beat up

In forestry, a beat up is a young tree planted to replace one that has failed to establish or died in a timber plantation. When seedlings or saplings are first planted at density, not all survive: frost, drought, disease, wildlife damage, and poor soil contact cause mortality rates of 5 to 15 percent in the first two years. Rather than accept gaps that reduce yield and allow weed competition, foresters return to the plantation in year two or three and fill these spaces with new trees, which are called beat ups.

The term comes from the old sense of beat meaning to traverse or patrol ground, reflecting the act of walking through the plantation to locate and fill blanks. A beat up must be carefully selected: it should be of similar size and species to the original crop, and planted in autumn or early spring to maximize establishment. Nursery stock for beat ups is often held back deliberately, kept in pots or lines so it is younger and smaller than the main crop at planting time; this allows the beat up to develop at roughly the same rate as surrounding trees despite starting later.

Beat ups are counted separately in forestry records and assessed in the years following replanting. A high beat-up requirement, say more than 15 percent, signals poor quality in the original planting stock, inadequate site preparation, or unsuitable species choice. Conversely, low beat-up rates indicate good establishment and are a sign of competent work. Beat-up survival itself is tracked, since a replanted tree may fail again if the original cause (such as shallow rooting zone or animal browse) was not addressed.

The economics of beat-up planting affect management decisions. The cost of labor, stock, and transport to replant scattered gaps must be weighed against the value of filling them. In marginal sites or where manual replanting is expensive relative to timber value, foresters may accept small permanent gaps rather than beat up. In contrast, high-value exotic species plantations and areas prone to animal damage are beaten up more carefully and comprehensively to maintain crop uniformity and protect investment.