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Impacts of supplyshed-level differences in productivity and land Costs on the economics of hybrid poplar production in Minnesota, USA

Formally Refereed

Abstract

The joint effects of poplar biomass productivity and land costs on poplar production economics were compared for 12 Minnesota counties and two genetic groups, using a process-based model (3-PG) to estimate productivity. The counties represent three levels of productivity and a range of land costs (annual rental rates) from $128/ha to $534/ha. An optimal rotation age (ORA) was calculated that minimizes the annualized, discounted per-dry Mg biomass cost for each county, genetic group and land cover, and for two discount rates (5 and 10%). The ORA for the lowest-cost county (Todd) with specialist genotypes and a 5% discount rate is 14 years and the breakeven price at that age is $71 dry Mg-1, while for the highest-cost county (McLeod), the generalist genotype and a 10% discount rate the ORA is 10 years and the breakeven price at that age is $175 dry Mg-1. Planting after a previous poplar stand increased breakeven prices and increased the ORAs by 1 to 2 years relative to planting after a previous annual crop. The discount rate has a large impact on optimal poplar rotation ages and breakeven prices. All other factors being equal, an increase in the discount rate from 5 to 10% is expected to reduce ORAs by 2 to 3 years. High-productivity supplysheds can also be expected to have ORAs that are 2 to 3 years shorter than low-productivity ones.

Keywords

hybrid poplar, economics, land rent, discount rate, biomass, 3-PG

Citation

Lazarus, William; Headlee, William L.; Zalesny, Ronald S. 2015. Impacts of supplyshed-level differences in productivity and land Costs on the economics of hybrid poplar production in Minnesota, USA. BioEnergy Research. 8(1): 231-248.
Citations
https://www.fs.usda.gov/research/treesearch/47771