- salicylic acidPositive and negative results23 papers: 22 positive, 1 negative or no effect
- manganese atomPositive and negative results15 papers: 14 positive, 1 negative or no effect
- boron atomPositive and negative results11 papers: 10 positive, 1 negative or no effect
- Triticum aestivumPositive and negative results9 papers: 8 positive, 1 negative or no effect
- Oryza sativaPositive and negative results6 papers: 5 positive, 1 negative or no effect
- potassium sulfatePositive and negative results6 papers: 4 positive, 2 negative or no effect
- OrobanchePositive and negative results4 papers: 1 positive, 3 negative or no effect
- SorghumPositive and negative results4 papers: 3 positive, 1 negative or no effect
- metribuzinPositive and negative results4 papers: 1 positive, 3 negative or no effect
- Allium cepaPositive and negative results3 papers: 2 positive, 1 negative or no effect
- Linum usitatissimumPositive and negative results3 papers: 2 positive, 1 negative or no effect
- (+)-abscisic acidPositive and negative results2 papers: 1 positive, 1 negative or no effect
- (2-chloroethyl)phosphonic acidPositive and negative results2 papers: 1 positive, 1 negative or no effect
- nickel atomPositive and negative results2 papers: 1 positive, 1 negative or no effect
- fertilizationPositive and negative results176 papers: 159 positive, 17 negative or no effect
- applicationPositive and negative results116 papers: 110 positive, 6 negative or no effect
- intercroppingPositive and negative results73 papers: 59 positive, 14 negative or no effect
- phosphorusPositive and negative results68 papers: 63 positive, 5 negative or no effect
- irrigationPositive and negative results62 papers: 49 positive, 13 negative or no effect
- densityPositive and negative results57 papers: 41 positive, 16 negative or no effect
- otherPositive and negative results39 papers: 32 positive, 7 negative or no effect
- herbicidePositive and negative results38 papers: 32 positive, 6 negative or no effect
- sowing timePositive and negative results28 papers: 19 positive, 9 negative or no effect
- tillagePositive and negative results21 papers: 16 positive, 5 negative or no effect
- stagePositive and negative results15 papers: 10 positive, 5 negative or no effect
- limePositive and negative results14 papers: 13 positive, 1 negative or no effect
- pollinationPositive and negative results12 papers: 7 positive, 5 negative or no effect
- mulchingPositive and negative results11 papers: 9 positive, 2 negative or no effect
- organicPositive and negative results11 papers: 10 positive, 1 negative or no effect
- micronutrientPositive and negative results8 papers: 7 positive, 1 negative or no effect
- classPositive and negative results7 papers: 6 positive, 1 negative or no effect
- insecticidePositive and negative results7 papers: 3 positive, 4 negative or no effect
- radiationPositive and negative results7 papers: 4 positive, 3 negative or no effect
- cultivation systemPositive and negative results6 papers: 4 positive, 2 negative or no effect
- pruningPositive and negative results6 papers: 5 positive, 1 negative or no effect
- heatPositive and negative results5 papers: 3 positive, 2 negative or no effect
- trap barrierPositive and negative results5 papers: 4 positive, 1 negative or no effect
- climate sitePositive and negative results4 papers: 2 positive, 2 negative or no effect
- processingPositive and negative results4 papers: 2 positive, 2 negative or no effect
- transplantingPositive and negative results4 papers: 1 positive, 3 negative or no effect
- cover cropPositive and negative results3 papers: 2 positive, 1 negative or no effect
- storagePositive and negative results3 papers: 1 positive, 2 negative or no effect
- propertyPositive and negative results2 papers: 1 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.