RT Journal Article
T1 Multifractal and joint multifractal description of available nutrients concentrations extracted by two methods along short transects
A1 García-Tomillo, Aitor
A1 da Silva Dias, Rosane
A1 Vidal Vázquez, Eva
A1 Varela Vila, Irene
A1 Valcárcel Armesto, Montserrat
A1 Dafonte Dafonte, Jorge
A1 Paz-González, Antonio
K1 Macronutrients
K1 Soil testing
K1 Spatial variability
K1 Multifractal analysis
AB Spatial variability of available P, K, Ca and Mg, sampled along two short transects and determined by two different extraction methods, was characterized using multifractal and joint multifractal analysis. Sixty-six soil samples were collected every 0.8 m, both in a vineyard and in a polyculture field. Available nutrients were extracted with an ion exchange resin and the Mehlich 3 solution. Shape and width of singularity, f(α) versus α, and generalized dimension, Dq, spectra, showed that spatial distributions obtained by the two tests behaved as quasi-monofractals in the vineyard, but were fitted with multifractal models under polyculture. Joint multifractal analysis demonstrated positive correlations between the scaling indices of P, K, Ca and Mg, extracted by resin and Mehlich 3, which were stronger under polyculture. Pearson correlations between available nutrients determined by two tests at the single scale ranged from R2 = 0.54 to 0.95 and were weaker than those of the respective scaling indices across the range of scales studied, which varied from R2 = 0.63 to 0.97. The joint multifractal approach showed that single scale analysis may be insufficient to compare relationships between available nutrient tests. Moreover, multifractal analysis may be useful to upscaling/downscaling nutrient availability.
PB Taylor & Francis
SN 1476-3567
YR 2019
FD 2019-04-25
LK https://hdl.handle.net/10347/38523
UL https://hdl.handle.net/10347/38523
LA eng
NO García-Tomillo, A., da Silva Dias, R., Vidal Vázquez, E., Varela Vila, I., Valcárcel Armesto, M., Dafonte-Dafonte, J., & Paz-González, A. (2020). Multifractal and joint multifractal description of available nutrients concentrations extracted by two methods along short transects. Archives of Agronomy and Soil Science, 66(2), 236-249. https://doi.org/10.1080/03650340.2019.1608954
NO This is an Accepted Manuscript of an article published by Taylor & Francis in Archives of Agronomy and Soil Science on 25 Apr 2019, available at: https://doi.org/10.1080/03650340.2019.1608954
DS Minerva
RD 25 abr 2026