Net growth generally increases with age and as site productivity class increases, but at more than 100 years, growth clearly begins to decline. PF Olsen managed the harvesting of Kevin’s two forestry blocks in late 2016. (e.g., 5 tons per acre per year), nor is there a constant percentage growth (e.g., 8 percent per year). USDA Forest Service data shows the net growth in board feet per acre per year for different age classes and different site productivity classes averaged across all timberland in Pennsylvania (Table 2). Planting density is lower than for willow, typically 10-12,000 per ha. Average yield on a suitable site is likely to be in the region of8 oven dry tonnes per hectare per year. The product ratio within the stand is 2/3 pulpwood trees and 1/3 chip-n-saw. Assuming $7 per ton for pulpwood and $15 for chip-n-saw, the annual value growth for the existing 450 trees per acre is $31.86/acre/year. Yield Class: This is defined as the potential growth rate or yield of a forest, expressed as cubic meter per hectare per year (m3/ha/yr). Nt = N t-1 e-(0.39318S At-10.93042Nt-1/107, where N = trees per acre, T = time, A = stand age, S = site index (Ek and Brodie 1975)Average dominant height. If you can harvest 100 bales per acre and receive $1.00 per bale, that would amount to $100.00 per acre of additional revenue in years 8, 10, 12, and 14 (Figure 16). "If a landowner does all the work on five acres, yields 100 bales per acre and wholesales the straw for $3 per bale, those five acres could yield $1,500 per year." Cut back takes place late in the following winter. For example, a well-stocked pine stand might have a basal area of 80 to 120 square feet per acre. Assume that you can reasonably expect to rake pine straw from your forest every other year between year 8 and year 15 when the first thinning occurs. Merchantable Volume (Yield) Curve for Loblolly Pine, Hypothetical Stand 0 20 40 60 80 100 120 140 160 180 200 0 5 10 15 20 25 30 35 40 Tons Per Acre Stand Age Source: Forest … Harvesting The stand is growing at 3.3 tons per acre per year (1.25 cords/acre volume growth potential). SWS Forestry prefer the higher YC i.e. 22-24 m3/ha/yr Figure 1. When displaying a yield table, the values for number of trees, basal area and volume are normally expressed for a stand area of one hectare so that they represent per-hectare results. The premium of €173 per acre over 20 years is worth €69,200 in the lifetime of the crop. Yield is very site dependent, and in some sites can out perform willow. For example, the basal area of a tree that measures 14 inches in diameter at breast height is about 1 square foot. Like thinnings, clearcut values per acre for timber in the higher-value age classes all decreased in 2019, also a sign that supply outstripped demand. Yield. Thinning values per acre for CNS and small sawtimber in the 16-25 age classes were up in 2018 but dropped markedly in 2019—a sign that supply of these products outpaced demand in that year. (b) The sum basal areas of the individual trees within 1 acre of forest. H = S(1.46 - 1.4337e-0.0227A), where H = average dominant height, S = site index, A = stand age (Lundgren and Dolid 1970)Stand basal area. 22-24 m3/ha/yr SWS Forestry prefer the higher YC i.e. Total number of trees per acre ≥ 1.0 ft tall. It is possible for landowners with pine stands in the right condition and location to make $150 or more per acre per year by selling the pine needles for mulch," Hatcher said. The initial stocking was 1,000 stems per hectare and timely silviculture resulted in a high-pruned stand at about 350 stems per hectare at maturity. However, a different stand area can be specified in Forest Yield if required, in which case, values will be displayed that relate to the specified area. 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