Abstract
Cu toxicity to forage maize was studied in a factorial field experiment comprising 4 Cu rates (0, 100, 200 or 300 kg Cu/ha) and 4 pH levels. Results are presented for crop yield and mineral composition. Raising the soil pH reduced the toxic effect of Cu to a smaller extent than would be predicted from the reduction in the Cu2+ ion activity. Apparently an increase in pH increased the toxicity of Cu2+ ions in sol. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 2
Claim · model-written summary
Raising soil pH reduced copper toxicity to forage maize less than predicted from copper ion activity.
Verbatim
t0“forage maize”
e0“Raising the soil pH reduced the toxic effect of Cu to a smaller extent than would be predicted from the reduction in the Cu2+ ion activity.”
Claim · model-written summary
The authors infer that higher pH increased the toxicity of dissolved copper ions.
Verbatim
t0“forage maize”
e0“Apparently an increase in pH increased the toxicity of Cu2+ ions in sol.”
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