Browsing by Author "Tallaksen, Joel"

Now showing 1 - 6 of 6
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    Life Cycle Energy and Carbon Footprint in Midwest Dairies
    (2015) Tallaksen, Joel; Reese, Michael; Heins, Brad
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    Mycorrhizal/Plant Factors Involved in Roadside Reclamation
    (2000-08-01) Charvat, Iris D; Agwa, Hamdy; Hebberger, Joanna; Tallaksen, Joel; Raley, Marcia; Gould, Elizabeth; White, Jennifer; Slack, Sarah
    The main goal of this research was to study mycorrhizal and plant factors involved in roadside reclamation. Our objectives included (1) producing mycorrhizal inocula for incorporation at restoration sites, (2) assessing the properties of soil additives and mycorrhizal inocula in potted greenhouse trials, (3) assessing the effects of soil amendments and maintenance techniques on mycorrhizal/plant parameters on recently established roadside rights-of-way, (4) assessing the longer-term effects of mycorrhizal reintroduction into prairie restoration sites, (5) monitoring mycorrhizal diversity of undisturbed Minnesota prairies for comparison to restoration sites, and (6) monitoring plant colonization in wetland and prairie habitats at a restored roadside site. Fertilization amendments favored the growth of undesirable weedy species and lowered the diversity of native plant species. Hence, the addition of fertilizer did not benefit native prairie plantings and generally is not recommended for use at roadside prairie restoration sites. The fungal inocula incorporated into roadside restoration plots enhanced native plant cover at one location, but had minimal impact at another location. Our results indicate that many factors influence the outcome of fungal inoculation. The mycorrhizal studies of native areas provide an information base against which to compare restored areas. The revegetation studies yielded recommendations for future restorations. Keywords: Prairie and wetland restoration, arbuscular mycorrhizal fungi, fungal inoculum, fertilization, seedbank, burning/mowing
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    Roadside Prairie and Wetland Restoration: Mycorrhizal/Plant Factors
    (Minnesota Department of Transportation, 1998-05) Charvat, Iris; Smith, Michael; White, Jennifer; Agwa, Hamdy; Tallaksen, Joel; Gould, Liza
    In this project, researchers studied mycorrhizal and vegetational characteristics at prairie and wetland restoration areas. Study objectives included the following: * quantifying the effect of fungal inoculum on plant communities at a Minnesota Department of Transportation (Mn/DOT) prairie restoration site near Cambridge, Minn. * evaluating the prairie forb germination rates * monitoring revegetation at prairie and wetland restoration sites * characterizing mycorrhizal status of native wetland and prairie areas for comparison to the restored sites * producing fungal inoculum for incorporation into further reclamation areas. Findings indicated that 15 months after planting, fungal inoculation resulted in significantly greater cover by native plant species than seen in control plots. At this site, mycorrhizal inoculation benefited the prairie restoration effort by encouraging earlier, more extensive establishment of the planted species. Ongoing studies at this site will determine the long-term effects of mycorrhizal inoculation on the plant community. The report also presents specific recommendations for future restoration efforts. The studies of mycorrhizae in native prairies and wetlands provide further data for a baseline against which to compare restored areas. In addition, fungal inoculum produced in this project has been incorporated into restoration plots at another Mn/DOT site.
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    Use of Mycorrhizal Inoculum as a Soil Amendment During Prairie Restoration
    (University of Minnesota, Department of Horticultural Science, 1997) Tallaksen, Joel
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    WCROC Dairy Life Cycle Models
    (2017) Tallaksen, Joel; Heins, Bradley; Johnston, Lee J.