¹⁴C ages and δ¹³C of sclerotium grains found in forest soils

Figures & data

Figure 1  Sclerotium grains collected from Myoko Asadaira soil.

Figure 2  Profile of Myoko Asadaira soil. KG-b, Koyaike ash-b; KG-c, Koyaike ash-c.

Table 1 14C ages determined using accelerator mass spectrometry

Sample				No. applied grains	Mean weight (mg/grain)	Mean diameter (mm)	C (%)	^14C-Age (bp)	Labo Code
No.	Material	Horizon/grain size	Weight (mg)
1	SG	1A/small	2.11	39	0.05	0.6	39.8	95 ± 40	MTC-05517
2	SG	1A/medium	2.84	4	0.71	1.4	49.5	180 ± 35	MTC-04230
3	SG	1A/large	3.14	1	3.14	3.0	44.5	240 ± 35	MTC-04231
4	SG	2A/small	2.98	43	0.07	0.6	42.8	305 ± 30	MTC-04715
5	SG	2A/medium	3.53	5	0.71	1.3	40.9	750 ± 35	MTC-04716
6	SG	2A/medium	2.84	4	0.71	1.4	37.5	1000 ± 95	MTC-03640
7	SG	2A/medium	4.46	5	0.89	1.3	44.8	370 ± 40	MTC-04232
8	SG	2A/medium	3.59	4	0.90	1.2	46.2	350 ± 50	MTC-04233
9	SG	2A/large	2.58	1	2.58	2.6	42.0	530 ± 95	MTC-03641
10	SG	3A/small	2.56	42	0.06	0.6	40.2	1095 ± 35	MTC-04717
11	SG	3A/medium	4.01	4	1.00	1.5	41.0	1165 ± 35	MTC-04718
12	SG	3A/medium	3.17	4	0.79	1.4	38.8	1200 ± 35	MTC-04227
13	SG	3A/large	2.43	1	2.43	3.2	42.5	1170 ± 90	MTC-03642
14	SG	3A/large	3.79	1	3.79	3.2	42.0	1020 ± 35	MTC-04228
15	HA	1A	3.37				47.7	−674 ± 89	MTC-05518
16	HA	2A	4.24				44.3	340 ± 45	MTC-05519
17	HA	3A	4.00				44.8	920 ± 50	MTC-05520
18	HAPg	3A	2.39				44.1	959 ± 37	MTC-06005
SG, sclerotium grain; HA, humic acid; HAPg, humic acid green fraction.

Figure 3  Distribution of 14C ages of sclerotium in the profile of Myoko Asadaira soil. KG-b, Koyaike ash-b; KG-c, Koyaike ash-c.

Figure 4  The relationship between 14C age and grain size obtained for the Myoko Asadaira profile.

Figure 5  The relationship between 14C ages of sclerotium grains and carbon content (%) measured using a CO2 pressure gauge in the process of graphite preparation.

Figure 6  (a) δ13C and (b) carbon content for Myoko Asadaira sclerotium grains measured using an isotopic ratio mass spectrometer.