[[File:Vegetated_filter_strip_1.jpg|thumb|Hey Dean, What's the caption for this photo?]]
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[[File:Vegetated_filter_strip_1.jpg|thumb|Grass filter strip draining to vegetated swale. Source: Trinkhaus Engineering]]
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===Soil Amendments===
===Soil Amendments===
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If native soils on the filter strip site are highly compacted, or of such low fertility that vegetation cannot become established, they should be tilled to a depth of 300 mm and amended with [[compost]] to achieve an [[organic matter]] content of 8 - 15 %.
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If native soils on the filter strip site are highly compacted, or of such low fertility that vegetation cannot become established, they should be tilled to a depth of 300 mm and amended with [[compost]] to achieve an [[organic matter]] content of 5 - 15 %.