P-value P-value
Response variable Treatment series Weed-free vs weedy Weedy duration
Leaf number Early-season removal 0.065 <0.001
Late-season addition 0.280 <0.001
Leaf area Early-season removal <0.001 0.704
Late-season addition 0.975 <0.001
Leaf biomass Early-season removal <0.001 0.832
Late-season addition 0.641 <0.001
Root biomass Early-season removal <0.001 0.420
Late-season addition 0.748 <0.001