Rice farming in Korea is said to have begun at the end of the Neolithic Age, around 2000-3000 BC. After that, rice farming was transmitted in a very primitive way until the Three Kingdoms period, and water supply technology was spread around the 1st and 2nd centuries after the founding of the Three Kingdoms. In this way, considering many records on rice farming in Baekje in 『Samguksagi』, rice farming may have progressed to some extent during the Three Kingdoms period. However, it is said that it was from the Joseon Dynasty that rice actually appeared as a staple food for the people. As a result of many agricultural land rights policies that emphasized sanitation from the early Joseon Dynasty, rice production continued to increase, making rice a staple food for hundreds of years.
In order to grow grain and use it efficiently, length, volume, weight, and tools to measure them were needed.
Weights and measures refer to length, volume, weight, and tools such as rulers and scales to measure them. Since this is an important criterion for maintaining human communal life, it was necessary to institutionalize it. When did weights and measures begin? There is no exact answer to this question, but at some point humanity must have had a quantitative grasp of the various objects. The combination of the concept of number and quantity must have originated from human need and wisdom, but it must have been gradually prepared over a very long period of time from prehistoric times, not suddenly used.
A hop unit is a unit of measure for area and volume according to the metric system. As an auxiliary measurement unit of area, 1 hob is 1/10 stage or 1/10 pyeong, and 1 hob is 1/10 doe, 180mL as an auxiliary measurement unit of volume.
Rose wood, Hanji
No. 106 Intangible Cultural Property of Caligraphic Engraving (Gakjajang)