Table 4.

Linear correlation coefficients (r) between edaphic factors and the cover values of the dominant species.

Species	Edaphic variable
	CaCO3	${\text{HCO}}_3^{-}$	pH	Electrical conductivity	Organic carbon	Gravels	Coarse and medium sand	Fine and very fine sand	Silt and clay
Chenopodium murale	−0.014	−0.044	0.139	−0.293⁎	−0.541⁎⁎	0.139	0.143	−0.044	−0.356⁎⁎
Convolvulus arvensis	−0.230	0.179	−0.111	0.055	0.377⁎⁎	0.081	0.003	−0.093	0.075
Conyza bonariensis	0.238	−0.081	0.187	0.164	0.327⁎	0.031	−0.257	−0.002	0.452⁎⁎
Cynodon dactylon	0.063	0.001	0.266	0.202	0.390⁎⁎	0.048	−0.354⁎⁎	0.122	0.375⁎⁎
Echinochloa colona	−0.034	−0.186	0.088	−0.285⁎	−0.304⁎	0.122	0.142	−0.065	−0.292⁎
Eragrostis cilianensis	0.036	0.133	−0.270⁎	−0.039	0.121	−0.049	0.073	−0.082	0.079
Imperata cylindrica	0.242	0.124	−0.189	0.154	0.369⁎⁎	−0.173	−0.272⁎	0.264	0.213
Melilotus indicus	−0.290⁎	−0.083	0.008	−0.155	−0.297⁎	0.089	0.214	−0.100	−0.320⁎
Plantago lagopus	0.060	−0.033	0.052	0.211	0.356⁎⁎	−0.125	−0.069	−0.006	0.294⁎
Portulaca oleracea	0.118	−0.048	−0.010	−0.247	−0.240	0.095	0.110	−0.071	−0.186

^⁎P < 0.05.

^⁎⁎P < 0.01.