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Canonical correspondence analysis (CCA) of the 12 main genera found in roots of maize plants grown in fallow and maize-cultivated soils. Solid arrows represent vector scores for the different genera. Open and closed triangles represent the axes 1 and 2 scores for the main genera found in fallow (F1 and F2) and maize-cultivated (MC1 and MC2) soils, respectively. The dashed arrow represents the biplot vector for cultivation history of the soil.
