- iron atomPositive and negative results13 papers: 11 positive, 2 negative or no effect
- silicon atomPositive and negative results9 papers: 8 positive, 1 negative or no effect
- Vigna unguiculataPositive and negative results7 papers: 5 positive, 2 negative or no effect
- aluminium atomPositive and negative results5 papers: 1 positive, 4 negative or no effect
- magnesium atomPositive and negative results5 papers: 4 positive, 1 negative or no effect
- cadmium atomPositive and negative results4 papers: 1 positive, 3 negative or no effect
- calcium atomPositive and negative results4 papers: 1 positive, 3 negative or no effect
- sulfur atomPositive and negative results4 papers: 1 positive, 3 negative or no effect
- calcium carbonatePositive and negative results3 papers: 2 positive, 1 negative or no effect
- manganese atomPositive and negative results3 papers: 1 positive, 2 negative or no effect
- p-chloromercuribenzenesulfonic acidPositive and negative results3 papers: 1 positive, 2 negative or no effect
- sodium chloridePositive and negative results3 papers: 1 positive, 2 negative or no effect
- boron atomPositive and negative results2 papers: 1 positive, 1 negative or no effect
- selenium atomPositive and negative results2 papers: 1 positive, 1 negative or no effect
- sulfuric acidPositive and negative results2 papers: 1 positive, 1 negative or no effect
- zinc atomResults agree13 papers: 13 positive, 0 negative or no effect
- salicylic acidResults agree6 papers: 6 positive, 0 negative or no effect
- zinc sulfateResults agree6 papers: 6 positive, 0 negative or no effect
- copper atomResults agree4 papers: 4 positive, 0 negative or no effect
- AzospirillumResults agree3 papers: 3 positive, 0 negative or no effect
- iron(2+) sulfate (anhydrous)Results agree3 papers: 3 positive, 0 negative or no effect
- silicate(4-)Results agree3 papers: 3 positive, 0 negative or no effect
- AzotobacterResults agree2 papers: 2 positive, 0 negative or no effect
- Cicer arietinumResults agree2 papers: 2 positive, 0 negative or no effect
- Glycine maxResults agree2 papers: 2 positive, 0 negative or no effect
- LeucaenaResults agree2 papers: 2 positive, 0 negative or no effect
- ammoniaResults agree2 papers: 2 positive, 0 negative or no effect
- atrazineResults agree2 papers: 2 positive, 0 negative or no effect
- diltiazemResults agree2 papers: 0 positive, 2 negative or no effect
- ethylResults agree2 papers: 2 positive, 0 negative or no effect
- molybdenum atomResults agree2 papers: 0 positive, 2 negative or no effect
- sulfateResults agree2 papers: 2 positive, 0 negative or no effect
- verapamilResults agree2 papers: 0 positive, 2 negative or no effect
- fertilizationPositive and negative results118 papers: 111 positive, 7 negative or no effect
- nitrogenPositive and negative results52 papers: 46 positive, 6 negative or no effect
- inoculationPositive and negative results35 papers: 31 positive, 4 negative or no effect
- phosphorusPositive and negative results25 papers: 24 positive, 1 negative or no effect
- applicationPositive and negative results24 papers: 23 positive, 1 negative or no effect
- mycorrhizaPositive and negative results22 papers: 21 positive, 1 negative or no effect
- intercroppingPositive and negative results15 papers: 9 positive, 6 negative or no effect
- organicPositive and negative results14 papers: 13 positive, 1 negative or no effect
- potassiumPositive and negative results14 papers: 9 positive, 5 negative or no effect
- irrigationPositive and negative results13 papers: 10 positive, 3 negative or no effect
- tillagePositive and negative results11 papers: 10 positive, 1 negative or no effect
- biocharPositive and negative results9 papers: 7 positive, 2 negative or no effect
- rotationPositive and negative results7 papers: 6 positive, 1 negative or no effect
- densityPositive and negative results6 papers: 3 positive, 3 negative or no effect
- droughtPositive and negative results5 papers: 2 positive, 3 negative or no effect
- otherPositive and negative results5 papers: 3 positive, 2 negative or no effect
- seed treatmentPositive 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.