| RecYear | | Physical quantity | Year of record |
| Obs | | Physical quantity | Observation number |
| SAMPLE | | Physical quantity | SAMPLE ID |
| Burn | | Code list | Burn type (0-unburn;1-burn) |
| Mow | | Code list | Mow type (0-unmow;1-mow) |
| N | | Code list | nitrogen treatment (0-untreatment;1-treatment) |
| P | | Code list | Phosphorus treatment (0-untreatment;1-treatment) |
| BLK | | Physical quantity | Block number of plots |
| TOTAL_NEMATODES | | Physical quantity | Total nematodes counts (per 100 grams) |
| HOPLOLAIMIDAE | | Physical quantity | Relative abundances of Hoplolaimidae |
| TELOTYLENCHIDAE | | Physical quantity | Relative abundances of Telotylenchidae |
| PARATYLENCHIDAE | | Physical quantity | Relative abundances of Paratylenchidae |
| CRICONEMATIDAE | | Physical quantity | Relative abundances of Criconematidae |
| PRATYLENCHIDAE | | Physical quantity | Relative abundances of Pratylenchidae |
| MELOIDOGYNIDAE | | Physical quantity | Relative abundances of Meloidogynidae |
| HETERODERIDAE | | Physical quantity | Relative abundances of Heteroderidae |
| XIPHINEMATIDAE | | Physical quantity | Relative abundances of Xiphinematidae |
| TYLENCHIDAE | | Physical quantity | Relative abundances of Tylenchidae |
| TRICHODORIDAE | | Physical quantity | Relative abundances of Trichodoridae |
| ANGUINIDAE | | Physical quantity | Relative abundances of Anguinidae |
| APHELENCHIDAE | | Physical quantity | Relative abundances of Aphelenchidae |
| APHELENCHOIDIDAE | | Physical quantity | Relative abundances of Aphelenchoididae |
| RHABDITIDAE | | Physical quantity | Relative abundances of RHABDITIDAE |
| CEPHALOBIDAE | | Physical quantity | The relative abundances of Cephalobidae |
| PANAGROLAIMIDAE | | Physical quantity | The relative abundances of Panagrolaimidae |
| PLECTIDAE | | Physical quantity | The relative abundances of Plectidae |
| MISCMICROBIVORES | | Physical quantity | The relative abundances of MiscMicrobivores |
| PRISMATOLAIMIDAE | | Physical quantity | The relative abundances of Prismatolaimidae |
| DORYLAIMOIDEA | | Physical quantity | Relative abundances of Dorylaimoidea |
| BELONDIROIDEA | | Physical quantity | The relative abundances of Belondiroidea |
| TYLENCHOLAIMOIDEA | | Physical quantity | Relative abundances of Tylencholaimoidea |
| MONONCHIDA | | Physical quantity | Relative abundances of Mononchida |
| DIPTHEROPHOROIDEA | | Physical quantity | Relative abundances of Diptherophoroidea |