Effects of humic and fulvic acids on the rhizotoxicity of lanthanum and aluminium to corn.

From: Australian Journal of Soil Research | Date: November 1, 1998| Author: Diatloff, E.; Harper, S. M.; Asher, C. J.; Smith, F. W. | Copyright information

Effects of varying lanthanum (La) or aluminium (Al) concentrations (0-30 [micro]M) on corn (Zea mays L.) root elongation were examined in the presence and absence of (i) humic acid (HA) at 35 mg carbon (C)/L, or (ii) fulvic acid (FA) at 15 mg C/L, using dilute nutrient solutions. The organic acids were extracted from a mixture of decomposed grass (Sorghum halepense) and lucerne (Medicago sativa) hay. In the absence of added HA or FA, the addition of La at [is greater than or equal to] 5 [mi...

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