Average valuation indices of artificial pine forests within administrative areas

Administrative area	Average tax rate
	age, years	diameter, sm	height, m	relative completeness	stock, m3·ha-1
Volyn region	42	17.9	14.2	0.78	200
Zhytomyr	48	20.2	17.2	0.77	246
Kievskaya	50	21.3	17.7	0.80	274
Lviv	47	22.0	17.4	0.74	230
Rivne	41	17.3	14.4	0.74	188
Sumy	59	26.7	22.2	0.74	338
Khmelnitsky	51	23.4	18.9	0.79	290
Chernihiv	54	24.4	19.7	0.78	305
On average, within the region	47	20.6	17.0	0.77	246

Pinus sylvestris stands as main forest creating species in the pine forest, sub pine forests and sub oakery, where 21%, 63% and 16%, respectively, by area of ​​stands (table 1.3). It is a typical mesophyte under the condition of good moistening, but often enters the dry soils.

Table 1.3

Distribution of areas of artificial pine forests of Polissya region by types of forest vegetation conditions, ha

Typological categories	Pine forests	Sub Pine Forests	Sub oakery	Oakeries	Total
Very dry	349.3	–	–	–	349.3
Dry	39471.3	4644.0	–	–	44115.3
Fresh	199663.0	574786.0	129593.3	814.8	904856.5
Moist	13805.7	185887.0	72281.8	489.2	272463.5
Humid	1564.8	14296.0	1455.6	15.3	17331.7
Wet	154.3	719.7	83.9	0.6	958.5
Together	255008.0	780332.0	203414.6	1319.9	1240074.8

It is worth noting that pine woodlands occupy the largest area in fresh (73%) and moist (22%) forest conditions. The share of other conditions (very dry, dry, humid, wet) is slightly more than 5% of total area. The most widespread are fresh oak-pine forests (46%), fresh pine forests (16%), wet oak-pine forests (15%) and fresh hornbeam-oak-pine forests (10%). Other types of forest are less common.

Consequently, the substantive analysis of valuation indicators of artificial pine forests of the Ukrainian Polissya makes it possible to explore the dynamics of individual valuation indicators, and the peculiarities of their interrelationship, which will be used in modeling their productivity. Mainly, artificial pine forests of Polissya region are medieval (average age – 47 years), moderate (average relative completeness – 0.77) and medium productive (average stock 246 m³*ha^-1).