《天工开物·上篇·乃粒》
大麦有叫做 牟 的，也有叫做 穬 的。其他的杂麦有叫做 雀 的，有叫做 荞 的。因为播种期相近，花的形状相似，又都是磨成面粉用来食用的，所以都称作麦。在我国，河北、陕西、山西、河南、山东等地，老百姓吃的粮食当中，小麦占了一半，而黍子、小米、稻子、高粱等加起来总共占了一半。
四海之内，燕、秦、晋、豫、齐鲁诸道，民粒食，小麦居半，而黍、稷、稻、粱仅居半。
Barley has 牟 and 穬. Other杂麦includes 雀 and 荞. Since the sowing period is similar, the shape of the flower is similar, and they are all milled into flour for food, they are all called wheat. In my country, half of the food eaten by the common people in Hebei, Shaanxi, Shanxi, Henan, and Shandong is wheat, while half is millet, millet, rice, and sorghum.