|  | 300 ppm | 600 ppm | 900 ppm | 
	
		| Plant Name | Number of Studies
 | Arithmetic Mean
 | Standard Error
 | Number of Studies
 | Arithmetic Mean
 | Standard Error
 | Number of Studies
 | Arithmetic Mean
 | Standard Error
 | 
	| Snow Gum Tree [Eucalyptus pauciflora] | 10 | 67.1% | 9.5% |  |  |  |  |  |  | 
| Saccharina latissima [Sugar Kelp] |  |  |  |  |  |  | 2 | -32% | 14.1% | 
| Saccharum officinarum [Sugarcane] | 13 | 35.7% | 5.7% |  |  |  |  |  |  | 
| Safflower [Carthamus tinctorius] |  |  |  | 1 | 43% | 0% |  |  |  | 
| Sage [Salvia officinalis] | 2 | 21% | 11.3% |  |  |  |  |  |  | 
| Sagebrush, Big [Artemisia tridentata] | 4 | 24.3% | 6.1% |  |  |  |  |  |  | 
| Sage, Pitcher [Salvia pitcheri] | 2 | 25.5% | 2.5% |  |  |  |  |  |  | 
| Sago Palm [Cycas revoluta] | 1 | 172% | 0% |  |  |  |  |  |  | 
| Sainfoin [Onobrychis viciaefolia] | 1 | 21% | 0% |  |  |  |  |  |  | 
| Saintpaulia ionantha [African Violet] |  |  |  | 10 | 73.3% | 10.8% |  |  |  | 
| Salicornia ramosissima [Twiggy Glasswort] | 3 | 5.7% | 7.1% |  |  |  |  |  |  | 
| Salix jiangsuensis [Willow] | 5 | 25.8% | 5.9% |  |  |  |  |  |  | 
| Salix myrsinifolia [Dark Leaved Willow] | 8 | 70.8% | 13.7% |  |  |  |  |  |  | 
| Salt Marsh Rush [Juncus kraussii] | 2 | 720% | 144.2% |  |  |  |  |  |  | 
| Salvation Jane [Echium plantagineum] | 4 | 15.8% | 6.2% |  |  |  |  |  |  | 
| Salvia officinalis [Sage] | 2 | 21% | 11.3% |  |  |  |  |  |  | 
| Salvia pitcheri [Pitcher Sage] | 2 | 25.5% | 2.5% |  |  |  |  |  |  | 
| Sand Sedge [Carex arenaria] | 1 | 26% | 0% |  |  |  |  |  |  | 
| Sanguisorba minor [Small Burnet] | 6 | 81.2% | 15.2% |  |  |  |  |  |  | 
| Scallion [Allium fistulosum] | 1 | 135% | 0% |  |  |  |  |  |  | 
| Scandinavian Small Reed [Calamagrostis purpurea] | 2 | 18% | 7.8% |  |  |  |  |  |  | 
| Scenedesmus acutus[Unicellular Alga] |  |  |  |  |  |  | 1 | 350% | 0% | 
| Schedonorus arundinaceus [Tall Fescue] | 2 | 47% | 37.5% |  |  |  |  |  |  | 
| Schefflera actinophylla [Queensland Umbrella Tree] | 1 | 30% | 0% |  |  |  |  |  |  | 
| Schima superba[Subtropical Tree] | 2 | 27.5% | 11% |  |  |  |  |  |  | 
| Schizachyrium scoparium [Little Bluestem] | 9 | 18.2% | 9% |  |  |  |  |  |  | 
| Schoenoplectus americanus [Chairmaker's Bulrush] | 1 | 27% | 0% |  |  |  |  |  |  | 
| Scindapsus aureus [Pothos] | 1 | 39% | 0% | 1 | 61% | 0% | 1 | 73% | 0% | 
| Scirpus lacustris [Softstem Bulrush] | 1 | -2% | 0% |  |  |  |  |  |  | 
| Scirpus olneyi [Salt Marsh Sedge] | 10 | 17.4% | 7.7% |  |  |  |  |  |  | 
| Scutellaria barbata [Barbed Skullcap] |  |  |  |  |  |  | 1 | 61% | 0% | 
| Scutellaria lateriflora [Blue Skullcap] |  |  |  |  |  |  | 1 | 50% | 0% | 
| Seaweed [Lomentaria articulata] | 1 | 269% | 0% |  |  |  |  |  |  | 
| Secale cereale [Rye] | 4 | 33.5% | 5.6% |  |  |  |  |  |  | 
