Towards the end of the Western Han dynasty, China's first dedicated book about agriculture was produced, the Fan Sheng Zhi Shu. This contained a description of "separated field farming," a technique for improving dryland yields that was claimed to produce 100 piculs of grain for every mu of land--far more than conventional farming could achieve at that time.
西漢末年，也出現中國第一本農業專書《氾勝之書》，氾勝記載了旱作地區最早的一套豐產技術「區田法」，能「畝收百石」，遠遠超出當時農地的生產量。