Tree inventory data of P. menziesii var. menziesii (= viridis) (Schwerin) Franco in Pavari's Plot 412 ninty years after plantation.

This dataset containing the historical series of dendrometric data of a Douglas fir (P. menziesii var. menziesii (= viridis) (Schwerin) Franco) plantation. Implemented in 1932, the plantation is located in place “Rio di Mercurella”, in the Tyrrhenian coastal mountain range in Calabria (Southern Italy). The experimental plot has been identified as Plot 412 and its Google Earth’s coordinates are 39°20'11.55"N e 16° 4'49.40"E. The forest stand is characterized by trees with a relevant role for forest community biodiversity.

In 1940, the monitoring of this stand has been started. In this dataset, four of all inventories have been reported. Until 2013, these inventories have been carried out by Istituto Sperimentale di Selvicoltura and Unità di Ricerca per la Selvicoltura in Ambiente Mediterraneo, now incorporated in CREA Research centre of Forestry and Wood which has taken over the last two inventories.

90 years after is plantations, in Plot 412 a total analysis has been performed. The following data have been collected: position, number, Diameter at breast height (DBH) of all trees, total height (Ht) of a sample of trees. All data have been elaborated to determine the mean dendrometric parameters as basal area (BA) and Volume (V). Volume of tree was calculated using the local volume table elaborated by Avolio in 1987 and it was integrated with measurements to model trees by Avolio e Bernardini in period 1988-1996.

The data collected constitute a fundamental contribution to assess the health and stability of this forest stands. They represent an important historical source and evidence of first experimental test of the introduction of Douglas fir that must also be monitored in the future in Calabria.