Table 2: Field 1: stepwise regression relating peak biomass to the weighted (by biomass) plant parameters associated with the various species composition treatments. The parameter definitions are shown in Table 1. Note: the coefficient values represent the relative importance of each variables since they were all standardized to the 0-1 range before use.

High N treatment ( 𝑟 2 = 0 . 1 4 , 𝑃 < . 0 0 0 1 )Low N treatment ( 𝑟 2 = 0 . 2 1 , 𝑃 < . 0 0 0 1 )
VariablesCoefficientSEPVariablesCoefficientSEP

Imax-N438.478.7.0001NUE439.992.0.0001
NUE237.745.6.0001RGR254.0101.4.0126
ρ200.985.5.0192ρ133.442.3.0017
PUE−348.481.0.0001
R : S−177.774.9.0181

P treatment ( 𝑟 2 = 0 . 2 3 , 𝑃 < . 0 0 0 1 )
VariablesCoefficientSEP

RGR713.574.7.0001
Imax-P562.491.1.0001
NUE533.968.5.0001
δ414.561.7.0001
Imax-N−508.7105.0.0001
PUE−373.461.8.0001
β−196.741.9.0001
τ−190.156.5.0008
ρ−157.841.9.0002
R : S−127.241.7.0023