Nutrient: content · Populus (poplar)

1. zinc atomPositive and negative results4 papers: 3 positive, 1 negative or no effect
2. ethylenediaminetetraacetic acidPositive and negative results2 papers: 1 positive, 1 negative or no effect
3. cadmium atomResults agree3 papers: 0 positive, 3 negative or no effect
4. Paxillus involutusResults agree2 papers: 2 positive, 0 negative or no effect
5. iron atomResults agree2 papers: 2 positive, 0 negative or no effect
6. fertilizationPositive and negative results16 papers: 10 positive, 6 negative or no effect
7. nitrogenPositive and negative results7 papers: 5 positive, 2 negative or no effect
8. pruningPositive and negative results3 papers: 2 positive, 1 negative or no effect
9. droughtPositive and negative results2 papers: 1 positive, 1 negative or no effect
10. otherPositive and negative results2 papers: 1 positive, 1 negative or no effect
11. rotationPositive and negative results2 papers: 1 positive, 1 negative or no effect
12. inoculationResults agree9 papers: 9 positive, 0 negative or no effect
13. densityResults agree3 papers: 3 positive, 0 negative or no effect
14. mycorrhizaResults agree3 papers: 3 positive, 0 negative or no effect
15. in vitroResults agree2 papers: 2 positive, 0 negative or no effect
16. lightResults 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.