| Sedge, Beaked [Carex rostrata] | 1 | 44% | 0% |  |  |  |  |  |  | 
| Sedge, Bigelow's [Carex bigelowii] | 1 | 0% | 0% |  |  |  |  |  |  | 
| Sedge, Heath [Carex flacca] | 5 | 73.8% | 18.2% |  |  |  |  |  |  | 
| Sedge, Salt Marsh [Scirpus olneyi] | 10 | 17.4% | 7.7% |  |  |  |  |  |  | 
| Sedum alfredii [Perennial Herb] | 9 | 43.1% | 12.9% |  |  |  |  |  |  | 
| Selenicereus megalanthus [Yellow Pitaya] |  |  |  | 1 | 66% | 0% |  |  |  | 
| Selfheal [Prunella vulgaris] | 2 | 78% | 17.7% |  |  |  |  |  |  | 
| Selliera radicans [Remuremu] | 2 | 302% | 43.1% |  |  |  |  |  |  | 
| Senecio jacobea [Ragwort] | 1 | 21% | 0% |  |  |  |  |  |  | 
| Senecio vulgaris [Common Groundsel] | 2 | 66% | 25.5% |  |  |  |  |  |  | 
| Sesbania vesicaria [Bagpod] | 1 | 60% | 0% |  |  |  |  |  |  | 
| Setaria incrassata [Purple Pigeon Grass] | 1 | 6% | 0% |  |  |  |  |  |  | 
| Setaria italica [Foxtail Millet] | 2 | 33.5% | 9.5% |  |  |  |  |  |  | 
| Setaria glauca [Yellow Bristle Grass] | 1 | 16% | 0% |  |  |  |  |  |  | 
| Seteria faberi [Japanese Bristlegrass] | 5 | 18.8% | 6.7% | 1 | 25% | 0% |  |  |  | 
| Seteria viridis [Green Bristlegrass] | 4 | 16% | 0.8% |  |  |  |  |  |  | 
| Sheep Sorrel, Common [Rumex acetosella] | 2 | 24% | 2.1% |  |  |  |  |  |  | 
| Shorea leprosula | 2 | 38.5% | 11% |  |  |  |  |  |  | 
| Silene cretica in mixed stands with Silene cretica [Common Flax] | 2 | 98.5% | 17.3% |  |  |  |  |  |  | 
| Silene latifolia [White Campion] | 6 | 43.5% | 9% |  |  |  |  |  |  | 
| Silene noctiflora [Night-flowering Catchfly] | 1 | 44% | 0% |  |  |  |  |  |  | 
| Silver Vase Bromeliad [Aechmea fasciata] | 5 | 26.2% | 14.9% |  |  |  |  |  |  | 
| Sinapis arvensis [Wild Mustard] | 2 | 13.5% | 3.2% |  |  |  | 1 | 4% | 0% | 
| Sinapis alba [White Mustard] | 4 | 21.3% | 4.1% |  |  |  | 1 | 29% | 0% | 
| Six Perennial Species [Grassland community in antwerp, belgium] | 1 | 48% | 0% |  |  |  |  |  |  | 
| Sleepingplant [Cassia fasciculata] | 2 | 17.5% | 27.2% |  |  |  |  |  |  | 
| Smartweed, Pennsylvania [Polygonum pensylvanicum] | 3 | 55.7% | 1.8% |  |  |  | 2 | 127% | 15.6% | 
| Smut Grass [Sporobolus indicus] | 1 | -5% | 0% |  |  |  |  |  |  | 
| Soft Rush [Juncus effuses] | 1 | -5% | 0% |  |  |  |  |  |  | 
| Softstem Bulrush [Scirpus lacustris] | 1 | -2% | 0% |  |  |  |  |  |  | 
| Solanum viarum [Tropical Soda Apple] | 1 | 39% | 0% |  |  |  |  |  |  | 
| Solanum curtilobum [Shortlobe Solanum] | 2 | 63% | 5.7% |  |  |  |  |  |  | 
| Solanum dulcamara [Climbing Nightshade] | 10 | 46.5% | 9.3% |  |  |  |  |  |  | 
| Solanum lycopersicum [Tomato] | 8 | 70.3% | 19.7% | 2 | 53.5% | 23.7% | 1 | 48% | 0% | 
| Solanum melongena [Eggplant] | 1 | 41% | 0% |  |  |  |  |  |  | 
| Solanum muricatum [Pepino] | 4 | 69.8% | 20.5% | 4 | 135.8% | 43.4% |  |  |  | 
| Solanum, Shortlobe [Solanum curtilobum] | 2 | 63% | 5.7% |  |  |  |  |  |  | 
