The height of deciduous chestnut trees is10 ~ 20m, and DBH is1m. Its bark is grayish brown and rough, and its straight-split leaves are oval. I eat chestnuts. Chestnuts have been used in my hometown for a long time. Because of the stable output of chestnuts, they have been paid great attention to since ancient times. According to the records of Qing Dynasty, the emperor of Jin Dynasty won the battle by chasing grain and steaming chestnuts to satisfy his hunger. He said that chestnuts and rice on the east side of the river were hard-core crops because of chestnut fighting and famine emergency food.

crops

Pinyin: zhuāng jia (refers to the grain crops in the field, and the crops read softly).

The first chapter of Liu Qing's Iron Wall: "There are trees on the beach and crops on the beach."

The first chapter of Yang Mo's Song of Youth: "The crops are dense and the rivers are bright."

Traditional agriculture

Traditional agronomy in China simply defines agriculture as planting crops.

"People are born in the earth and raised in the sky" (Lv Chunqiu Shenshi). In other words, agricultural production is inseparable from crops, people, land and sky.

The achievements of traditional agriculture in China are mainly reflected in these four aspects.

Crop is an agricultural organism.

Two people, namely agricultural producers.

Three places, namely land and soil.

Four days, that is, agricultural climate, also refers to various characteristics of agricultural organisms.