaluation: protection forest perimeter SilvaProtect: access. forest without shrub forest NFI1/NFI2/NFI3/NFI4
grid: 1.4 x 1.4 km grid
state2009/17
production region
JuraPlateauPre-AlpsAlpsSouthern Alps Switzerland
time of last treatment (classes of 10 years)1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %1000 ha± %
less than 10 years ago17.61012.41249.9654.5611.912146.33
11-20 years ago6.9173.72324.9938.576.31880.25
21-30 years ago3.2252.03110.01428.287.01750.46
31-40 years ago2.9261.0457.01716.7116.21833.88
41-50 years ago1.6350.4715.01916.4119.41432.88
over 50 years ago5.3191.0459.71455.6662.14133.73
total37.3720.59106.53209.92103.03477.11
© WSL, Swiss National Forest Inventory, 11.07.2020 #845433/311764
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