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Last broadcast on Sat, 3 Dec 2011, 06:30 on BBC Radio 4.
Synopsis
Charlotte discovers some of the hidden complexities of the soil and finds out how growing food can put it under pressure, at the National Soil Resources Institute in Bedfordshire. Professor Jane Rickson, from the Institute, discusses how tilling soils can lead to erosion and compaction, and we hear how some farmers are moving away from traditional ploughing to avoid these problems. Professor Rickson also explains that the Institute is searching for new fertilisers to replace those made using finite resources like minerals and natural gas. And, she reveals why she gets excited about earthworms.
Presenter: Charlotte Smith
Producer: Sarah Swadling.
Broadcast
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Sat 3 Dec 201106:30
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