| RecYear | RecYear | Physical quantity | Year of record |
| BLOCK | BLOCK | Nominal | The experiment contained 4 blocks |
| PLOT | PLOT | Physical quantity | The experiment consisted of 16 plots; plots 1, 3, 6, 8, 9, 10, 14 and 15 were used in this study. |
| SUBPLOT | SUBPLOT | Physical quantity | Each plot contained 12 subplots. |
| WPTRT | WPTRT | Nominal | Whole-plot heterogeneity treatment (maxhet and control) |
| DEPTH | DEPTH | Physical quantity | Two soil depth treatments were deep (=1) and shallow (=2). |
| NUTRIENT | NUTRIENT | Physical quantity | Three soil nutrient treatments were ambient (=1), enriched (=2), and reduced (=3). |
| TRTCOMB | TRTCOMB | Physical quantity | Indicates treatment combination resulting from the combination of soil depth and nutrient
manipulations (deep soil at ambient N = control, deep soil enriched with N = N; deep soil with
reduced N = C; shallow soil at ambient N = stone shallow soil enriched with N = stoneN, and shallow soil with reduced N = stoneC).
|
| RESTORE_YR | RESTORE_YR | Physical quantity | Growing season since restored from agriculture |
| ANPP | ANPP | Physical quantity | Aboveground annual net primary productivity (g/m2/y). |
| RESIN_NO3 | RESIN_NO3 | Physical quantity | Resin collected nitrate over the growing season (μg/bag). Values represent the average of two
bags/subplot; a period indicates missing data
|
| H | H | Physical quantity | Average subplot diversity (Shannon’s index); values are unit-less. |
| R | R | Physical quantity | Average subplot richness (number of species/0.5 m2) |
| ANGE | ANGE | Physical quantity | Andropogon gerardii Vitman |
| SCSC | SCSC | Physical quantity | Schizachyrium scoparium (Michx.) Nash (Michx.) Nash |
| BOCU | BOCU | Physical quantity | Bouteloua curtipendula (Michx.) Torr. |
| KOMA | KOMA | Physical quantity | Koeleria macrantha (Ledeb.) Schult. |
| PAV12 | PAV12 | Physical quantity | Panicum virgatum L. |
| SONU2 | SONU2 | Physical quantity | Sorghastrum nutans (L.) Nash |
| AMCA6 | AMCA6 | Physical quantity | Amorpha canescens Pursh |
| ARLU | ARLU | Physical quantity | Artemisia ludoviciana Nutt |
| ASVE | ASVE | Physical quantity | Asclepias verticillata L. |
| BAAU | BAAU | Physical quantity | Baptisia australis (L.) R. Br. |
| BABR2 | BABR2 | Physical quantity | Baptisia bracteata Muhl. ex Elliott |
| CAIN2 | CAIN2 | Physical quantity | Callirhoe involucrata (Torr. & A. Gray) A. Gray |
| DACA7 | DACA7 | Physical quantity | Dalea candida Michx. ex Willd. |
| DAPU5 | DAPU5 | Physical quantity | Dalea purpurea Vent. |
| DEIL | DEIL | Physical quantity | Desmanthus illinoensis (Michx.) MacMill. ex B.L. Rob. & Fernald |
| BREU | BREU | Physical quantity | Brickellia eupatorioides (L.) Shinners |
| LEDE | LEDE | Physical quantity | Lepidium densiflorum Schrad |
| LECA8 | LECA8 | Physical quantity | Lespedeza capitata Michx |
| LIPU | LIPU | Physical quantity | Liatris punctata Hook |
| OEMA | OEMA | Physical quantity | Oenothera macrocarpa Nutt |
| PSTE5 | PSTE5 | Physical quantity | Psoralidium tenuiflorum (Pursh) Rydb |
| RACO3 | RACO3 | Physical quantity | Ratibida columnifera (Nutt.) Woot. & Standl |
| ROAR3 | ROAR3 | Physical quantity | Rosa arkansana Porter |
| RUHU | RUHU | Physical quantity | Ruellia humilis Nutt |
| SAAZ | SAAZ | Physical quantity | Salvia azurea Michx. ex Lam |
| MINU6 | MINU6 | Physical quantity | Mimosa nuttallii (DC. ex Britton & Rose) B.L. Turner |
| SPAS | SPAS | Physical quantity | Sporobolus asper (P. Beauv.) Kunth |
| VEFA2 | VEFA2 | Physical quantity | Vernonia fasciculata Michx |
| UNWD | UNWD | Physical quantity | Unidentified woody species |
