Southdown sheep wool and cereals due to rising volumes of imports from the British Empire was accompanied by the Wet Years - a six-year period of cold, wet weather with little sun. In the Second World War, the South Downs were commandeered for military training, only fringe farms being left to produce milk for the towns. Sheep farming declined further after the war, although it is now being encouraged again through the designation of the downland as an environmentally sensitive area, and the restoration of arable land to sheepwalk. The Southdown has been placed on a watch list by the Rare Breeds
Avondale–Southdown Line an agreement with the NZ Transport Agency over a land swap needed for a realignment of the highway and railway corridors. Another proposal exists to connect the Onehunga Branch at Galway Street to the Avondale—Southdown line by building a tunnel under Onehunga Mall to meet Hugh Watt Drive (State Highway 20) before connecting to the proposed route at Hillsborough. In May 2007 the Auckland Regional Transport Authority (ARTA) announced that it had formed a study group with ONTRACK to investigate the feasibility and costs for the section between Captain Springs Road in Southdown and Hillsborough Road in Mount Roskill. Avondale–Southdown