- sulfur atomPositive and negative results5 papers: 4 positive, 1 negative or no effect
- zinc atomPositive and negative results4 papers: 3 positive, 1 negative or no effect
- boron atomPositive and negative results3 papers: 2 positive, 1 negative or no effect
- iron atomResults agree4 papers: 4 positive, 0 negative or no effect
- zinc sulfateResults agree3 papers: 3 positive, 0 negative or no effect
- AzospirillumResults agree2 papers: 2 positive, 0 negative or no effect
- manganese atomResults agree2 papers: 2 positive, 0 negative or no effect
- fertilizationPositive and negative results17 papers: 15 positive, 2 negative or no effect
- applicationResults agree5 papers: 5 positive, 0 negative or no effect
- inoculationResults agree5 papers: 5 positive, 0 negative or no effect
- salinityResults agree4 papers: 0 positive, 4 negative or no effect
- droughtResults agree3 papers: 0 positive, 3 negative or no effect
- nanoparticleResults agree3 papers: 3 positive, 0 negative or no effect
- potassiumResults agree3 papers: 3 positive, 0 negative or no effect
- biocharResults agree2 papers: 2 positive, 0 negative or no effect
- heavy metalResults agree2 papers: 0 positive, 2 negative or no effect
- mycorrhizaResults agree2 papers: 2 positive, 0 negative or no effect
- nitrogenResults agree2 papers: 2 positive, 0 negative or no effect
- otherResults agree2 papers: 2 positive, 0 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.