. Un'analisi della Pennsylvania risorse forestali. Le foreste e la silvicoltura Pennsylvania; la gestione delle foreste in Pennsylvania. 4200. A causa del lieve calo nella foresta commerciali terreni mentre i volumi di legname sono state building, la per-acro delle variazioni di inventario sono ancora più dra- matic, specialmente quando esaminate dalla proprietà delle classi. Su terreni pubblici, crescita del volume delle scorte per acro scavalcato da 53 per- dimensioni dello stand Sawtimber pubblica 44 Poletimber 45 Germoglio-piantina 10 aree Nonstocked 1 Totale 100 cento tra indagini-da 1,184 a 1.809 piedi cubici. I proprietari privati ha avuto un molto più modesti di 15 percento di aumento-da 1,

• Collaboratore: Library Book Collection
• ID dell’immagine: RNH941
• Dimensioni dei file: 7,2 MB (147,4 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 1950 x 1282 px | 33 x 21,7 cm | 13 x 8,5 inches | 150dpi

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. An analysis of Pennsylvania's forest resources. Forests and forestry Pennsylvania; Forest management Pennsylvania. 4200. Because of the slight decline in commercial forest land while timber volumes were building, the per-acre inventory changes are even more dra- matic, especially when examined by ownership classes. On public lands, growing-stock volume per acre jumped by 53 per- Stand size Public Sawtimber 44 Poletimber 45 Sapling-seedling 10 Nonstocked areas 1 Total 100 cent between surveys—from 1, 184 to 1.808 cubic feet. The private owners had a much more modest 15-percent increase—from 1, 078 to 1, 243 cubic feet. The trend in stand-size distribu- tion of commercial forest land for these two ownership groups offers an explanation forthe differential vol- ume increases: Private - - Percent 61 44 44 32 32 31 7 22 23 — 22 100 100 100 Private ownerships had and have a much larger portion of their land in sapling-seedling and nonstocked stands. These low-volume stands have pulled down overall averages. Also, the stand-size distribution on the surface has changed little over 13 years. But what the balance really means is that the harvesting and other losses of sawtimber stands kept pace with the ingrowth from pole to sawtimber. Harvesting of these sawtimber stands reduced vol- ume buildups. The stand-size distribution on public lands is different from private lands. Harvesting did not keep up with the maturing stands. This al- lowed a sizeable increase in saw- timber stands and a resulting higher increase in volume. The increase of 7965 7978 7965 7978 24. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Powell, Douglas S; Considine, Thomas J. [Broomall, Pa. ] : United States Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station

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