View Full Table | Close Full ViewTable 1.

Selected chemical and physical properties for the two fly ashes and the soil used in the study.

 
Properties Grey ash Red ash Soil†
pH 10.8 9.0 6.5
Electrical conductivity (dS m−1) 0.54 19.1 0.8
Specific surface area (m2 g−1)‡ 2.09 2.76 NA
Total nutrient contents (%)
 C 0.70 0.10 NA
 Ca 0.26 9.28 0.17
 K 0.13 0.18 0.13
 Mg 0.05 8.94 0.03
 Na 0.02 1.75 0.01
 P 0.02 0.02 0.15
Selected metal concentrations (mg kg−1)
 Al (x103) 14.4 21.1 NA
 B 66.0 127.0 11.5
 B (hot water extractable) 6.7 6.8 0.46
 Ca (soluble) 766 7647 52.5
 Cd 0.3 0.1 < 0.1
 Co 6.0 42.0 < 0.1
 Cu 18.0 24.0 10.3
 Fe 7616 343,840 NA
 Mo 9.0 5.0 0.5
 Mn 453 4713 NA
 Pb 18.0 5.0 11.9
 Si 794 1124 NA
 Zn 56.0 117.0 22.5
NA, data not available.
From Aitken et al. (1984)



View Full Table | Close Full ViewTable 2.

Mean concentrations ( ± standard errors) of photosynthetic pigments for representative species of the three families of plants used in this study.

 
Chlorophyll a (μg g−1) Chlorophyll b (μg g−1) Carotenoid (μg g−1)
Plant Ash treatment 28 DAS 76 DAS 28 DAS 76 DAS 28 DAS 76 DAS
Barley Control 1779 ± 103 1433 ± 93 957 ± 112 771 ± 61 17.3 ± 4.8 16.3 ± 1.22
Grey ash 1727 ± 67 1510 ± 55 971 ± 78 866 ± 52 16.1 ± 2.2 16.7 ± 0.40
Red ash 1757 ± 78 1675 ± 59 986 ± 56 993 ± 31 16.0 ± 5.4 17.2 ± 0.82
Radish Control 475 ± 25 438 ± 76 247 ± 29 236 ± 42 27.3 ± 0.4 23.0 ± 1.22
Grey ash 466 ± 31 770 ± 95 254 ± 57 415 ± 39 28.1 ± 3.5 19.2 ± 1.06
Red ash 971 ± 88 898 ± 160 511 ± 45 484 ± 83 19.9 ± 1.2 18.9 ± 1.61
Lucerne Control 1264 ± 82 1540 ± 222 594 ± 35 849 ± 235 17.3 ± 0.67 17.1 ± 0.47
Grey ash 1540 ± 155 1455 ± 25 764 ± 120 764 ± 120 17.4 ± 0.54 17.3 ± 0.58
Red ash 1217 ± 136 1514 ± 237 621 ± 88 856 ± 190 18.0 ± 1.87 16.9 ± 1.00