Changes

!Recommended method

!Recommended method

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![[Texture]]

![[Particle-size distribution]]

|< 25% silt- and clay-sized particles combined; <br> < 10% clay-sized particles||Hydrometer

|< 25% silt- and clay-sized particles (smaller than 0.05 mm) combined; <br> 3 to 12% clay-sized particles (0.002 mm or smaller)||ASTM D7928, Standard Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer) Analysis.

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![[Organic matter]] (OM)

![[Organic matter (OM)]]

|5 to 10% by dry weight||ASTM F1647, Standard test methods for organic matter content of athletic field rootzone mixes.

|3 to 10% by dry weight||ASTM F1647, Standard Test Methods for Organic Matter Content of Athletic Field Rootzone Mixes.

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![[Phosphorus]]

![[Phosphorus, plant-available]]

|12 to 40 ppm||As measured by the 'Olsen' method for alkaline and calcareous soils (common in Ontario). Alternatives include 'Mehlich I or III', or 'Bray', better suited to acidic to slightly alkaline and non-calcareous soils. Results from these are not directly translatable.<ref>Sawyer JE, Mallarino AP. Differentiating and Understanding the Mehlich 3, Bray, and Olsen Soil Phosphorus Tests 1. http://www.agronext.iastate.edu/soilfertility/info/mnconf11_22_99.pdf. Accessed August 1, 2017.</ref>

|12 to 40 ppm||As measured by the 'Olsen' method for alkaline and calcareous soils (common in Ontario). Alternatives include 'Mehlich I or III', or 'Bray', better suited to acidic to slightly alkaline and non-calcareous soils. Results from these are not directly translatable.<ref>Sawyer JE, Mallarino AP. Differentiating and Understanding the Mehlich 3, Bray, and Olsen Soil Phosphorus Tests 1. http://www.agronext.iastate.edu/soilfertility/info/mnconf11_22_99.pdf. Accessed August 1, 2017.</ref>

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![[Cationic exchange capacity(CEC)]]

![[Cationic exchange capacity (CEC)]]

|> 10 meq/100 g||ASTM D7503, Standard test methods for measuring the exchange complex and cation exchange capacity of inorganic fine grained soils.  

|> 10 meq/100 g||ASTM D7503, Standard Test methods for Measuring the Exchange Complex and Cation Exchange Capacity of Inorganic Fine-Grained Soils.  

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![[Hydraulic conductivity]]

![[Hydraulic conductivity, saturated (KSAT)]]

|> 25 mm/h <br> < 250 mm/h||Falling head or constant head KSAT

|> 25 mm/h <br> < 300 mm/h||ASTM D2434, Standard Test Method for Permeability of Granular Soils (Constant Head), when the sample is compacted to 85% of its maximum dry density in accordance with ASTM D698, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort.

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Note that grain size distribution does not form part of the recommended acceptance criteria. Whilst this information may be useful in designing blends, the disconnect between hydraulic conductivity and the uniformity of gradation makes it far less important then measuring the hydraulic conductivity directly<ref>CRC for Water Sensitive Cities. (2015). Adoption Guidelines for Stormwater Biofiltration Systems: Appendix C - Guidelines for filter media in stormwater biofiltration systems.</ref>  

Note that particle-size distribution does not form part of the recommended acceptance criteria. While this information may be useful in designing blends, the disconnect between hydraulic conductivity and the uniformity of gradation makes it far less important than measuring the hydraulic conductivity directly<ref>CRC for Water Sensitive Cities. (2015). Adoption Guidelines for Stormwater Biofiltration Systems: Appendix C - Guidelines for filter media in stormwater biofiltration systems.</ref>  

==Sand==

==Sand==