5 Table T5 – Growing stock

5.1 FRA 2005 Categories and definitions

Category	Definition
Growing stock	Volume over bark of all living trees more than X cm in diameter at breast height (or above buttress if these are higher). Includes the stem from ground level or stump height up to a top diameter of Y cm, and may also include branches to a minimum diameter of W cm.
Commercial growing stock	The part of the growing stock of species that are considered as commercial or potentially commercial under current market conditions, and with a diameter at breast height of Z cm or more.

5.2 National data

5.2.1 Data sources

References to sources of information	Quality (H/M/L)	Variable(s)	Year(s)	Additional comments
Ministero dell’Agricoltura e delle Foreste-ISAFA. 1988. Inventario Forestale Nazionale. Sintesi metodologica e risultati.	H	Growing stock; Commercial growing stock	1985

5.2.2 Classification and definitions

The volume was calculated starting from a minimum diameter of 2.5 cm at breast height. The volume for conifers others than pines was calculated for the entire stem including branches and top, while the formulas used to estimate the volume for broadleaves and pines with expanded crown included the stem and branches (excluding twigs with diameter less than 3 cm).

Since no data was given for Commercial growing stock, this was assumed to be equal to the Growing stock by considering that trees with small diameters may be potentially marketable for fuel wood.

5.2.3 Original data

Volume min diam>2.5 cm	Area	Vol/ha (m3/ha)	Vol tot (m3)
High forest	1 924 200	211	406 006 200
Coppice	2 803 500	115	322 402 500
Specialized forest	117 000	95	11 115 000
Tot	4 844 700		739 523 700
m3/ha		153

5.3 Analysis and processing of national data

5.3.1 Calibration

No calibration was necessary.

5.3.2 Estimation and forecasting

Estimations for 1990, 2000 and forecasting for 2005 were possible by assuming that volume per hectare was constant throughout the years and by multiplying the mean value by the forest areas of 1990, 2000 and 2005 indicated in T1.

For the Commercial growing stock, the estimated forest area under protection was excluded from the calculations of the total growing stock. For this reason, since the total Protected forest area was available for 2000 and it was not possible to estimate or predict the Protected forest for 1990 and 2005, only the Commercial growing stock was estimated for 2000.

5.4 Reclassification into FRA 2005 classes

Table: Reclassification (Percentage allocation) into FRA 2005 classes

National Classification	% of a National Class belonging to a FRA Class
	Growing Stock	Commercial Growing Stock
Volume minimum diam>2.5 cm6	100	100

5.5 Data for National reporting table T5

FRA 2005 Categories	Volume (million cubic meters over bark)
	Forest			Other wooded land
	1990	2000	2005	1990	2000	2005
Growing stock	1 188	1 329	1 400	na	na	na
Commercial growing stock	n.a.	1 054	n.a.	na	na	na

Specification of country threshold values	Unit	Value	Complementary information
1. Minimum diameter at breast height of trees included in Growing stock (X)	cm	2.5
2. Minimum diameter at the top end of stem (Y) for calculation of Growing stock	cm	37
3. Minimum diameter of branches included in Commercial Growing stock (W)	cm	-
4. Minimum diameter at breast height of trees in Commercial growing stock (Z)	cm	2.5
5. Volume refers to “Above ground” (AG) or “Above stump” (AS)	AG / AS	AS
6. Have any of the above thresholds (points 1 to 4) changed since 1990	Yes/No
7. If yes, then attach a separate note giving details of the change	Attachment

5.6 Comments to National reporting table T5

⁶ This is also equal to Commercial growing stock.
⁷ For broadleaves and conifers with expanded crowns. Volume for other conifers was calculated up to the top of the trees.