SciELO - Scientific Electronic Library Online

vol.12 issue1Effect of a compost mulch on seed germination and plant growth in a burnt forest soil from NW SpainWater flow and conductivity into capillary and non-capillary pores of soils author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Journal of soil science and plant nutrition

On-line version ISSN 0718-9516


DIAZ-GARCIA, J.A  and  REQUEJO-LOPEZ, R. Use of nonlinear regression and nonlinear mathematical programming in the formulation of substrate mixtures for soil-less culture - a review -. J. Soil Sci. Plant Nutr. [online]. 2012, vol.12, n.1, pp.87-97. ISSN 0718-9516.

With respect to four inorganic and organic substrates - tezontle (volcanic rock), perlite, peat and coir - we studied the relevant physical and chemical properties of mixtures of two of these substrates. A nonlinear regression model was used to analyse the physical properties of each possible mixture. Finally, a methodology is proposed for formulating mixtures of substrates as a deterministic nonlinear mathematical programming problem.

Keywords : Coir; Peat; Nonlinear regression; Nonlinear optimisation; Substrate mixtures; Tezontle.

        · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License