Density reduction in loblolly pine (Pinus taeda L.) stands to increase tree C assimilation: an approach with the dual δ13C and δ18O isotope signatures in needles

Table 1 Description of treatments applied at each of the three study sites

Planting density (stems ha⁻¹)	Planted spacing (m × m)	Thinning (% of density removal)	Treatment plot size (ha)	Measurement plot size (ha)	Drew site		Ashley site		Union site
Planting density (stems ha⁻¹)	Planted spacing (m × m)	Thinning (% of density removal)	Treatment plot size (ha)	Measurement plot size (ha)	Year of planting	Age of thinning	Year of planting	Age of thinning	Year of planting	Age of thinning
Unthinned treatments
494	4.7 × 4.2	0	0.22	0.08	2001	–	2002	–	2003	–
1111	2.9 × 3.0	0	0.11	0.04	2001	–	2002	–	2003	–
1729	1.9 × 3.0	0	0.10	0.04	2001	–	2002	–	2003	–
2346	1.2 × 2.4	0	0.10	0.04	2001	–	2002	–	2003	–
2964	1.4 × 2.4	0	0.09	0.04	2001	–	2002	–	2003	–
Thinned treatments
1111	2.9 × 3.0	55	0.11	0.04	2001	9	2002	9	2003	8
1729	1.9 × 3.0	71	0.10	0.04	2001	8	2002	8	2003	7
1729	1.9 × 3.0	36	0.10	0.04	2001	8	2002	8	2003	7

ISSN: 1297-966X