I make a popular science video and all the emperors learn from it!

【Popular science continues】

【How to propagate sorghum:】

【Seed treatment: divided into seed selection and seed drying. Before sowing, carry out winnowing or screening to eliminate small, deflated and diseased seeds, and select large and plump seeds for production. At the same time, choose sunny weather and dry the seeds for 2 to 3 days. The purpose is to increase the seed bud potential and bud rate.】

【Sowing:

Sowing time: Timely sowing is the key to ensuring that the seedlings are complete, neat and strong.

Sorghum seeds are intolerant of low temperatures when they germinate. They are sown too early and germinate slowly. They are susceptible to infection by pathogens, resulting in powdery seeds or mildew. It will also increase the occurrence of smut and affect yields.

The sowing date is determined based on the growth period of the variety, ground temperature and actual soil conditions. Generally, the ground temperature in the 5 cm cultivated layer is stable at 10~12℃ and the soil moisture content is 15%~20%.】

【Sowing density: The sowing density is based on the principle of"fertile land should be dense and thin land should be sparse".

Usually 65-70 cm ridges are sown in double rows with equal spacing on the ridges. The small row spacing is 12-15 cm, the plant-to-plant spacing is 18-20 cm, and the sowing depth is 3-4.5 cm.

In low-lying wet places, it can be slightly shallower and covered with 2 to 3 centimeters of soil. In dry plots, germination should be accelerated and the soil should be covered tightly.

The depth of sowing should be flexibly controlled in different soil types. Clay soil is dense and easy to compact, so it should be sown shallowly; sandy soil has poor moisture retention, so sowing should be done deeply.】

【......】

There’s more than just literal verbosity here.

It even comes with a video.

In the video, a modern farmer demonstrates how to grow sorghum well.

The emperors of various dynasties who were originally sleepy widened their eyes.

They all shouted in unison:"How did people end up in the sky?"

Moreover, the people in the video were dressed strangely.

It’s hard to tell which dynasty they are from

【The ten crops with the greatest scientific contribution to mankind!】

【Eighth place: Sorghum science popularization completed】

【Three minutes later, all the text and videos on the light screen disappeared.

But the shock to everyone did not fade away.

The video is short but reveals a lot of information.

The road in the video is very spacious and smooth, and you can't see the end at a glance.

And what on earth is that big iron box running on the road?

The speed is actually many times faster than the carriage!

And it doesn't look like there's any bumps at all.

Several houses in the distance are even more ridiculously tall, at least dozens of floors!

This scene shocked the ancients no less than when Li Hongzhang visited foreign countries.

The voices of the emperors.

Ying Zheng: I must live forever! See that world with your own eyes.

Liu Bang: Darling, I have never seen anything so bizarre in my life.

Liu Chan: The big iron box looks fun, but there are no animals pulling it. How can it run so fast? Is there a horse hidden in it?

Li Shimin: Wait, ethanol can be used as fuel...Isn't it just the fuel for the big iron box?! ?

Zhao Kuangyin: I’m already numb. Can you give me a reward?....

Zhu Yuanzhang: We took a look today and found that Ming Dynasty was still too poor.

Kangxi: Impossible! Absolutely impossible! It’s actually more prosperous than the Qing Dynasty!......

The people of all dynasties were also stunned and stunned.

They never imagined that a place could be so prosperous.

There are even neatly paved roads in the fields.

How rich do you have to be to be so prodigal?...........................

Three minutes fly by

【The ten crops with the greatest scientific contribution to mankind!】

【Start popular science No. 7: Cotton】

【Cotton is an annual herb or perennial shrub of the Malvaceae family.】

【The characteristics are as follows: the leaves are broad and ovate, the apex is acuminate, the base is wide, the petioles are sparsely pubescent, the stipules are ovate and sickle-shaped, the flowers are solitary in the leaf axil, the pedicel is slightly shorter than the petiole, the calyx is cup-shaped, the seeds are separated and oval. Shape, with long white cotton wool and gray-white short cotton wool that is not easy to peel off.

The buds of cotton are milky white and gradually turn dark red after blooming. After the petals wither, a green fruit is left, which is the cotton boll. The cotton boll is a capsule with cotton seeds growing inside. There is a layer of hair on the outside of the cotton seeds, which will gradually grow full. to the whole boll】

【The flowering period of cotton is from June to October】

【The origin of cotton is Asan Country and Camel Country】

【Before cotton was introduced to China, there was only kapok for stuffing pillows and no cotton for weaving.】

【At that time, the clothes of the poor were made of linen and low-quality animal skins.】

【Not only does it have poor thermal insulation effect, it is also very uncomfortable to wear and often causes itchy skin.】

【And people who are a little rich will choose to wear silk and fur】

【Cotton was introduced to our country during the Southern and Northern Dynasties at the latest. At that time, it was mostly cultivated in border areas. It was not until the late Song Dynasty and the early Yuan Dynasty that cotton was introduced to the inland in large quantities. 】

A video is attached below the text.

It shows the whole process of cotton from seed to mature picking.

Chen Yu, who produced the video, even put a clip from a movie of picking cotton at Yingjiang Manor into the video.

Against the dark skin, the cotton is so white and soft.

Qin Dynasty.

Ying Zheng looked at the crops he had never seen before, feeling filled with emotion.

But who are the black-skinned humans in the video?

They picked cotton very skillfully.

Ying Zheng wanted to catch some and put them to work in Da Qin's fields.

Fusu on the side looked excited and said,"Father, this cotton is an excellent crop."

"In the Qin Dynasty, many people froze to death every winter."

"If there was cotton, people would not have to stay at home to resist the severe cold in winter."

Ying Zheng couldn't help but look at him.

Although Fusu is pedantic, he has learned all the benevolence of Confucianism.

This popularization of science is accompanied by videos.

Most of the people in the Qin Dynasty are illiterate, but there are audio explanations in the videos.

When they When I heard that the poor could only wear linen clothes and low-quality animal skins, my eyes suddenly became sore.

"This kind of linen clothing and low-quality animal skins not only have poor thermal insulation effect, but are also very uncomfortable to wear and often cause skin itching."

The voice in the video made them unable to bear it any longer.

Yes, they really can't afford silk and fur.

Every winter is a test of life and death for them.

Many children of the elderly will die in the heavy snow, even if There is no use hiding at home.