Artikkelit jotka sisältää sanan 'internal rate of return'
Kunnostusojituksen erilliskannattavuus muutamilla karuhkoilla rämeillä.
English title: Profitability of ditch-network maintenance on some oligotrophic pine mires.
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The paper presents the results of a study to assess the profitability of ditch-network maintenance on some oligotrophic pine mires. The alternative ditch-network maintenance methods compared were: ditch cleaning, complementary ditching, and ditch cleaning and complementrary ditching combined. Nine drained pine-dominated mires were chosen for investigation. Only the ditch-network maintenance costs were included in the calculations. Profitability was calculated for two cases: 1) the forest owner pays all the costs and 2) he obtains the maximum state grant. Without the state grant ditch-network maintenance provided a net present value of 870 FIM ha-1 with a 3 % rate of interest, of 220 FIM ha-1 with the 5 % rate of interest, and on internal rate of return of 5 %. With the state grant the results were: 1620 FIM ha-1, 970 FIM ha-1 and 10%, respectively. The conclusions were that in most cases ditch-network maintenance is profitable even without state grant. By using 3 % and 5 % interest rates, the complementary ditching and combination provided similar profitability, specially when the state grants were provided. Using the IRR criterion, the complementary ditching provided the best profit.
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Hytönen,
Finnish Forest Research Institute, Kannus Research Station, P.O. Box 44, FIN-69101 Kannus, Finland
Sähköposti:
ei.tietoa@nn.oo
- Aarnio, Sähköposti: ei.tietoa@nn.oo
Puutuhkalannoituksen kannattavuus eräissä ojitusaluemänniköissä.
English title: The profitability of wood ash-fertilizing of drained peatland Scots pine stands.
Avainsanat:
Scots pine;
wood ash;
forest fertilization;
internal rate of return;
net present value;
stem volume
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The profitability of wood ash-fertilizing (5-16 t ha-1) of four drained peatland Scots pine stands in central Finland was investigated. The profitability of forest drainage alone and forest drainage plus ash-fertilization was compared. After 44-56 years, the wood ash-fertilization had increased mean productivity by 3.1-12.1 m3 ha-1 a-1. Using an interest rate of 3 % and without subsidies, the net present value of the stands was 2500-20300 FIM ha-1 higher as a result of the ash-fertilization than the value given by forest drainage alone. The real internal rate of return due to ash-fertilization without subsidies was 3.7-9.3 %. The interest rate, the fertilization dose and related costs, and the stumpage prices affected profitability. The state forest improvement subsidies further increased the profitablity of ash-fertilization.
Key words: forest fertilization, internal rate of return, net present value, Scots pine, stem volume, wood ash
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Lauhanen,
The Finnish Forest Research Institute, Kannus Research Station, FIN-69100 Kannus, Finland
Sähköposti:
ei.tietoa@nn.oo
- Moilanen, Sähköposti: ei.tietoa@nn.oo
- Silfverberg, Sähköposti: ei.tietoa@nn.oo
- Takamaa, Sähköposti: ei.tietoa@nn.oo
- Issakainen, Sähköposti: ei.tietoa@nn.oo
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