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Table 4 Estimated density of tension wood in first and second growth rings of Salix varieties

From: Enzymatic hydrolysis of the gelatinous layer in tension wood of Salix varieties as a measure of accessible cellulose for biofuels

Stem (cm) Density (kg/m3) Entire sample
Tension
1st growth ring
Tension
2nd growth ring
Tora
 360 417.2 488.0 454.4
 200 412.1 489.3 462.3
 80 443.1 492.6 491.7
 Average 424.1 489.9 469.4
Björn
 360 439.6 508.3 451.3
 200 457.3 507.5 455.8
 80 455.8 512.9 490.9
 Average 450.9 509.5 466.0