Landscape Specification

CONTENTS


 On Slab soil media – A-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
        Chloride                               %             ≥ 40
        Permeability (@ 16 drops by            mm/h          > 100
        McIntyre
        Jakobsen)
        Saturated Density                      kg/L          < 2.4
        Organic matter                         % w/w         < 15
        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

                                             Units           Target range
        C2. Chemical properties
        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 +        mg/L            ≥ 50
        NO3)
        Nitrogen draw-down index             -               ≥ 0.7
        Toxicity index                       mm              ≥ 70
        Phosphorus – P standard range        mg/L            8–40
        Low phosphorus – P (P-sensitive      mg/L            <3
        plants)
        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   52