Evaluation of copper and manganese nutrition of spring wheat triticum aestivum cultivar neepawa grown on organic soils

Karamanos, R.E.; Fradette, J.G.; Gerwing, P.D.

Canadian Journal of Soil Science 65(1): 133-148


ISSN/ISBN: 0008-4271
Accession: 005397405

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A growth chamber experiment with 6 organic soils was conducted to assess the Cu and Mn nutrition of spring wheat grown on organic soils. Three rates of Cu (0, 5, and 10 .mu.g .cntdot. g-1 of equivalent volume of a fsl) and 3 rates on Mn (0, 25, and 50 .mu.g .cntdot. g-1 of equivalent volume of a fsl) were applied in all combinations to spring wheat grown on 6 organic soils. Normal growth of wheat plants was achieved only in soils and treatments where a proper balance on Mn and Cn was achieved. Dry matter yield responses at 45 and 60 days and grain yields reflected the significance of this balance. Normal wheat growth was achieved on organic soils only when the DTPA-extractable soil (soil:extractant ratio of 1:5) Mn/Cu ratio was between 1-15. At Mn/Cu ratio below 1 and above 15, yield reduction and death of plants occurred due to Mn and Cu deficiency, respectively.