ANOVAs for host plant biomass and host plant nitrogen concentration.

The term representing host plant species identity (“Host plant species”) is split into two contrasts: “non-legume vs. legume” and the term containing the remaining variance from host plant species identity (“rest”). So for example (row 4), non-legume host plant species have a higher biomass than legume host plant species but other host plant species identity effects are not significant. “Plant species richness” and “Legume presence” were tested against “Plotcode”, all other terms against “Residuals”. Directions of significant main effects (with 1 df) are indicated by arrows. P-values<0.05 are printed in bold. MS = mean square.