- silicon atomPositive and negative results21 papers: 19 positive, 2 negative or no effect
- iron atomPositive and negative results12 papers: 8 positive, 4 negative or no effect
- calcium atomPositive and negative results10 papers: 8 positive, 2 negative or no effect
- zinc atomPositive and negative results10 papers: 6 positive, 4 negative or no effect
- cadmium atomPositive and negative results8 papers: 2 positive, 6 negative or no effect
- sodium chloridePositive and negative results8 papers: 1 positive, 7 negative or no effect
- manganese atomPositive and negative results7 papers: 4 positive, 3 negative or no effect
- (2-chloroethyl)phosphonic acidPositive and negative results5 papers: 4 positive, 1 negative or no effect
- iron(3+)Positive and negative results5 papers: 4 positive, 1 negative or no effect
- magnesium atomPositive and negative results4 papers: 2 positive, 2 negative or no effect
- nickel atomPositive and negative results4 papers: 1 positive, 3 negative or no effect
- calcium(2+)Positive and negative results3 papers: 2 positive, 1 negative or no effect
- copper(2+)Positive and negative results3 papers: 1 positive, 2 negative or no effect
- lead atomPositive and negative results3 papers: 1 positive, 2 negative or no effect
- sodium atomPositive and negative results3 papers: 2 positive, 1 negative or no effect
- fullerenePositive and negative results2 papers: 1 positive, 1 negative or no effect
- molybdenum atomPositive and negative results2 papers: 1 positive, 1 negative or no effect
- zinc oxidePositive and negative results2 papers: 1 positive, 1 negative or no effect
- copper atomResults agree6 papers: 0 positive, 6 negative or no effect
- selenium atomResults agree6 papers: 6 positive, 0 negative or no effect
- 24-epi-brassinolideResults agree5 papers: 5 positive, 0 negative or no effect
- melatoninResults agree4 papers: 4 positive, 0 negative or no effect
- salicylic acidResults agree4 papers: 4 positive, 0 negative or no effect
- spermidineResults agree4 papers: 4 positive, 0 negative or no effect
- CoffeaResults agree3 papers: 3 positive, 0 negative or no effect
- boron atomResults agree3 papers: 3 positive, 0 negative or no effect
- silicon dioxideResults agree3 papers: 3 positive, 0 negative or no effect
- Funneliformis mosseaeResults agree2 papers: 2 positive, 0 negative or no effect
- Gibberellic acidResults agree2 papers: 2 positive, 0 negative or no effect
- brassinolideResults agree2 papers: 2 positive, 0 negative or no effect
- chitosanResults agree2 papers: 2 positive, 0 negative or no effect
- glutathioneResults agree2 papers: 2 positive, 0 negative or no effect
- lead(II) chlorideResults agree2 papers: 0 positive, 2 negative or no effect
- silicate(4-)Results agree2 papers: 2 positive, 0 negative or no effect
- sodium hydrogencarbonateResults agree2 papers: 0 positive, 2 negative or no effect
- fertilizationPositive and negative results94 papers: 78 positive, 16 negative or no effect
- inoculationPositive and negative results31 papers: 28 positive, 3 negative or no effect
- applicationPositive and negative results20 papers: 15 positive, 5 negative or no effect
- nitrogenPositive and negative results17 papers: 10 positive, 7 negative or no effect
- graftingPositive and negative results16 papers: 12 positive, 4 negative or no effect
- nanoparticlePositive and negative results16 papers: 14 positive, 2 negative or no effect
- salinityPositive and negative results14 papers: 1 positive, 13 negative or no effect
- mycorrhizaPositive and negative results10 papers: 9 positive, 1 negative or no effect
- lightPositive and negative results9 papers: 4 positive, 5 negative or no effect
- otherPositive and negative results9 papers: 7 positive, 2 negative or no effect
- potassiumPositive and negative results9 papers: 7 positive, 2 negative or no effect
- co2Positive and negative results8 papers: 4 positive, 4 negative or no effect
- phosphorusPositive and negative results6 papers: 1 positive, 5 negative or no effect
- coldPositive and negative results5 papers: 2 positive, 3 negative or no effect
- growing mediumPositive and negative results5 papers: 4 positive, 1 negative or no effect
Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.