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Effects of sugarcane trash and pineapple residue on soil ph redox potential extractable aluminum iron and manganese



Effects of sugarcane trash and pineapple residue on soil ph redox potential extractable aluminum iron and manganese



Tropical Agriculture 57(3): 245-258



The effects of sugarcane trash and pineapple residue at the rates of 0, 5 and 10% (soil weight basis) on soil pH, redox potential (Eh), extractable Al, Fe and Mn were studied over 4 mo. Application of plant material increased soil pH and decreased Eh. These changes were larger during the early part of incubation than during the latter part. A negative correlation was found between soil pH and Eh. The decrease in extractable Al on addition of organic matter was associated with an increase in soil pH. The concentration of extractable Fe changed very little during the 4 mo. study. An increase in the concentration of water-soluble and exchangeable Mn was associated with increased rates of organic matter application. The addition of high rates of an undecomposed plant material in the manganiferous (high native Mn) soil would increase availble Mn in the soil to the extent that Mn may be toxic to plant growth.

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Accession: 005327766

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