Guardian: If you’d told me a week ago that I would spend two days listening to people talk about soil carbon sequestration (and be gripped by it!) I would have laughed in your face. But at the Soil Association conference (SA) this week it was the hot topic, partly because the SA is launching a report in a month or so which will conclude that organic farming practices mean that while the UK’s soils are losing carbon at a rate of up to 1% a year, organic farmers sequester enough carbon to offset …