Above and below ground

Pick a pair and watch what the studies say is going on between them: in the air, in the soil, and in the harvest.

Left plant Right plant

Research entries were classified automatically from paper abstracts and have not been reviewed by a person. A land equivalent ratio (LER) above 1 is biased upward by publication bias: trials that found nothing are less likely to be published. Tradition entries are often uncited. The animations are illustrations of the claimed mechanism, not measurements.