Significant to the 
history of agriculture, Chinese author Jia Sixia writes the treatise "Chimin Yaoshu" in this year, and although it es 160 previous Chinese 
agronomy books, it is the oldest existent Chinese 
agriculture treatise. In over 100,000 written 
Chinese characters, the book covers land preparation, 
seeding, cultivation, 
orchard management, 
forestry, 
animal husbandry, 
trade, and culinary uses for 
crops.