Traits	N	P	N×P	W	N×W	P×W	C
Total root length (TRL)	**	NS	NS	*	NS	NS	**
Root surface area (RSA)	*	*	NS	***	NS	NS	**
Root volume (RV)	NS	*	NS	***	NS	NS	**
Root tips (RT)	**	**	NS	NS	NS	NS	***
Root biomass (RB)	NS	NS	NS	**	NS	NS	**
SRL	**	NS	NS	**	*	**	**
RTD	NS	NS	NS	NS	NS	NS	NS