k Water treatment and agricultural chemicals, light micrograph Water treatment and agricultural chemicals, polarised light micrograph. Ferric ammonium sulphate FAS is used in waste water treatment and as an etching agent in the production of electronic components. This is mixed with potash which is a potassiumrich salt which is essential for agriculture to increase plant yield. Magnification x70 when printed 10cm wide., by KARL GAFF SCIENCE PHOTO LIBRARY Stock Photo - Afloimages
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Water treatment and agricultural chemicals, light micrograph Water treatment and agricultural chemicals, polarised light micrograph. Ferric ammonium sulphate  FAS  is used in waste water treatment and as an etching agent in the production of electronic components. This is mixed with potash which is a potassium rich salt which is essential for agriculture to increase plant yield. Magnification: x70 when printed 10cm wide., by KARL GAFF   SCIENCE PHOTO LIBRARY
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Water treatment and agricultural chemicals, light micrograph

Water treatment and agricultural chemicals, polarised light micrograph. Ferric ammonium sulphate (FAS) is used in waste water treatment and as an etching agent in the production of electronic components. This is mixed with potash which is a potassium-rich salt which is essential for agriculture to increase plant yield. Magnification: x70 when printed 10cm wide., by KARL GAFF / SCIENCE PHOTO LIBRARY

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