| Definition | Japanese fiscal year of sampling (from April to March). | Identification number of plot. | Alphanumeric code for plot. | Identification number of subplot in each plot. | Identification number of sampling occasion in each plot and fiscal year. | Date of trapping. | Abbreviated name of study site where the subsample is stored. | Dry weight of organic layer (grams par 625 square centimeters) | C content (weight %) of organic layer | N content (weight %) of organic layer | C-to-N ratio of organic layer | Japanese fiscal year of C and N measurement (from April to March). | Notes |
| Measurement Domain |
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| Def | Identification number of plot. |
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| Def | Alphanumeric code for plot. |
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| Def | 1-4: Regular four sampling occasions (normally, spring, early summer, early autumn and late autumn). a1, a2, ...: Additional sampling occasions |
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| Unit | gramsPerHectogram |
| Type | real |
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| Unit | gramsPerHectogram |
| Type | real |
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| Unit | dimensionless |
| Type | real |
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