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Supplemental
planting
Supplemental
planting is the addition of one or more rows to an existing windbreak. This technique is often used
where an older windbreak is in decline, but continued protection is
desired. New trees can establish for several years before the older trees
are removed. Another common use for supplemental planting is when a
farmstead shelterbelt does not provide enough protection in the winter, and
increased density is desired. New rows are often added to the outside of the existing
windbreak (Figure 3-2), or to the inside of a multi-row windbreak, where one
or more rows have been removed (Figure 3-3).
Figure 3-2. New
rows planted to the outside of an existing windbreak. The new trees and
shrubs were planted as the older trees are starting to fail, but have not
completely died, thus providing continuous protection. Photo by Joe
Zeleznik, near Horace, N.D.

Figure 3-3. New
rows planted on the inside of an existing windbreak. The new trees were
planted before the older trees have completely died, thus providing
continuous protection. Photo by Joe Zeleznik, near Thompson, N.D.

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