Landscape Specification

CONTENTS


 On Slab soil media – B-Horizon


 Quality – Soil must be free from any ‘unwanted materials’

 Physical Properties

                                             Units            Target range
        Property
        Texture, preferred range             n/a              Gravelly loamy sand to organic sandy
                                                              loam
        Air-filled porosity                    %              ≥ 10
        Water-holding capacity                 %              ≥ 40
        Permeability (@ 16 drops by            mm/h           > 100
        McIntyre
        Jakobsen)
        Saturated Density                      kg/L           < 1.8
        Organic matter                         % w/w          <5
        Wettability                            min            ≤5
        Dispensability in water                               1 or 2 (AS4419) Category
        Large particles in the largest dimension
        < 2 mm                                 % w/w          30–70
        2–10 mm                                % w/w          10 –20
        10–20 mm                               % w/w          5–10
        20–50 mm                               % w/w          <5
        > 50 mm                                % w/w          0



 Chemical Properties

      C2. Chemical properties                      Units         Target range
      pH in water (1:5) Standard range             pH units      5.4–6.8
      Electrical Conductivity (1:1.5)              dS/m          < 2.2
      Chloride                                     mg/L          ≤ 200
      Ammonium-N (NH4)                             mg/L          ≤ 100
      Ammonium-N + nitrate-N (NH4 + NO3)           mg/L          ≥ 50
      Nitrogen draw-down index                     -             ≥ 0.7
      Toxicity index                               mm            ≥ 70
      Low phosphorus – P (P-sensitive plants)      mg/L          <3
      Potassium (K)                                mg/L          50–250
      Sulphate (SO4)                               mg/L          ≥ 40
      Calcium (Ca)                                 mg/L          ≥ 80
      Magnesium (Mg)                               mg/L          ≥ 15
      Ca:Mg ratio                                  –             1.5–10
      K:Mg ratio                                   –             1–7
      Sodium (Na)                                  mg/L          ≤ 130
      Iron (Fe)                                    mg/L          ≥ 35
      Cooper (Cu)                                  mg/L          0.4 - 15
      Zinc (Zn)                                    mg/L          0.3 - 10
      Manganese (Mn)                               mg/L          1 - 15
      Boron (B)                                    mg/L          0.02 – 0.65




URBIS
URB-SPC-LAN-P0025138 - IFC.DOCX                                                                      PAGE   53