麻豆约拍

A disease that causes needles to change colour and fall off Christmas trees is starting to cause serious problems for some growers. Experts are still trying to understand the exact causes of Current Season Needle Necrosis (CSNN), and one British grower has lost up to a third of this year's crop. Caz Graham hears the latest from Colin Palmer, who advises the British Christmas Tree Growers Association on this puzzling condition.

Also on the programme, a Staffordshire farmer who farms 700 acres of parsnips and Professor Charles Godfray on why he believes 'sustainable intensification' is the key to feeding a growing population.

Presented by Caz Graham and produced by Rich Ward.