Generally speaking, before the 1980s the focus of agriculturalists was on improving production and increasing the strains 'ability to withstand heat and disease, whereas since the 1980s the emphasis has been on improving quality, to make the cooked rice as succulent, firm, and delicious as possible.
大致而言，民國七十年代前技術改良的重點在於提高產量、增加稻種的抗熱病能力；七十年代後的目標則放在改進米的品質，讓米飯更為香Ｑ好吃。