Category Archives: Fertilization

Sweet Sorghum

Until recently, systematic breeding of sweet sorghum was sporadic with the USDA-ARS Meridian, Mississippi sweet sorghum breeding program being the only project devoted exclusively to this crop. Though it closed in 1988, many of the existing sweet sorghum varieties in the United States were derived from that program [86-88]. These varieties represent an array of different maturities, heights and agronomic […]

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Production Systems for Willow Biomass Crops

Willow biomass crops can be grown on marginal land using a coppice management system so that multiple harvests are generated from a single planting of genetically improved shrub willow varieties [21]. The system typically includes three-year rotations with one year of site preparation prior to planting. After the first growing season, the willow is coppiced and material is typically left […]

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Phylogeny, Chemical Composition

Pines evolved in the Northern Hemisphere, with most species naturally occurring between 20 and 70° latitude. The largest genus of conifers contains over 100 species, which may be divided into two or three subgenera. Some say the “hard pines” (subgenus Pinus) contain 64 species while “soft pines” (subgenus Strobus) contain 37 species. Members of the subgenus Pinus have two flbrovascular […]

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Residue Harvest

In Sweden, timber is harvested and sent to the saw mill while branches and tops are placed in piles along the road. Tarps are placed over the pile to help keep the pile dry. After several months of drying, the piles are transported to a central heat plant. The dried pine residue is burned to produce steam and hot water. […]

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Biomass Sorghum

Since biomass sorghum hybrids are photoperiod sensitive, seed production relies on either genetic control of photoperiod sensitivity or strategic planting in seed production environ­ments. In the latter, day length during winter months in tropical environments is sufficiently short to allow seed production of hybrids. In this situation, the greatest challenge is planting seed and pollinator seed stock in time to […]

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Willow Biomass Crop Economics

Despite the wide array of benefits associated with willow biomass crops, expansion and rapid deployment of this system has been restricted by high production costs and, in some situations, a lack of market acceptance. The economics of willow biomass crops has been analyzed using a cash flow model (EcoWillow) that is publically available from SUNY — ESF (State University of […]

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Tools for Propagation

Miscanthus can be vegetatively propagated by rhizome division but this process is time consuming. Developing an efficient tissue culture system would provide an alternative to rhizome division and be useful for breeding purposes. Tissue culture enables a large number of plants to be generated and stored regardless of the season. In addition, the risk of transferring diseases between fields is […]

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Heat of Combustion

The heat of combustion for wood is expressed as the high heating value (HHV) or low heating value (LHV). The HHV can be thought of as the gross amount of energy trapped in an odMg of wood while the LHV is the net energy after accounting for the moisture content of the wood. The HHV can be considered a theoretical […]

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