Table 2.

Parameter n_b (g m^–2) of the relationship between leaf N per unit leaf area (N_LA) and relative incident PFD (I/I₀) for Medicago sativa, Dactylis glomerata and Taraxacum officinale individuals grown in monospecific dense and open stands and in Lolium multiflorum, Lolium perenne and Poa pratensis grass stands

	n b
Species	Dense	Open	L. m.	L. p.	P. p.
M. s.	0·25 (n. s.)	0·55 (0·08)	0·75 (0·04)		0·56 (0·22)
D. g.	0·42 (0·06)	0·52 (0·05)	0·55 (0·06)		0·39 (0·05)
T. o.	0·42 (0·22)	0·42 (0·22)	0·42 (0·22)	0·42 (0·22)	0·42 (0·22)

Regression models (eqn 2b): N_LA = b exp(–K_Fb F) + n_b.

Mean and s.e. in parenthesis.