Gene banks represent an overdue push to preserve crop biodiversity. It also needs conserving on farms. WITH a heavy clunk, the steel outer doors of the Svalbard Global Seed Vault closed on February 28th, shutting out a howling Arctic gale and entombing a tonne of new arrivals: 25,000 seed samples from America, Colombia, Costa Rica, Tajikistan, Armenia and Syria. For Cary Fowler, the vault’s American architect, the Syrian chickpeas and fava beans were especially welcome.