Soil: physics · Vigna unguiculata (cowpea)

1. salicylic acidPositive and negative results3 papers: 2 positive, 1 negative or no effect
2. tillagePositive and negative results6 papers: 5 positive, 1 negative or no effect
3. mulchingResults agree8 papers: 8 positive, 0 negative or no effect
4. salinityResults agree5 papers: 0 positive, 5 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.