| Solanum tuberosum [White Potato] | 56 | 36.9% | 3.5% | 17 | 59.6% | 9% | 1 | 71% | 0% | 
| Solidago canadensis [Canadian Goldenrod] | 2 | 1750% | 1237.4% |  |  |  |  |  |  | 
| Solidago rigida [Stiff Goldenrod] | 1 | 27% | 0% |  |  |  |  |  |  | 
| Sorghastrum nutans [Yellow Indian Grass] | 5 | 194.6% | 103.8% |  |  |  |  |  |  | 
| Sorghum Hybrid [Sorghum vulgare x sorghum vulgare var. sudanense] |  |  |  | 8 | 67.1% | 16.5% |  |  |  | 
| Sorghum vulgare x sorghum vulgare var. sudanense [Sorghum Hybrid] |  |  |  | 8 | 67.1% | 16.5% |  |  |  | 
| Sorghum bicolor [Sorghum] | 34 | 19% | 2.9% | 1 | 41% | 0% |  |  |  | 
| Sorghum halepense [Johnsongrass] | 3 | -13% | 14.3% |  |  |  |  |  |  | 
| Sorghum [Sorghum bicolor] | 34 | 19% | 2.9% | 1 | 41% | 0% |  |  |  | 
| Sorghum sudanense [Sudan Grass] | 1 | 14% | 0% |  |  |  |  |  |  | 
| Sour Orange Tree [Citrus aurantium] | 5 | 69.4% | 9.1% |  |  |  |  |  |  | 
| Soybean [Glycine max] | 290 | 47.9% | 2.2% | 29 | 70.7% | 7.1% | 7 | 80.9% | 8.9% | 
| Spartina densiflora [Dense Flowered Cordgrass] | 3 | 24.3% | 12.4% |  |  |  |  |  |  | 
| Spartina alterniflora [Smooth Cordgrass] | 2 | 0% | 0% |  |  |  |  |  |  | 
| Spartina anglica [Common Cordgrass] | 3 | 19% | 25.1% |  |  |  |  |  |  | 
| Spathiphyllum [Peace Lily] |  |  |  | 1 | 59% | 0% |  |  |  | 
| Spergula arvensis [Corn Spurrey] | 2 | -20% | 7.8% |  |  |  |  |  |  | 
| Sphagnum capillifolium [Red Bogmoss] | 1 | 76% | 0% |  |  |  |  |  |  | 
| Sphagnum fallax [Flat-topped Bogmoss] | 1 | 98% | 0% |  |  |  |  |  |  | 
| Sphagnum cuspidatum [Toothed Sphagnum] | 1 | 42% | 0% | 1 | 266% | 0% |  |  |  | 
| Sphagnum magellanicum [Magellan's Sphagnum] | 1 | 26% | 0% |  |  |  |  |  |  | 
| Sphagnum, Magellan's [Sphagnum magellanicum] | 1 | 26% | 0% |  |  |  |  |  |  | 
| Sphagnum, Papillose [Sphagnum papillosum] | 3 | 49% | 6.9% |  |  |  |  |  |  | 
| Sphagnum papillosum [Papillose Sphagnum] | 3 | 49% | 6.9% |  |  |  |  |  |  | 
| Sphagnum, Recurved [Sphagnum recurvum] | 4 | 12.3% | 7% |  |  |  |  |  |  | 
| Sphagnum recurvum [Recurved Sphagnum] | 4 | 12.3% | 7% |  |  |  |  |  |  | 
| Sphagnum, Toothed [Sphagnum cuspidatum] | 1 | 42% | 0% | 1 | 266% | 0% |  |  |  | 
| Spider Lily [Hymenocallis littoralis] | 2 | 52% | 2.8% |  |  |  |  |  |  | 
| Spinach [Spinacia oleracea] | 4 | 29.5% | 6.2% | 1 | 70% | 0% | 1 | 118% | 0% | 
| Spinacia oleracea [Spinach] | 4 | 29.5% | 6.2% | 1 | 70% | 0% | 1 | 118% | 0% | 
| Sporobolus indicus [Smut Grass] | 1 | -5% | 0% |  |  |  |  |  |  | 
| Sporobolus pyramidalis [Whorled Dropseed] | 6 | 33.5% | 21.7% |  |  |  |  |  |  | 
| Spring Avens [Geum vernum] | 2 | 35.5% | 3.2% |  |  |  |  |  |  | 
| Spring Vetch [Vicia lathyroides] | 1 | 114% | 0% |  |  |  |  |  |  | 
| Spruce, Black [Picea mariana] | 18 | 36.1% | 10.1% |  |  |  |  |  |  | 
