1 stone = 4 jun, 1 jun = 30 Jin, 1 Jin = 16 Liang, 1 Liang = 24 baht.
1 stone = 26400, 1 jun = 6600, 1 kg = 220, 1 beam = 13.8, 1 baht = 0.57g.
1 = 10, 1 = 10, 1 = 10.
1 Hu =20450， 1 Dou = 2045， 1 L = 204.5， 1 = 20.45 mL。
1 foot = 1 foot, 1 foot = 10 inch,1inch = 10 minute.
1 ft = 333, 1 ft = 33.3, 1 in = 3.33, 1 min = 0.333 cm.
In the book Biography of Confucius compiled by Wang Su during the Three Kingdoms period (the beginning of the third century AD), it is recorded that "the cloth refers to the inch, the hand knows the ruler, and the elbow knows the search." The arm is stretched out eight feet long. This is a search. It is also recorded that "ten feet is one foot, and people are eight feet long, so they are called husbands." It can be seen that in ancient times, inch and finger, ruler and hand, search and body were in one-to-one correspondence.
Large mu =0.69 16 mu, and small mu 100 mu, that is, 0.2882 mu.
The yield per mu is about
In normal years of Han Dynasty, the average yield per mu of millet (modern) was 94- 188 kg (modern), with an average of about 140 kg.
Wheat 100-200 kg, with an average of 150 kg.
Li Zhong-Mu of Wu Dong "cultivated more than 20 mu of rice".
It should be planted seriously, and it is the first year.
There will be no problem with the fertility of the land, and the result will be "60 hectares of rice".
Converted yield per mu is between four and six.
He also observed that "when Wu was young, there were no floods and droughts, Miao Jiafeng was beautiful but not practical, and the people were hungry. They were all happy."
It can be seen that the grain harvest in Wu Dong is relatively poor. In this way,
It should be in line with the actual situation that the grain yield per mu in Wu Dong is below six hectares.
The current acre of land is 666 square meters.
The yield per mu of rice is about 1500 ~ 1600 Jin, and the unit of measurement in Wei and Jin dynasties is 38 households.
About three buckets, and then convert the size and area of ancient and modern mu into twenty-nine buckets/mu in Wei and Jin Dynasties.
The yield of rice is 72% and that of japonica rice is 68%. Wheat yields about 750 Jin per mu,
That is, eighteen hooves and five buckets. After converting the area, it was fourteen hooves and one bucket per mu in Wei and Jin Dynasties.