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Talk:Soil test

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This is an old revision of this page, as edited by 69.87.199.38 (talk) at 18:38, 1 June 2008 (→‎Natural indicators: new section). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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Natural indicators

Hydrangea indicates soil pH with pink or blue flower color changes. What natural indicators are there for what soil parameters? Are there any natural indicators for lead? The cost and hassle of lab soil testing is an impediment to awareness of actual distribution of urban contamination. -69.87.199.38 (talk) 18:38, 1 June 2008 (UTC)[reply]

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