Table 4. Age structure of P. euphratica at the sites investigated in the fourth observation.

Plot No.	Plot size (m2)	Density (100 m−2)	Mean age (yr)	SD	CV (%)
1	467.5	38	18.1	3.6	20.02
2	568.3	132	5.1	0.3	6.41
3	1490.6	8	11.9	2.2	18.29
4	1866.9	52	15.1	3.7	24.53
5	1658.6	48	12.9	3.2	24.89
6	412.4	36	14.6	2.0	14.02
7	274.6	40	18.4	3.5	19.23
8	1076.1	28	16.1	2.7	16.52
9	592.0	44	17.2	3.2	18.53
10	358.3	32	16.7	2.9	17.36
11	398.5	52	16.6	2.9	17.53
12	413.6	32	16.2	2.8	17.59
13	304.4	32	17.4	2.8	16.27
14	711.6	44	16.9	2.3	13.89
15	531.5	24	17.8	3.4	18.88
16	287.2	48	14.1	3.0	21.34
17	146.6	60	11.4	1.7	15.36
18	508.4	28	19.2	2.6	13.31
19	1489.6	32	15.7	2.0	12.68
20	798.3	32	16.9	3.1	18.34

SD is standard deviation, and CV is coefficient of variation.