| Spruce, Norway [Picea abies] | 15 | 33.5% | 4.9% |  |  |  | 4 | 42.8% | 5.6% | 
| Spruce [Picea koraiensis] | 7 | 37.9% | 8.7% |  |  |  |  |  |  | 
| Spruce, Red [Picea rubens] | 1 | 15% | 0% |  |  |  | 3 | 41.7% | 10.6% | 
| Spruce, Sitka [Picea sitchensis] | 7 | 20.7% | 5% |  |  |  |  |  |  | 
| Spruce, White [Picea glauca] | 7 | 106.1% | 52.4% |  |  |  |  |  |  | 
| Spurrey, Corn [Spergula arvensis] | 2 | -20% | 7.8% |  |  |  |  |  |  | 
| Squash, Summer [Cucurbita pepo] |  |  |  | 1 | 83% | 0% |  |  |  | 
| Stalkgrass, Broad [Pharus latifolius] | 1 | 144% | 0% |  |  |  |  |  |  | 
| Sticky Snakeroot [Eupatorium adenophorum] | 5 | 27.4% | 4.5% |  |  |  |  |  |  | 
| Stilted Mangrove [Rhizophora stylosa] | 2 | 39% | 2.1% |  |  |  |  |  |  | 
| Stipa baicalensis [C3 Grass] | 5 | 105% | 21.5% |  |  |  |  |  |  | 
| Stipa grandis [Needlegrass] | 1 | 30% | 0% |  |  |  |  |  |  | 
| Stipa krylovii [Needlegrass] | 2 | 38.5% | 1.8% |  |  |  |  |  |  | 
| Stipa thurberiana [Thurber Needlegrass] | 1 | 11% | 0% |  |  |  |  |  |  | 
| St. John's Wort [Hypericum perforatum] | 12 | 39.7% | 10.2% | 1 | 107% | 0% | 3 | 32% | 0% | 
| Strawberry, Hybrid [Fragaria x ananassa] | 4 | 42.8% | 13.1% | 4 | 63% | 12.3% |  |  |  | 
| Striga hermonthica [Purple Witchweed] | 1 | -65% | 0% |  |  |  |  |  |  | 
| Stylosanthes capitata [Capitata] | 2 | 46.5% | 21.6% |  |  |  |  |  |  | 
| Stylosanthes hamata [Pencil Flower] | 1 | 18% | 0% |  |  |  |  |  |  | 
| Stylosanthes scabra [Pencilflower] | 2 | 72% | 10.6% |  |  |  |  |  |  | 
| Subterranean Clover [Trifolium subterraneum] | 1 | 756% | 0% |  |  |  |  |  |  | 
| Sugar Kelp [Saccharina latissima] |  |  |  |  |  |  | 2 | -32% | 14.1% | 
| Sugarcane [Saccharum officinarum] | 13 | 35.7% | 5.7% |  |  |  |  |  |  | 
| Sugargum [Eucalyptus cladocalyx] | 2 | 87.5% | 9.5% |  |  |  |  |  |  | 
| Sunflower [Helianthus annus] | 31 | 42.5% | 4.7% | 4 | 31.8% | 14.6% | 5 | 70.2% | 27.4% | 
| Sunn Hemp [Crotalaria juncea] | 2 | 45% | 9.9% |  |  |  |  |  |  | 
| Sweet Pepper [Capsicum annuum] | 13 | 30.2% | 7.1% |  |  |  |  |  |  | 
| Sweet Thorn [Acacia karroo] | 3 | 53.7% | 5.9% |  |  |  |  |  |  | 
| Sweetgum [Liquidambar styraciflua] | 20 | 132.4% | 23.5% |  |  |  |  |  |  | 
| Sweet Orange Tree [Citrus sinensis] | 2 | 38.5% | 4.6% |  |  |  |  |  |  | 
| Sweet Vernal Grass [Anthoxanthum odoratum] | 1 | 170% | 0% |  |  |  |  |  |  | 
| Switchgrass [Panicum virgatum] | 1 | -1% | 0% |  |  |  |  |  |  | 
| Swordfern, Boston [Nephrolepis exaltata] |  |  |  | 2 | 29% | 3.5% | 1 | 7% | 0% | 
| Sycamore [Acer pseudoplatanus] | 3 | 34.3% | 12.8% |  |  |  |  |  |  | 
| Sydney Blue Gum [Eucalyptus saligna] | 4 | 139.5% | 46.8% |  |  |  |  |  |  | 
| Symphiocarpos orbiculatus [Buck Brush] | 2 | 98.5% | 42.1% |  |  |  |  |  |  | 
| Syracosphaera pulchra [Marine Coccolithophore] | 2 | 9% | 2.8% |  |  |  |  |  |  |