Hedgehogs have been moved up the red list of threatened species by the International Union for Conservation. The IUCN says the European Hedgehog is in worrying and widespread decline, and it has moved it from "least concern" to "near threatened". We ask the Mammal Society why hedgehogs are a cause for concern. All week we're digging down into the subject of soil. Northern Ireland is running one of the most comprehensive soil nutrient sampling schemes that any country has ever undertaken. The £37 million 'Soil Nutrient Health Scheme', funded by the Department of Agriculture, Environment and Rural Affairs aims to sample nearly every one of Northern Ireland's 700,000 or so fields. It's believed the results could help farmers improve their soils, better manage nutrient application and reduce nutrient loss to water bodies, not least Lough Neagh.   Many crops have suffered with the wet weather this year. For vineyard owners, the wet has encouraged detrimental diseases and low yields. For organic wine producers, the options to combat the effects of a wet summer are minimal. We visit a vineyard where this autumn's harvest is half what it should be, because of the weather. Presenter = Anna Hill Producer = Rebecca Rooney