- salinityPositive and negative results22 papers: 7 positive, 15 negative or no effect
- growing mediumPositive and negative results19 papers: 13 positive, 6 negative or no effect
- nanoparticlePositive and negative results19 papers: 16 positive, 3 negative or no effect
- heavy metalPositive and negative results17 papers: 1 positive, 16 negative or no effect
- processingPositive and negative results15 papers: 7 positive, 8 negative or no effect
- classPositive and negative results14 papers: 11 positive, 3 negative or no effect
- seed treatmentPositive and negative results13 papers: 12 positive, 1 negative or no effect
- co2Positive and negative results12 papers: 10 positive, 2 negative or no effect
- radiationPositive and negative results12 papers: 10 positive, 2 negative or no effect
- in vitroPositive and negative results10 papers: 6 positive, 4 negative or no effect
- phosphorusPositive and negative results10 papers: 9 positive, 1 negative or no effect
- densityPositive and negative results9 papers: 5 positive, 4 negative or no effect
- allelopathyPositive and negative results8 papers: 3 positive, 5 negative or no effect
- coldPositive and negative results8 papers: 4 positive, 4 negative or no effect
- droughtPositive and negative results7 papers: 2 positive, 5 negative or no effect
- pollutionPositive and negative results7 papers: 1 positive, 6 negative or no effect
- stagePositive and negative results7 papers: 1 positive, 6 negative or no effect
- irrigationPositive and negative results6 papers: 4 positive, 2 negative or no effect
- mulchingPositive and negative results6 papers: 4 positive, 2 negative or no effect
- organicPositive and negative results6 papers: 4 positive, 2 negative or no effect
- phPositive and negative results6 papers: 1 positive, 5 negative or no effect
- sowing timePositive and negative results6 papers: 3 positive, 3 negative or no effect
- heatPositive and negative results5 papers: 2 positive, 3 negative or no effect
- intercroppingPositive and negative results5 papers: 4 positive, 1 negative or no effect
- uvPositive and negative results5 papers: 3 positive, 2 negative or no effect
- pathogen productPositive and negative results4 papers: 1 positive, 3 negative or no effect
- fungicidePositive and negative results3 papers: 1 positive, 2 negative or no effect
- herbicidePositive and negative results3 papers: 1 positive, 2 negative or no effect
- soil waterPositive and negative results3 papers: 1 positive, 2 negative or no effect
- mycorrhizaPositive and negative results2 papers: 1 positive, 1 negative or no effect
- storagePositive and negative results2 papers: 1 positive, 1 negative or no effect
- trap barrierPositive and negative results2 papers: 1 positive, 1 negative or no effect
- potassiumResults agree6 papers: 6 positive, 0 negative or no effect
- physical treatmentResults agree4 papers: 4 positive, 0 negative or no effect
- rainfallResults agree4 papers: 0 positive, 4 negative or no effect
- transplantingResults agree4 papers: 4 positive, 0 negative or no effect
- infectionResults agree3 papers: 0 positive, 3 negative or no effect
- propertyResults agree3 papers: 0 positive, 3 negative or no effect
- alkalinityResults agree2 papers: 2 positive, 0 negative or no effect
- cover cropResults agree2 papers: 0 positive, 2 negative or no effect
- cultivation systemResults agree2 papers: 2 positive, 0 negative or no effect
- limeResults agree2 papers: 2 positive, 0 negative or no effect
- shadeResults agree2 papers: 0 positive, 2 negative or no effect
- soilResults agree2 papers: 0 positive, 2 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.