Spoiling History: Starting from the Three Kingdoms

[Tang Chao said this is not over yet.

The warm and humid climate also benefits water resources in the middle and lower reaches of the Yellow River, which also makes agricultural irrigation and fishery resources quite abundant.

The shortening of the cold period extends the time suitable for crop growth. This does not even require specific documentation. Records can be found in literary works from the Tang and Song Dynasties.

Wheat harvesting time was in April in the Tang Dynasty and in May in the Song Dynasty.

The earliest records of the two-crop system in ancient times were also seen in the Tang Dynasty. Although this fairly advanced agricultural technology may not have been fully rolled out, it can still increase considerable grain output.

From this, we can simply summarize that although the temperature changes by only two degrees Celsius, the changes it brings are overwhelming.

It allowed the Tang Dynasty to have the largest cultivated land area and pleasant climate among all dynasties, and thus obtain abundant food output and natural resources, and ultimately created the magnificent Tang Dynasty with a level of prosperity that shines brightly in the annals of history.

But it is also because of this that the Tang Dynasty's waste of natural resources may be regarded as the highest among all dynasties. 】

Liu Bei was really in a daze at this moment.

He stretched his head and looked at the window.

This General's Mansion is a relatively well-preserved mansion in old Chang'an. After simple repairs, you can still get a glimpse of the grandeur of the past, such as the two glazed windows that provide good lighting and ventilation.

At this moment, through this window, Liu Bei could clearly see that the leaves of the tree in the courtyard outside were not very big at this time, and it was obvious that it had not taken long to pull out the leaves.

It's the end of April now, but you can still feel the chill of winter when you go out.

But at the same time, in the Tang Dynasty, all the wheat had been harvested...

At this moment, Liu Bei suddenly was not surprised or envious of the abundant martial virtues of the Tang Dynasty. He just wanted this favorable climate.

Just now, after Kong Ming finished transcribing it, he briefly told him the simple meaning of the climate change map, and Liu Bei also saw it clearly:

What they will face in the next hundred years is irreversible climate cooling, and the environment in the north will only become more and more severe.

Kong Ming suggested in a low voice that he might try to develop the south in advance in the future, and at the same time build a strong army and strong city on the Yellow River to deter the barbarians and get rid of their evil intentions.

In this environment, Liu Bei sincerely envied the climate.

Can rice be grown north of the Yellow River? Liu Bei said he didn't dare to think about it.

However, Kong Ming couldn't care less about what to say at this time, because he was busy copying the relevant words of Man Shu.

Next to them, Pang Tong and Fazheng also breathed a sigh of relief. At least they were no strangers to agriculture now.

This method of double-cropping rice and wheat is called advanced by future generations. So it seems that this method will also be used by future generations?

Pang Tong is now very sensitive to these words that are commonly used by later generations, and he attaches great importance to this farming method based on just two words.

Fa Zheng has been stationed in Hanzhong for a long time. Now he has become a lot darker, but he is also more familiar with agriculture:

Later generations were able to give a concise and comprehensive summary called the two-cropping system. It can be seen that this double-cropping method is by no means limited to rice and wheat.

And since it can be weighed, it shows that it is widely used. The climate in later generations was not as warm as this Tang Dynasty. Even if rice can be grown, it must be quite laborious.

Maybe you can set up a field and test it to see if wheat, beans, etc. can be cooked twice.

Kong Ming nodded slowly and said:

Then you have to be diligent and filial.

The prospects of these two cropping methods can be seen at a glance, but they do not have the magical theories of later generations, and it is difficult to understand the subtle principles of various crops.

Therefore, if you want to get two crops besides rice and wheat, you can only use the stupidest method and try slowly.

Since Fa Zheng can see it so clearly, he just dispatches it.

Fa Zheng had no objection. To tell the truth, leaving Hanzhong to assist Xuande Gong in reviving Guanzhong was exactly what Fa Zheng wanted to do.

After all, he was born in Youfufeng, and he was an out-and-out Sanqin native. How tiring was it to return to his hometown in fine clothes?

After simply assigning the matter, Kong Ming felt that he could probably imagine what would happen next.

Such a favorable climate must have made it easier for vegetation to grow, and the population was sparse after the troubled times of the early Tang Dynasty.

Under such circumstances, it would be difficult for officials of the Tang Dynasty to pay attention to felling trees.

As the climate changed, the consequences of such carelessness quickly backfired on the Tang Dynasty.

Kong Ming deeply believed that the predecessors cut down trees and future generations suffered.

And it seems that the Tang Dynasty did not need to wait for later generations, the current dynasty had already responded to the disaster.

…

The disputes in the Bianjing Hot House took a break. Zhao Guangyi rubbed his shoulders and sat down carefully. Zhao Kuangyin still had anger on his face, but no one could see it because it was too dark.

And listening to Guangmu's simple narration, Zhao Kuangyin was also envious from the bottom of his heart.

Now he knows the difference between the Song Dynasty and the Tang Dynasty in terms of farming.

I just didn't expect that there could be such complicated things behind the simple the weather is getting colder.

Therefore, it is inevitable to be like Liu Bei, and I imagine in my heart that if I can be like this Tang...

Then he saw that Zhao Pu's face was even more bitter than his - Zhao Pu's face was fairly fair and his expressions could be clearly seen.

Although the climate is not as good as that of Tang Dynasty, it...

Before Zhao Kuangyin finished speaking, Zhao Pu shook his head and uttered two words in a hesitant voice:

Yellow River.

So Zhao Kuangyin was instantly alert.

Just now he was only focused on the benefits of the Tang Dynasty, and almost forgot about the big trouble left by the Tang Dynasty: the Yellow River.

Light Screen said it simply, but when he thought about it at this moment, his whole spine was running cold: treating the symptoms but not the root cause.

The meaning of this is very simple and straightforward, but the subsequent meaning is probably that the entire Song Dynasty will have to fight with the Yellow River.

Oh no, the Southern Song Dynasty seems to have lost the Yellow River...

Zhao Kuangyin's already dark complexion turned as dark as the bottom of a pot. The reason was very simple:

Bianjing City is right on the edge of the Yellow River.

How to face the Yellow River is probably an unprecedented problem.

…

And Li Shimin simply couldn't accept it. After all, he had openly ridiculed the weak Song Dynasty before, thinking that it was not suitable to succeed the Tang dynasty.

As a result, it now seems that the reason for the Song Dynasty's weakness was actually the Tang Dynasty?

This is absolutely unacceptable to Li Shimin.

Starting tomorrow, we will go to investigate the coal mines in Datang!

What later generations said may be sensational, but with the help of the picture of climate change, he also understood:

This climate can last for at most two hundred years, and the subsequent colder climate will not be changed by the will of the emperor or the Khan.

Nowadays, the history of the Tang Dynasty has slowly changed. The Tang Dynasty may survive for another hundred years, or it may end prematurely due to some accident.

But in short, these people always have to think about their children and grandchildren.

After all, even if dynasties change and the emperor moves, it is still the Chinese people who thrive on this land.