| UNLEG | UNLEG | Physical quantity | Unidentified legume |
| UNFB1 | UNFB1 | Physical quantity | Unidentified forb 1 (annual/perennial not known) |
| UNFB2 | UNFB2 | Physical quantity | Unidentified forb 2 (annual/perennial not known) |
| UNGR | UNGR | Physical quantity | Unidentified grass (C3/C4, annual/perennial unknown) |
| MANE | MANE | Physical quantity | Malva neglecta Wallr |
| ABTH | ABTH | Physical quantity | Abutilon theophrasti Medik |
| AMRE | AMRE | Physical quantity | Amaranthus retroflexus L |
| AMTU | AMTU | Physical quantity | Amaranthus tuberculatus (Moq.) Sauer |
| AMPS | AMPS | Physical quantity | Ambrosia psilostachyia DC |
| CHAL7 | CHAL7 | Physical quantity | Chenopodium album L |
| CUFO | CUFO | Physical quantity | Cucurbita foetidissima Kunth |
| COCA5 | COCA5 | Physical quantity | Conyza canadensis (L.) Cronquist |
| BASC5 | BASC5 | Physical quantity | Bassia scoparia (L.) A.J. Scott |
| MEOF | MEOF | Physical quantity | Melilotus officinalis (L.) Lam |
| GAAP2 | GAAP2 | Physical quantity | Galium aparine L |
| PHV15 | PHV15 | Physical quantity | Physalis virginiana Mill |
| PHAM4 | PHAM4 | Physical quantity | Phytolacca americana L |
| SORO | SORO | Physical quantity | Solanum rostratum Dunal |
| SYOR | SYOR | Physical quantity | Symphoricarpos orbiculatus Moench |
| VIAM | VIAM | Physical quantity | Vicia americana Muhl. ex Willd |
| BRIN2 | BRIN2 | Physical quantity | Bromus inermis Leyss |
| CYDA | CYDA | Physical quantity | Cynodon dactylon (L.) Pers |
| DISA | DISA | Physical quantity | Digitaria sanguinalis (L.) Scop |
| ECMU2 | ECMU2 | Physical quantity | Echinochloa muricata (P. Beauv.) Fernald |
| ELIN3 | ELIN3 | Physical quantity | Eleusine indica (L.) Gaertn |
| ERCI | ERCI | Physical quantity | Eragrosti cilianensis (All.) Vign. ex Janchen |
| UNFZG | UNFZG | Physical quantity | Unknown grass (described fuzzy) |
| PACA6 | PACA6 | Physical quantity | Panicum capillare L. |
| PADI | PADI | Physical quantity | Panicum dichotomiflorum Michx |
| UNPAN | UNPAN | Physical quantity | Panicum spp. (unidentified) |
| SEFA | SEFA | Physical quantity | Setaria faberi Herrm |
| SEPU8 | SEPU8 | Physical quantity | Setaria pumila (Poir.) Roem. & Schult |
| UNSET | UNSET | Physical quantity | Setaria spp. (unidentified) |
| UNC4G | UNC4G | Physical quantity | Unknown C4 grass |
| ASTU | ASTU | Physical quantity | Asclepias tuberosa L. |
| HEHE5 | HEHE5 | Physical quantity | Heliopsis helianthoides (L.) Sweet |
| MOFI | MOFI | Physical quantity | Monarda fistulosa L. |
| ACMI2 | ACMI2 | Physical quantity | Achillea millefolium L. |
| SYLA3 | SYLA3 | Physical quantity | Symphyotrichum laeve (L.) Á. Löve & D. Löve |
| DEIL2 | DEIL2 | Physical quantity | Desmodium illinoense A. Gray |
| EUAL3 | EUAL3 | Physical quantity | Eupatorium altissimum L. |
| TECA3 | TECA3 | Physical quantity | Teucrium canadense L. |
| TRBR | TRBR | Physical quantity | Tradescantia bracteata Small |
| UNSD | UNSD | Physical quantity | Unknown seedling |
| UNUC | UNUC | Physical quantity | Unknown unclassified |
| ASSY | ASSY | Physical quantity | Asclepias syriaca L. |
| UNMAL | UNMAL | Physical quantity | Unknown nightshade (Malvaceae) |
| UNFRAG | UNFRAG | Physical quantity | Fragaria spp. (unidentified) |
| MESA | MESA | Physical quantity | Medicago sativa L. |
| TAOF | TAOF | Physical quantity | Taraxacum officinale F.H. Wigg. |
| TRRE3 | TRRE3 | Physical quantity | Trifolium repens L. |
| SYERE | | Physical quantity | Symphyotrichum ericoides (L.) G.L. Nesom var. ericoides |
| ECAN2 | | Physical quantity | Echinacea angustifolia DC. |
| TRPE4 | | Physical quantity | Triodanis perfoliata (L.) Nieuwl. |