It is unlikely that the former Seaview Orchard would have been sustained, even had the college become a reality. From the 1930s to the 1950s, citrus growing in the Mapleton district gradually gave way to dairying, timber, small cropping and, in the 1950s, pineapples. The once spectacularly successful commercial citrus industry on the Blackall Range disappeared, due to a collapse in the citrus market in the early 1930s, insect damage, and competition from citrus farming in irrigated areas (such as the Lockyer Valley).