There is an interesting story about Serbia's world domination in raspberry production. Namely, an extension worker named Dobrilo Nenadić noticed in the 1980s that, when first young shoots are removed in spring, the yield in the autumn becomes much larger. After further experiments, he concluded that he could provide 3-4 times more raspberries using that method compared to conventional methods. Many producers started using this method and indeed, Serbia become extremely successful raspberry exporter. What's even more interesting is that Nenadić didn't become rich due to this discovery, yet he managed to do something else in a completely unrelated field - he became a popular novelist, receiving multiple awards for his historical novels.