This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 Excerpt: ...where again m is the age of any one stand. 1. This leads to the formula:, rJ, _ (c + E-j-Sc) (1.Opr--I)--Ta(l.Opr-a--1.) q.v-, -("Gc per acre = ' ', 5--( be + h) r(1.op--1) 2. To illustrate: forest of 16,000 acres, clear cut, and plant; rotation, 80 years; p, 2%; premises per acre: Cost value of land, $10. Cost of ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 Excerpt: ...where again m is the age of any one stand. 1. This leads to the formula:, rJ, _ (c + E-j-Sc) (1.Opr--I)--Ta(l.Opr-a--1.) q.v-, -("Gc per acre = ' ', 5--( be + h) r(1.op--1) 2. To illustrate: forest of 16,000 acres, clear cut, and plant; rotation, 80 years; p, 2%; premises per acre: Cost value of land, $10. Cost of planting, $10. Current expense, Si.50, hence E, $75. Thinning at 20 years, no income. Thinning at 40 years, $10. Thinning at 60 years, $20. Then the average cost value of growing stock per acre: (1O4-75 + IO) (1.0250--I )--10(1.02"--I)--20(1.0210--1), r"N_tTOI 80(1.02--I) and for 16,000 acres about $2,096,000. 3. Simplification of this formula by substituting Se( 1.opr--1) for Sc(1.opr--1) results in the same form found for o--Ge so that: o-(r-OGc =-(r-I)Ge when Se is employed as the value of the land in place of Sc, or Ss. H. VALUE OF THE GROWING STOCK IN THE ALLAGED OR MANY-AGED FOREST. Two cases arise: the regulated and the irregular forest. a. The stand is truly all-aged and regular as in the case of a well managed selection forest. Here old and young are in proper proportion, all age classes are represented and occupy equal areas. The difference between the growing stock of this forest and that of a forest of even aged stands is merely in the distribution of old VALUE OF ALL-AGED STAND 71 and young on the ground. Theoretically at least, the following holds: if the rotation is 120 years, the area 3,600 acres, the period of return 20 years, so that each year 180 acres are cut over, each rotation one of the 180 acre lots contains six age classes, and on return the 3,600 acres all age classes, from 1--120 year old stuff, are represented, provided reproduction is secured promptly, as is here assumed. On each 180-acre lot the trees o...
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