June+10, 5438 The agricultural activities and technical operations in Tibet included those.

Agricultural activities and technical operations in Tibet from June+10 in 5438 include: traditional agricultural activities include spring planting, summer management, autumn harvest and winter storage. Great changes have taken place in agricultural activities, including soil testing, seed selection, seedling raising, fertilization, pest control, crop sales, agricultural information control and many other links and processes.

Farming refers to agricultural production activities such as ploughing, fertilization, sowing, field management (weeding, lodging prevention, spraying pesticides, insect prevention, cold prevention, freezing prevention, drought prevention, watering, waterlogging prevention, irrigation and drainage), harvesting, harvesting, storage, and six livestock management (feeding and disease prevention).

Climatic characteristics of agricultural activities in Tibet;

"beginning of spring" is in the first half of February in the solar calendar (public) and the first half of January in the lunar calendar (lunar calendar) (leap months are out of season), so according to the lunar calendar, it is beginning of spring. "beginning of spring" is a solar term reflecting seasons and phenology, which indicates that the spring of recovery of all things has begun, the weather will gradually get warmer, and the vast land will present a vibrant scene. As the saying goes: "One day in beginning of spring, a hundred herbs sprout."

In China, January, February and March of the lunar calendar are regarded as spring. Astronomy regards the vernal equinox as the beginning of spring. In climatology, the five-day average temperature is used as the unified standard to divide the seasons in different places.

When the average temperature rises to 10℃, winter ends and spring begins. According to this standard, most of the spring in the middle and lower reaches of the Yellow River is from late March to early April, that is, around Tomb-Sweeping Day, and the four solar terms of beginning of spring, rain, fright and vernal equinox still belong to the winter category.