How a wartime food crisis permanently altered the English landscape

History · Published 3 October 2026 Swipe more like this →

In short: The rolling, springy turf of the South Downs is an iconic sight, but its famous short grass is a fragile remnant. Once covering half the eastern hills, this ancient ecosystem was nearly erased by the urgent agricultural demands of the Second World War.

For centuries, the South Downs were defined by a 'sheep-and-corn' farming system. Local farmers would confine sheep, such as the famous Southdown breed, to corn fields to enrich the soil with manure before allowing them to graze the hills. This cycle, combined with natural browsing by rabbits, maintained the thin, well-drained chalk soils and created the short, springy 'old chalk grassland' that characterizes the region today.

This delicate equilibrium was shattered during the 1940s. Driven by the need to boost domestic food production during the Second World War and continuing into the 1950s, government measures encouraged farmers to plough up vast areas of grassland for arable crops. The ecological cost was staggering: while this ancient grassland once comprised 40-50% of the eastern Downs, only about 3-4% survives today.

The landscape is also a geological marvel, formed 66 to 100 million years ago during the Cretaceous Period. The chalk itself is composed of the microscopic remains of marine plankton from a shallow prehistoric sea. Over time, the Alpine Orogeny folded these strata, creating the Weald-Artois Anticline. Erosion eventually stripped away the center of this dome, leaving the steep north-facing escarpment of the South Downs and its counterpart, the North Downs, separated by the Weald.

Today, the area is protected within the South Downs National Park, which officially began operations on 1 April 201, following a long period of advocacy and public inquiry. As the UK's most visited national park, it draws an estimated 39 million visitor-days every year, serving as a vital refuge for both biodiversity and recreation.

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