Table 7.

Nitrogen concentration, percentage of N derived from N₂-fixation, and N fixed per unit of plant dry matter of 7-months-old white clover plants inoculated with different rhizobia strains at two sites (Palo a Pique and Glencoe).

	N concentration (%)			N fixed (%)			Kg Nfix/Mg DM
Strain	Palo a Pique	Glencoe	Mean∗	Palo a Pique	Glencoe	Mean∗	Palo a Pique	Glencoe	Mean∗
N2	3.5	3.0	3.3 a	96	84	90	34	25	30 a
249	3.3	3.1	3.2 a	99	87	93	33	27	30 a
317	3.4	2.9	3.1 a	94	79	86	32	23	27 a
U204	2.9	2.6	2.8 b	98	73	85	29	19	24 b
Mean∗	3.3 a	2.9 b		97 a	81 b		32 a	23 b

^∗Different letters indicate significant differences for either each strain or site after MLMix (DGC with p < 0.05).