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NFI4
basal area
diameter classes · main tree species
unit of reference: protection forest region
unit: m²/ha
unit of evaluation: accessible forest without shrub forest
grid: 1.4 x 1.4 km grid
state2009/17
protection forest region
Jura + PlateauNorthwestern AlpsNortheastern AlpsSouthwestern AlpsSoutheastern AlpsSouthern Alps Switzerland
diameter classesmain tree species m²/ha± % m²/ha± % m²/ha± % m²/ha± % m²/ha± % m²/ha± % m²/ha± %
12-15 cmspruce0.370.570.580.580.770.2120.43
fir0.270.290.2130.0280.0440.0300.15
pine0.0380.0420.0490.1250.1180.0790.013
larch0.0640.0420.0440.2150.1240.1140.110
stone pine0.0.0.0.0.0710.0240.1200.0630.015
other conifers0.0230.0470.0410.0550.0270.0760.015
beech0.350.2110.2120.1260.0240.3110.24
maple0.180.1130.1190.1220.0300.1230.16
ash0.1100.1180.1210.0270.0300.1190.17
oak0.0270.0620.0510.1280.01000.0240.015
chestnut0.0710.0.0.0.0.0860.0.0.2180.018
other broadleaves0.180.2110.2160.3110.2160.590.24
total1.231.341.351.451.451.651.32
16-23 cmspruce0.961.561.481.382.160.6111.23
fir0.570.580.4120.1200.0300.1270.35
pine0.0300.1400.0410.4180.3170.0710.111
larch0.0350.0390.0460.7110.3170.4130.27
stone pine0.0.0.01000.01000.1190.2180.01000.013
other conifers0.0230.0650.0330.0640.0330.0.0.016
beech0.850.690.7100.2240.1200.9110.64
maple0.380.3110.3140.1190.0330.1210.25
ash0.290.1160.3180.1270.1320.2170.27
oak0.1180.0430.01000.1270.0530.1230.112
chestnut0.0740.0.0.0.0.0710.0.0.8130.113
other broadleaves0.380.2130.4170.5130.4181.280.45
total3.133.343.653.853.654.343.52
24-35 cmspruce1.763.653.472.784.061.3112.63
fir0.971.090.8120.2230.1280.1270.65
pine0.2160.1450.2330.7160.5170.1560.39
larch0.1250.0440.0421.3100.7121.0110.46
stone pine0.0.0.01000.0720.5190.4180.01000.113
other conifers0.1250.0570.0590.0.0.0580.0.0.021
beech1.951.391.490.3230.2211.2111.34
maple0.580.5110.7140.1280.1320.1260.46
ash0.490.3190.4160.2400.1380.3220.37
oak0.3130.0420.0720.1360.0740.3200.110
chestnut0.01000.0.0.0.0.0720.01001.1120.212
other broadleaves0.3100.2200.3170.4180.1271.3100.46
total6.437.147.346.456.246.946.71
36-51 cmspruce2.846.245.663.666.042.0104.12
fir1.751.771.590.3230.2220.2211.14
pine0.5100.2350.2250.6170.6150.1420.47
larch0.1190.0380.2332.481.4101.2100.65
stone pine0.0.0.0660.0730.4190.4150.0.0.112
other conifers0.1270.01000.0.0.0.0.0.0.01000.026
beech3.231.682.380.2250.3241.1111.93
maple0.470.4130.6110.1410.1520.1330.35
ash0.780.2160.5140.1400.0440.2230.46
oak0.4100.1390.0410.0390.1600.2230.29
chestnut0.0880.01000.0.0.0570.01000.9130.112
other broadleaves0.3120.1230.1250.1250.1280.7110.37
total10.1210.5311.137.849.236.849.51
>= 52 cmspruce3.057.157.863.596.572.7104.73
fir2.462.982.1100.4270.5190.5231.74
pine0.3130.1450.1410.3310.4190.0520.210
larch0.1200.1380.1333.982.0121.7110.95
stone pine0.0.0.0710.01000.4240.4200.01000.115
other conifers0.1340.01000.0.0.0.0.0.0.01000.032
beech2.451.3111.7100.1440.2351.1221.44
maple0.1160.2390.2270.0.0.0620.0630.114
ash0.4110.1300.2250.0720.0740.0460.210
oak0.5120.0460.1400.0610.1500.1390.211
chestnut0.01000.0.0.0.0.1670.01002.1210.320
other broadleaves0.3280.1510.1440.1430.0610.2330.219
total9.7311.9312.558.7510.258.4710.22
totalspruce8.7318.9318.7411.6519.346.8713.02
fir5.646.364.971.1180.8171.0174.03
pine1.080.4290.6252.1132.0110.3401.06
larch0.3140.2260.4258.464.584.472.24
stone pine0.0.0.1640.0711.4151.5130.0570.410
other conifers0.3170.0480.1260.0490.1280.0770.114
beech8.635.076.360.8190.8184.795.42
maple1.551.582.090.4170.3290.4171.14
ash1.860.8131.5110.4270.2280.8161.14
oak1.380.2300.2300.3230.1480.7150.76
chestnut0.0900.01000.0.0.1570.01005.0100.710
other broadleaves1.490.9131.1121.4110.9153.971.54
total30.5134.3235.7228.1230.6228.0231.21
© WSL, Swiss National Forest Inventory, 20.06.2020 #837855/304186
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