Table 2 Results from an Adonis test evaluating changes in crop commodity group composition at national scales from 1961 to 2017.

From: National-scale changes in crop diversity through the Anthropocene

Parameter

D.F

Sum of squares

Mean squares

Model F

r2

p value

Year

1

7.2

7.3

410.8

0.002

0.01

Country

175

3862.8

22.1

1250.8

0.895

0.01

Year*country

175

273.2

1.6

88.5

0.063

0.01

Residuals

9680

170.8

0.02

–

0.04

–

Total

10,031

4314.2

–

–

1

–

  1. The distance matrix employed in this analysis was based on non-metric multidimensional scaling, whereby cultivation area was used as an estimate for crop group abundance. Results are presented visually in Figure S1.
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