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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of Fourteen-year-old oaks planted as repeatedly air-root-pruned container stock on mounds on a frequently flooded site high in clay with poor internal drainage. Jerry Van Sambeek, U.S. Department of Agriculture Forest Service.
ID: 947
Repeatedly Air-Root-Pruned Container Stock Out-performs Bare-root Planting Stock after 10 Years

Repeated exposure of tree roots to air, known as air-root-pruning, provides swamp white oak seedlings that continues to out-perform nursery bare ...

Principal Investigator : J.W."Jerry" Van Sambeek

Resource Management and Use2016NRS
Photo of Figure 1.—Overview of Shade Tolerance Laboratory for growing and evaluating forage productivity and quality of grasses and legumes under three light intensities (0, 45, and 20 percent of full sunlight) in the absence of competition from tree roots.  Credit?
Figure 2.—Jerry Van Sambeek, an USDA Forest Service research plant physiologist, examines growth of Virginia wildrye grass grown in an outdoor structure covered by shade cloth to evaluate effects of dense shade (20% full sunlight) on forage production and quality.
ID: 1238
Selecting the right shade-tolerant forages for restoring savannas or woodlands and implementing different agroforestry practices

Establishing ground covers is a common practice used in agroforestry, silvopasture (combining forestry with grazing), and savanna and woodland r ...

Principal Investigator : J.W."Jerry" Van Sambeek

Resource Management and Use
Water, Air, and Soil
2017NRS