North Dakota State University * Dickinson Research Extension Center
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RENOVATION PROJECT AT DICKINSON EXPERIMENT STATION
NDSU Extension Service
North 1/2: Natural Regeneration Demonstration
Species: Green ash and Caragana
Evaluation every 3 years and thinning as needed.
- Allow natural thinning to occur
- Do not remove too much cover that will allow weed competition into the windbreak
- The end product trees should be straight, healthy stock possible seed trees for future
SOUTH 1/2: INTERPLANTING PINE FOREST STAND DEMONSTRATIONS (SEE ENCLOSED MAP)
- Thinning and removal of diseased and dead spruce, any broadleaf tree or shrub species
- Interplanting of Douglas-fir (Flathead Lake, Montana Seed Source), White fir and Fraser
fir (source Mountain Home Nursery), Ponderosa Pine
- Weed control - use Roundup to control bromegrass
- Possible supplement pine mulch with wood chips
ROCKY MOUNTAIN JUNIPER - EASTERN RED-CEDAR COMPARATIVE
- Evaluate by observation growth of each species in weed barrier.
- Evaluate by observation growth of each species as an interplanting under canopy cover
- Replanting dead trees - make note of survival/replacement rate by species
ROCKY MOUNTAIN DOUGLAS-FIR TRIAL DEMONSTRATION
- Planted Douglas-fir (Idaho Seed Source), Douglas-fir (Montana Seed Source), White fir
and Fraser fir (Mountain Home Nurseries)
- Trees that survive may be a future seed orchard
- Observe and evaluate survival
- Data collected will provide base-line data for NDSU researchers.
AGROFORESTRY DEMONSTRATION - FRUIT PRODUCTION
- Evaluate species survival
- Demonstration of use of 3 species in alternate planting design: Nannyberry Viburnum
(Lincoln-Oakes source), American cranberrybush (Lincoln-Oakes source), Juneberry (N.D.
Forest Service source)
- Evaluate weed barrier performance in tree/shrub establishment
EXISTING SPRUCE/PINE WINDBREAKS DEMONSTRATIONS ON WEST SIDE
- Weed control - Roundup control of perennial weed competition (bromegrass)
- Thinning and removal of suppressed, diseased and dead trees
- Evaluate tree establishment and survival of interplanted species in add on row Ohio
buckeye, Black walnut
- Demonstration of use of 2 species in alternate planting design - Ohio Buckeye (Lee
Nursery source), Black Walnut (Lincoln-Oakes source)
EXTENDED TREE ROW DEMONSTRATION
- Evaluate growth and time protection is achieved
- Evaluate establishment and survival on various weed barrier products
- Evaluate economic costs of the weed barrier products company installation, longevity and
- Evaluate use of 2 species per row design Douglas-fir (Denbigh Seed Source) and Siberian
Larch (ND Forest Service source) in weed barrier
Example of Alternative Thinning 8 - 10 Years AFter Planting
After thinning circled trees (rows 4, 6 and 8), 50:50 species diversification is left
in the row. A staggered design within the 3 rows is left, increasing growing space without
sacrificing density for wind protection.
Staggered win-row design (row 10) increases growing space without sacrificing density
for wind protection. As trees in staggered win-row grow into each other the whole circled
tree row can be removed without decreasing 50:50 species diversification left in adjacent
Reasons for understory planting:
- Start the next forest cover.
- Maintain ground level density to decrease potential weed competition.
- Take advantage of pine needle mulch for seedling establishment.
- Alternative tree crop: Christmas trees, transplant nursery, small timber, firewood
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