Table 3

Alfalfa seedling exudate analysis

MineralWater (ppm)24-h alfalfa root exudates (ppm)48-h alfalfa root exudates (ppm)
P<0.0544.318.41
K<0.0383.3415.90
Ca<0.021.140.13
Mg<0.0032.0113780.081345
S<0.052.5371150.416393
Zn<0.0010.0301590.002796
B<0.020.022722<0.02
Mn< 0.0010.0182370.001564
Fe< 0.0010.0046880.001171
Cu<0.005<0.005<0.005
Al<0.05<0.05<0.05
Na0.11998.2604591.207958