. 2023 Feb 23;14:1135480. doi: 10.3389/fpls.2023.1135480

Table 1.

Radiocarbon analysis results for the two selected cross-sections of Neltuma alba.

TEST BATCH	TREE CODE	DENDROCHRONOLOGICAL CALENDAR DATES		RADIOCARBON DATA					CELLULOSE EXTRACTION DETAILS
		(t) Year when tree start growing austral spring -Schulman convention -	(t+1) Year when tree stop growing austral summer- fall.	Radiocarbon tree-ring results			F¹⁴C curve values (Hua et al., 2022) SH Zone 1-2		Wood (mg)	Cellulose (mg)	Extraction yield (%)
			(t+1) Year when tree stop growing austral summer- fall.	F¹⁴C	± 1σ	Expected year (t+1) ¹⁴C	Feb (t+1)	Average (GS) Oct (t) to Apr (t+1)	Wood (mg)	Cellulose (mg)	Extraction yield (%)
1^ST RUN	VTP01	1959	1960	0.9846	0.0019	t-5 (1954)	1.1942	1.1917	88.4	36.25	41.01
	VTP01	1963	1964	1.1190	0.0020	t-5 (1958)	1.6157	1.5996	103.5	40.14	38.78
	VTP01	1964	1965	1.1927	0.0031	t-5 (1959)	1.6683	1.6681	87.9	32.74	37.25
	VTP01	1967	1968	1.2860	0.0027	t-5 (1962)	1.5841	1.5865	73.7	29.04	39.40
	VTP01	1973	1974	1.5282	0.0028	t-5 (1968)	1.4577	1.4592	41.6	14.08	33.84
	VTP07	1961	1962	0.9738	0.0018	t-12 (1950)	1.2123	1.2118	97.6	31.79	32.57
	VTP07	1963	1964	0.9736	0.0019	t-12 (1952)	1.6157	1.5996	58.3	21.36	36.64
	VTP07	1967	1968	0.9991	0.0019	t-12 (1956)	1.5841	1.5865	97	32.38	33.38
	VTP07	1975	1976	1.5200	0.0028	t-12 (1964)	1.4001	1.4018	73.8	22.62	30.64
2^ND RUN	VTP01	1963	1964	1.5185	0.0021	match	1.4859	1.4633	48.4	17.4	35.9
	VTP07	1962	1963	1.3004	0.0020	match	1.3928	1.3753	44.6	13.5	30.3
	VTP07	1967	1968	1.5750	0.0023	match	1.5725	1.5752	34.4	11.2	32.4
EXTRA RUN	VTP05	1962	1963	1.2925	0.0018	match	1.3928	1.3753	22.1	5.797	26.2

The 1^st and 2^nd run indicate if the measurements were done before and after the wood anatomy analysis, respectively. The two dendrochronological calendar dates columns show the growing season of Neltuma alba, starting approximately in October (t, Schulman year) and stopping around April (t+1, Schulman year). Based on Hua et al., 2022 dataset, we applied a monthly adjustment of 0.1250 to each calendar year (t+1) corresponding to the middle of the rainy season of our site (i.e., February 15^th) to plot the tree-ring F¹⁴C over the SH ¹⁴C curves. The F¹⁴C values from the SH ¹⁴C curves Zone 1-2 are indicated for February 15th and for the average from October to April. Our F¹⁴C results include their standard deviation and the number of years offset in tree-ring F14C initially in relation to the SH ¹⁴C curves. Cellulose extraction details are also presented with the individual extraction yields. All post-bomb ¹⁴C results are shown as F¹⁴C signatures (Fraction Modern Carbon), as recommended in Reimer et al. (2004).