Martin Faustmann

Martin Faustmann (born February 19, 1822 in Gießen , † February 1, 1876 in Babenhausen (Hessen) ) was a German forest scientist and forester .

Life

Faust man began in 1841 at the University of Giessen first Catholic theology to study, gave this study after one semester and forest science turned to. He studied with Carl Justus Heyer and Karl Zimmer and passed the first state examination in 1846 and the second in 1848. As early as 1846 he became an employee of the general forest and hunting newspaper edited by Georg Wilhelm von Wedekind . In 1857 he became head forester of Dudenhofen , residing in Babenhausen near Darmstadt, where he stayed until his death.

Services

Faustmann became important up to the present day by setting up a formula for calculating the value of trees, the Faustmann soil yield value formula . In today's notation it is:

${\displaystyle B_{u}={\frac {A_{u}+D_{a}(1+r)^{u-a}+\ldots +D_{q}(1+r)^{u-q}-c\,(1+r)^{u}}{(1+r)^{u}-1}}-{\frac {v}{r}}}$

Where:

B.	Land yield value
A.	Output value (free output proceeds)
D.	harvest-free thinning revenue
c	Culture costs
v	annual fixed costs
u	Rotation time
a, q	Thinning age
r	Discount rate

This formula was mainly used in the soil clean yield theory formulated by Max Preßler in 1858 , from which it emerged that forest management with spruce and pine monocultures and periodic clear cutting is the most profitable form of forest management, insofar this formula has its (ecologically unpleasant) effects up to the presence. The marginal analytical solution of Faustmann's formula formulated by Preßler was formally derived by Bertil Ohlin in 1921. The equilibrium condition of the marginal analytical solution of Faustmann's formula is called the Faustmann-Preßler-Ohlin theorem (FPO theorem) and forms one of the foundations of modern scientific forestry.

In addition, Faustmann and his wife developed the mirror hypsometer , a device for measuring the height of trees.

One of his last works was the creation of a formula for calculating the assets of the Hessian forest widow's fund, which resulted in the possibility of a considerable increase in the annual widow's pension, which was then realized. The first beneficiary of this increase was his widow after Faustmann's death.

Fonts

Faustmann published his writings mainly in the Allgemeine Forst- und Jagd-Zeitung (AFuJZ) and in the Forest Science Yearbooks (JdF), also edited by Wedekind .

• Illumination of a new method to determine the cubic content of tree trunks. AFuJZ 1847
• Resolution of a task of the forest value calculation AFuJZ 1849
• Calculation of the value of the forest soil and not yet manageable forest stands for forest management. AFuJZ 12/1849. Pp. 441-455
• The relation between wood and soil value. AFuJZ 1853
• At what "age" are the value of wood and soil equal to one another? AFuJZ 1853
• About a common system of measures and weights in forestry. AFuJZ 1853
• The appraisal of the forest soil intended for mining and the assessment of the profitability of the various stand, farm and crop types. JdF 1853
• How do you calculate the monetary value of young, not yet manageable wood stocks ... AFuJZ 1854
• An improvement to the tree height gauges. AFuJZ 1854
• The stem number in relation to the wood mass of the stands. AFuJZ 1855
• The mirror hypsometer. AFuJZ 1856
• The construction of forest roads in the basalt mountains with reference to other geognostic formations. AFuJZ 1857
• The intermittent and sustainable operation in relation to the forest value calculation and discussion of the question whether the value of an isolated forest parcel changes due to its connection with a larger sustainable complex? AFuJZ 1865
• The mirror hypsometer in its device for meter measure. Judeich'scher forest calendar for 1874 (Part II)

literature

• Richard Hess:  Faustmann, Martin . In: Allgemeine Deutsche Biographie (ADB). Volume 6, Duncker & Humblot, Leipzig 1877, pp. 587-589.
• Herbert Borchert: The determination of the economically optimal amounts of wood used for forest operations - A control-theoretical approach. Dissertation at the Faculty of Forestry and Resource Management at the Technical University of Munich. Freising 2000 ( PDF ) pp. 11–15

Web links

• Literature by and about Martin Faustmann in the catalog of the German National Library
• official homepage of the International Faustmann Symposium

Individual evidence

1. ↑ Borchert: The determination of the economically optimal amounts of wood used for forestry operations Freising 2000. S. 13f
2. ^ Bertil Ohlin: Till frågan om skogarnas omloppstid. In: Nationalekonomiska studier tillagnade professor Knut Wicksell. Published in: Ekonomisk Tidskrif No. 12, pp. 89–113