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Nitrogen losses from added urea and urease activity of a clay-loam soil amended with crop residues

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Summary

Laboratory experiments were performed to determine N-losses from added urea and urease activity of a clay-loam soil treated with various crop residues. The data presented show that both urea-N losses and urease kinetic parameters (Vmax and Km) are modified by the incorporation of vegetable residues into the soil. These variations were determined for three different temperatures in order to calculate the activation energy (Ea) by Arrhenius plot. Change of enthalpy (ΔHa), entropy (ΔSa) and free energy of activation (ΔFa) were also calculated.

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Authors and Affiliations

  1. Istituto di Chimica Agraria, Università degli Studi di Perugia, Italy

    P. Perucci, P. L. Giusquiani & L. Scarponi

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  1. P. Perucci
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  2. P. L. Giusquiani
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  3. L. Scarponi
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Perucci, P., Giusquiani, P.L. & Scarponi, L. Nitrogen losses from added urea and urease activity of a clay-loam soil amended with crop residues. Plant Soil 69, 457–463 (1982). https://doi.org/10.1007/BF02372466

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  • DOI: https://doi.org/10.1007/BF02372466

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