Differences

This shows you the differences between two versions of the page.

--- weight_volume_relationships [2012/05/23 14:17]
128.192.48.37
+++ weight_volume_relationships [2012/05/23 14:42] (current)
128.192.48.37
@@ Line 23: / Line 23: @@
     Pulpwood stumpage value per tree = (4(D-6)/100) * price/cord
     Number of Trees/Standard Cord = 90/4(D-6)
+====Weight-Cord-Cubic Foot Relationships====
+Pine weight - volume conversion factors vary with species, age of stand, and distance from the coast.
+Thus local conversion factors should be developed for each procurement area. Illustrative of the
+variations existing are the average estimated weights per 128-cubic foot cord for the major pine type
+groups:
+^Type                                    ^Green weight per cord Lbs.   |
+|Loblolly Shortleaf:                     |:::                          |
+|Texas to W. Louisiana                   |4700                         |
+|Central Louisiana through the Southeast |5200                         |
+|Longleaf-slash                          |5550                         |
+A cord of pulpwood from the Midsouth contains more wood now than it did 15 years ago.
+===Volume of wood per cord of pulpwood in the Midsouth===
+^Region        ^Year       ^All Species    ^Pine     ^Hardwood     |
+^Cubic feet per standard cord                                  ^^^^|
+|Midsouth      |1950       |--             |75       |78           |
+|Midsouth(1)   |1965       |81             |81       |80           |
+|East Gulf     |1964       |80             |80       |79           |
+|West Gulf     |1965       |82             |82       |81           |
+<sup>1</sup> East and West Gulf factors are combined in proportion to annual pulpwood production.
+In a pile of wood made up of perfectly smooth cylinders of identical diameter, the solid-wood content
+would be the same regardless of whether the diameter was large or small. But if diameters vary, the
+solid-wood content increases, because small sticks fill up some of the space between large ones. On
+the other hand, anything that causes deviation from the cylindrical (crook or roughness, for example)
+will lessen the solid wood content.
+When average diameter of bolts in creases, both these causes of variation operate to raise the
+solid-wood content. This is because the range in diameters in a pile usually becomes greater as
+average diameter of bolts in the pile increases, and also because large bolts tend to be less
+crooked and rough than small ones.

Service Forester's Handbook

User Tools

Site Tools

Differences

Page Tools