Table 3.

Gaussian models for the two gypsovags occurring in gypsum and calcareous soils at both sites. The P-value of the corresponding analysis of deviance and the mean value of each variable in each class are indicated

Variable	Salvia lavandulifolia			Rosmarinus officinalis
	Gy/Caa	Siteb	Interaction termc	Gy/Caa	Siteb	Interaction termc
Ash	0·037	ns	ns	0·007	ns	ns
	Ca = 6·36; Gy = 7·23			Ca = 5·43; Gy = 6·04
Ca	0·001	ns	ns	0·019	ns	0·020
	Ca = 1·50; Gy = 1·94			Ca = 1·20; Gy = 1·43		Z-Ca = 1·17; Z-Gy = 1·64; M-Ca = 1·22; M-Gy = 1·22
C	0·001	0·001	ns	0·032	ns	0·011
	Ca = 56·37; Gy = 54·94	Z = 54·7; M = 56·6		Ca = 56·35; Gy = 55·96		Z-Ca = 56·21; Z-Gy = 56·30; M-Ca = 56·49; M-Gy = 55·62
C/N	0·0001	ns	ns	ns	ns	ns
	Ca = 37·53; Gy = 31·31
Mg	0·003	0·003	0·003	0·001	ns	ns
	Ca = 3·03; Gy = 3·28	Z = 2·34; M = 3·97	Z-Ca = 3·04; Z-Gy = 1·64; M-Ca = 3·01; M-Gy = 4·92	Ca = 1·69; Gy = 2·77
N	0·0001	ns	ns	ns	ns	ns
	Ca = 15·08; Gy = 17·64
Na	ns	0·0001	ns	ns	ns	ns
		Z = 0·52; M = 0·35
P	0·006	0·003	0·003	0·004	ns	ns
	Ca = 0·85; Gy = 1·03	Z = 1·03; M = 0·85	Z-Ca = 0·85; Z-Gy = 1·21; M-Ca = 0·85; M-Gy = 0·84	Ca = 0·85; Gy = 0·68
K	ns	0·005	ns	0·017	ns	ns
		Z = 6·80; M = 4·22		Ca = 10·04; Gy = 8·05
S	0·001	ns	ns	ns	ns	ns
	Ca = 0·05; Gy = 0·11

^aCa = calcareous soil, Gy = gypsum soil.

^bM = Madrid (central Spain, Middle Tajo Basin); Z = Zaragoza (north-east Spain, Middle Ebro Basin).

^cZ-Ca = calcareous soils in Zaragoza; Z-Gy = gypsum soils in Zaragoza; Ca-M = calcareous soils in Madrid; Gy-M = gypsum soils in Madrid.

ns indicates that predictors do not explain a significant fraction of deviance. See text for details on statistics. n = 5.