File:Two of the lime kilns at Porth Clais - geograph.org.uk - 1516386.jpg
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| Description |
English: Two of the lime kilns at Porth Clais Limestone was brought in by boat, burnt in the kilns on the quayside to produce lime which was spread on the fields nearby, the resulting increase in pH (alkalinity) was sufficient to liberate mineral nutrients thereby increasing the fertility of the soil. Subsequent imports of guano rendered this obsolete and in turn was rendered obsolete by the Haber process for the chemical fixation of nitrogen. |
| Date | |
| Source | From geograph.org.uk |
| Author | Dr Duncan Pepper |
| Attribution (required by the license) | Dr Duncan Pepper / Two of the lime kilns at Porth Clais / |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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_heading:135.00&language=en){kind=link}
| Object location | | View this and other nearby images on: OpenStreetMap | |
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_heading:135.00&language=en){kind=link}
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Dr Duncan Pepper and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Dr Duncan Pepper
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:32, 3 March 2011 | | 640 × 480 (113 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Two of the lime kilns at Porth Clais Limestone was brought in by boat, burnt in the kilns on the quayside to produce lime which was spread on the fields nearby, the resulting increase in pH (alkalin |
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