19th May 2008, 03:38 PM
Parts of Britain (mainy upland areas) have been deep ploughed for forestry at well - huge swathes of the Southern Uplands and Highlands of Scotland, bits of Datmoor for example. Where survey was doine in advance it invariably turned up archaeology but very little of it was actually systematically surveyed.
Anoer destructive ploughing practice in British farming is de-stoning where the top 300mm of soil is passed through a seive to remove stones - mainly for growing root crpos where stones mar the perfection of the supermarket carrot - but the bulk of the stones is removed so the next ploughing goes a little deeper into the undisturbed sub plough layer.
Added to this every hectare of field loses a few tonnes of soil with the roots at harvest - again leading to deper penetration o the plough into undisturbed layers.
Anoer destructive ploughing practice in British farming is de-stoning where the top 300mm of soil is passed through a seive to remove stones - mainly for growing root crpos where stones mar the perfection of the supermarket carrot - but the bulk of the stones is removed so the next ploughing goes a little deeper into the undisturbed sub plough layer.
Added to this every hectare of field loses a few tonnes of soil with the roots at harvest - again leading to deper penetration o the plough into undisturbed layers.