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Factoid Details

‘Boron can be in a soil.’

[(k boron.n) in.p ⟨the soil.n⟩]

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In Wikipedia:

When boron in the soil exceeds 2.0ppm, few plants will perform well.
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In Wikipedia:

Levels as low as 0.8ppm can cause these same symptoms to appear in plants particularly sensitive to boron in the soil.
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In Wikipedia:

While too much boron is toxic, a complete lack of boron in the soil can cause a crop failure.
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In Wikipedia:

Plants sensitive to boron in the soil may not survive.
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In Wikipedia:

Nearly all plants, even those somewhat tolerant of boron in the soil, will show at least some symptoms of boron toxicity when boron in the soil is greater than 1.8ppm.
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In Wikipedia:

Most plants, even those tolerant of boron in the soil, will show symptoms of boron toxicity when boron levels are higher than 1.8 ppm.
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Queried on 2013-05-20.