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→Soil Characterization Testing
|<sup>iii</sup> <small> Based on Ontario Ministry of Food and Rural Affairs’ Soil Fertility Handbook guidance on soil fertility testing for crop production ([http://www.omafra.gov.on.ca/english/crops/pub611/pub611.pdf OMAFRA, 2006])<ref>OMAFRA. 2006. Soil Fertility Handbook Publication 611. Guelph, Ontario, Canada. http://www.omafra.gov.on.ca/english/crops/pub611/pub611.pdf.</ref>. </small>
|<sup>iii</sup> <small> Based on Ontario Ministry of Food and Rural Affairs’ Soil Fertility Handbook guidance on soil fertility testing for crop production ([http://www.omafra.gov.on.ca/english/crops/pub611/pub611.pdf OMAFRA, 2006])<ref>OMAFRA. 2006. Soil Fertility Handbook Publication 611. Guelph, Ontario, Canada. http://www.omafra.gov.on.ca/english/crops/pub611/pub611.pdf.</ref>. </small>
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|<sup>iv</sup> <small> Based on Minnesota Pollution Control Agency (MPCA, 2015) for minimum to sustain plant growth and Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA, 2014) for a maximum to avoid unnecessary fertilization that would have low or no effect on plant health. </small>
|<sup>iv</sup> <small> Based on Minnesota Pollution Control Agency (MPCA, 2015)<ref>Minnesota Pollution Control Agency (MPCA). 2015. Minnesota Stormwater Manual. Accessed April 15, 2015. http://stormwater.pca.state.mn.us/index.php/Main_Page</ref> for minimum to sustain plant growth and Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA, 2014)<ref>Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA). 2014. Guide to Nursery and Landscape Plant Production and IPM. Publication #841. Toronto, Ontario. http://www.omafra.gov.on.ca/english/crops/pub841/pub841.pdf</ref> for a maximum to avoid unnecessary fertilization that would have low or no effect on plant health. </small>
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|<sup>v</sup> <small> Based on the threshold for non-saline soils (Whitney, 2012). </small>
|<sup>v</sup> <small> Based on the threshold for non-saline soils (Whitney, 2011)<ref>Whitney, D.A. 2012. “Soil Salinity.” In Recommended Chemical Soil Test Procedures for the North Central Region. North Central Regional Research Publication No. 221. Missouri Agricultural Experimental Station. https://www.canr.msu.edu/uploads/234/68557/rec_chem_soil_test_proce55c.pdf </small>
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|<sup>vi</sup> <small>Interpolated value from bulk density figure beside this table. based on a sandy loam soil containing at least 70% sand-sized particles. </small>
|<sup>vi</sup> <small>Interpolated value from bulk density figure beside this table. based on a sandy loam soil containing at least 70% sand-sized particles. </small>
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|<sup>vii</sup> <small>Based on German green roof standards (FLL 2008). Specifications will vary depending on the green roof growing media product. Product specifications should be provided by the media supplier. Test results should be compared to the media supplier’s specifications and permissible tolerance ranges. </small>
|<sup>vii</sup> <small>Based on German green roof standards (FLL, 2018)<ref>Forschungsgesellschaft Landschaftsentwicklung Landschaftsbau (FLL). 2008. Guidelines for the Planning, Construction and Maintenance of Green Roofs. The Landscaping and Landscape Development Research Society E.V., Bonn, Germany. https://shop.fll.de/de/downloadable/download/sample/sample_id/44/</ref>. Specifications will vary depending on the green roof growing media product. Product specifications should be provided by the media supplier. Test results should be compared to the media supplier’s specifications and permissible tolerance ranges. </small>
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|<sup>viii</sup> <small>Based on Penn State University Center for Green Roof Research (Berghage et al. 2008). </small>
|<sup>viii</sup> <small>Based on Penn State University Center for Green Roof Research (Berghage et al. 2008)<ref>Berghage, R., Wolf. A., Miller, C. 2008. Testing Green Roof Media for Nutrient Content. Presented at
Greening Rooftops for Sustainable Communities, held in Baltimore, MD from April 30 to May 2, 2008</ref>. </small>
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|<sup>ix</sup> <small>Based on Penn State University Center for Green Roof Research (Berghage et al. 2008) for the minimum to sustain plant growth and Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA, 2014) for the maximum to avoid unnecessary fertilization that would have low or no effect on plant health. </small>
|<sup>ix</sup> <small>Based on Penn State University Center for Green Roof Research (Berghage et al. 2008) for the minimum to sustain plant growth and Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA, 2014) for the maximum to avoid unnecessary fertilization that would have low or no effect on plant health. </small>