word problem

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• Subject: word problem
• From: David South <dsouth@FORESTRY.AUBURN.EDU>
• Date: Thu, 7 Mar 1996 17:17:29 -0600
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• Reply-To: FOREST Mailing list on forest research and studies <FOREST@LISTSERV.FUNET.FI>
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Dear netters:


I hope you will like the following problem


PROBLEM FROM SOUTH's COLLECTION

        A private landowner has a 15-year-old loblolly pine plantation and a
40-year-old loblolly pine plantation.  She decides to harvest pulpwood from
both stands and will take the wood to the local mill (located 5 km away)
that buys wood for  $80 per metric ton (wet; green; fresh weight).  She
sells 1000 cubic meters of 15-year-old wood and 1000 cubic meters of
40-year-old wood.  Wood is delivered to the mill the same day as harvest.

Using data in the table below, answer the following questions.


(1) Which age wood is worth more to this landowner?   ______________________

(2) In total, how much additional $ does she get for this age wood?
________________

(3) Which age wood is worth more to the pulpmill?         ______________________

(4) How much more (%) is this age wood worth to the pulpmill?
___________________



_____________________________________________________________
                                         Tree Age
                              15 years                 40 years
_______________________________________________________________
% juvenile wood                   85                       19
% moisture content (dry basis)   150%                     100%
specific gravity                 0.43                     0.51
Dry weight/green metric ton       400 kg                  500 kg
% pulp Yield (dry basis)          48%                     50%
_________________________________________________________________

The first person (per time e-mail sent) that sends me the correct answer to
all four questions will get a free copy of the following publication.

Progeny Testing of Forest Trees
Southern Cooperative Series Bulletin # 275
68 p.   February 1983




David South
School of Forestry
Auburn University, AL  36849-5418
USA

dsouth@forestry.auburn.edu

334-844-1022
334-844-1084 (FAX)

http://www.forestry.auburn.edu/coops/sfnmc/sfnmc.html

=========================================================================
The world population is expected to double by the year 2100.
Therefore the annual demand for wood for energy (etc.)
will increase and might double (to more than 7 billion m3/yr).
To provide plantation wood for people in the future,
support the planting of trees on pastureland.
Set a goal of converting 8 million ha of pastureland/yr for the next 55 years.
This would increase tree plantations to about 5% of the world's landbase.
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