Puddles of blue-green algae

Puddles of blue-green algae

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Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: An algal flush of cyanobacteria, formerly called blue- green algae, in the ruts left by a tractor in a field of barley. The flush appeared within days of the puddles being established and the crop being fertilised with liquid fertiliser applied from a spraying machine. The picture illustrates the very high fertility of water in the vicinity of cereal crops causing a form of chemical pollution by nitrogen fertilisers.

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Keywords: alga, algae, algal, algal flush, blue-green, botany, chemical, chemical pollution, cyanobacteria, excess of, excess of fertilizers, fertilizer, flush of algae, nature, plant, pollution

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