Differentiation Of Forms Of Extractable Iron And Aluminum In Soils Pdf

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Iron oxides dynamics in a subtropical Brazilian Paleudult under long-term no-tillage management.

Metrics details. Soil acidity and low availability of P are among the major problems limiting crop production in the highlands of Ethiopia.

Prediction of reducible soil iron content from iron extraction data

Organic amendments from animal production are commonly used for promoting soil fertility, and their impacts on the residual soil organic carbon SOC are of both agricultural and environmental interest. Iron Fe in the form of oxyhydr oxides has been proposed to play a critical role in long-term SOC preservation by forming Fe-organic associations, though currently a comprehensive understanding of how these Fe-organic associations are regulated by long-term organic amendments is limited. Here, we synthesize information to link Fe oxyhydr oxides, SOC sequestration, and long-term organic inputs from both field and laboratory studies. The results show that vigorous Fe mobilization can be regulated by long-term application of organic amendments, and these organically amended soils contained significantly higher concentrations of poorly crystalline Fe that was closely related to SOC storage in both upland and paddy soils. Potential mechanisms are proposed as follows: 1 DOM from the organically amended soils is more likely to co-precipitate with poorly crystalline Fe, and DOM from the inorganically fertilized soils is to a larger extent adsorbed on poorly crystalline Fe.

Box , Addis Ababa, Ethiopia; gro. Aluminum Al toxicity is one of the major limitations that inhibit plant growth and development in acidic soils. This review updates the existing knowledge concerning the role of mineral nutrition for alleviating Al toxicity in plants to acid soils. Here, we explored phosphorus P is more beneficial in plants under P-deficient, and Al toxic conditions. Exogenous P addition increased root respiration, plant growth, chlorophyll content, and dry matter yield.

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Strongly leached soils occurring in Northwest Iberia contain high concentration of Al which may affect crop growth. Information regarding the extractability of Al and lime required to eliminate toxic Al species in the soil solution is scarce. These values were positively correlated with cation exchange capacity and organic C, clay, Alo and Feo contents. Application of low amounts of lime may prevent the negative effects of soluble Al on crops.

Background

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2 Response
  1. Megan P.

    Information. ePDF PDF · PDF · ePDF PDF · PDF. Tools. Export citation · Add to favorites · Track citation. Share. Give access. Share full text access.

  2. Cassie G.

    Forms and pedogenetic distribution of extractable iron and aluminum in J.E. Brydon, N.M. MilesDifferentiation of forms of extractable Fe and Al in soils. Soil Sci.

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