 The dumpling dish, "mandu", grilled meat dishes, noodle dishes, and the use of seasonings such as black pepper, all have their roots in this period.Agricultural innovations were significant and widespread during this period, such as the invention of the rain gauge during the 15th century.During 1429, the government began publishing books on agriculture and farming techniques, which included "Nongsa jikseol" (literally "Straight Talk on Farming"), an agricultural book compiled under King Sejong.