OKyushu says that there is a big problem that is that it is difficult to verify.

After all, in this era, Xu Fu and Zhao Si are people who have really set foot outside Kyushu, and even only Zhao Si has carried out the feat of traveling around the world.

After the First Emperor asked, he didn't say anything more, the significance of this world map was more of a supplement to the Great Kyushu theory, rather than the future direction of Great Qin's conquest.

Of course, the premise is that the teenager who is built in front of him does not deceive people.

The First Emperor handed the map to Meng Yi beside him, and then looked at the crops on the ground covered in dirt.

"What is this?" The First Emperor asked.

This substance is named sweet potato, both raw and cooked can be eaten, the raw food is sweet and crisp, the cooked food taste is soft and glutinous, the taste is sweet, and it also has the purpose of ventilation and satiety. The yield per mu is hundreds of catties! ”

"This thing is named by the people, and it is full of food, which can be used as rations, and the cooked food is fragrant. The yield per mu is also hundreds of catties! ”

"This substance is named corn, which can be the staple food, and although the yield per mu is inferior to that of sweet potatoes and potatoes, the yield is more than that of ordinary agricultural species."

"This thing is named chili, the taste is spicy, excellent, and the food is very beautiful!" A smile appeared on Zhao Si's face.

When Zhao Si returned from his trip to sea this time, in addition to collecting sweet potatoes, potatoes, corn, he collected a large number of edible vegetables, spices, fruits, and seeds.

Although Zhao Si did not study history very well, he also knew that before the Han Dynasty dug through the Western Regions, the agricultural and sideline products and condiments of the Central Plains were relatively simple.

For example, pepper, grapes, walnuts, carrots, pepper, beans, spinach, cucumbers, pomegranates, etc. were all introduced to the Central Plains through the Silk Road.

And the origin of pepper corn and sweet potato potatoes is even more distant in the Americas.

In fact, the current Central Plains can only be called livable, and the degree of development and civilization far exceeds that of other regions, but the land and resources have to wait until the Han and Tang dynasties repeatedly opened and expanded, and a large number of agricultural and sideline products were introduced and cultural exchanges were carried out.

And these things, Zhao Si values all kinds of fruit seeds and spice vegetable seeds the most.

It is worth mentioning that many fruits eaten in modern times are selected through artificial breeding.

Therefore, in fact, the fruits that Zhao Si found in this era did not taste as good as modern ones, and some of them were even difficult to swallow, so they looked like they were related to each other.

Most of them are sour and astringent, and the water is not as abundant as modern fruits, and the edible parts are not as much as modern ones.

Agricultural and sideline products are also part of the taming of nature by humans.

How can any fruit happen to grow on the human taste, but it happens to be edible, and it tastes okay, and after a long time of manual selection, the taste is sweeter, the water is more, and the fruit is larger, it will be left to continue to sow seeds.

In modern times, the development of science and technology has brought about earth-shaking changes, and there will even be some fruits on the market in terms of taste and even appearance, and wild fruits are almost two species.

Most of the seeds brought back by Zhao Si now belong to wild seeds, and they have basically not been artificially cultivated.

In addition to some spices and vegetables that are more suitable for human taste, a large number of fruits need to be cultivated over time.

In short, even if Zhao Si continues to plant at this stage, the fruits harvested are likely to be small and unpalatable.

In primitive times, it is a truth that humans tamed wolves into dogs over a long period of time.

Compared with the three new rations of sweet potatoes, potatoes and corn, Zhao Si obviously attaches more importance to spices such as chili peppers.

It's normal, after all, there are no sweet potatoes, potatoes, and corn There are other crops in this era, hemp, millet, millet, wheat, and soybean, in short, Zhao Si will not die of hunger.

The significance of high-yield crops such as sweet potato, potato and corn is more of universal significance, which will have a relatively large impact on the agricultural ecological pattern of Zhuxia.

And the meaning of condiments such as chili pepper and pepper for Zhao Si is relatively straightforward.

As a Sichuanese, Zhao Si can be said to be spicy and unhappy.

Before peppers came to the Central Plains, there were only seasoned agricultural and sideline products such as peppers and leeks in the Central Plains.

Compared to the direct stimulation of the taste of chili peppers, these are inferior by three points.

However, from the perspective of the First Emperor, even if he could clearly feel Zhao Si's love for crops such as chili peppers, his attention was still on sweet potatoes and corn.

"Yield per mu, how many hundred catties?" The First Emperor repeated.

The Qin Dynasty, although it was the beginning of great unification, was mostly a conflation of the Spring and Autumn Period and the Warring States.

Although intensive farming was also adopted during this period, it was far inferior to later generations in terms of seeds and cultivation experience.

During the Qin Dynasty, the grain yield per mu generally stayed at about 100 catties.

The yield per mu is 120 catties upwards, and the upper 150 catties are considered to be effective in farming, and the upper 150 catties will burn high incense.

As for the Song, Ming and Qing dynasties, without the influence of natural disasters, the average yield per mu of 200 catties has become a norm.

Zhao Si knew that the seeds of 2,000 years ago were different from the seeds of 2,000 years later.

It is the norm for modern sweet potatoes to yield three or four thousand catties per mu, and some areas can even achieve a yield of eight thousand catties per mu......

But that's based on the fact that pesticides, fertilizers, and even the seeds themselves have undergone scientific artificial cultivation.

Therefore, Zhao Si only dared to say less.

These things mean a lot, and it's better to say less about them than too much.

After all, compared with the average grain yield of 100 catties per mu in this era, a few hundred catties is also an astronomical figure.

"About? Five hundred pounds or less? "Zhao Si is very conservative, he didn't even say a thousand catties per mu.

500 pounds up and down...... What is this concept?

This means that, if it is universalized, the number of people starving to death will be reduced by more than half all day.

From the perspective of the First Emperor, a grain crop with a yield of 500 catties per mu undoubtedly contributed to the rule of the Qin Dynasty and increased the stability of the regime.

"Five hundred pounds at most?" The First Emperor even asked more.

"About five hundred pounds." Zhao Si opened his mouth and replied.

The average yield of 500 catties is very high, and the highest yield of 500 catties is a lot of moisture.

People and people cannot be generalized, and neither can food and food.

During the Qin Dynasty, after the Shang Dynasty reformed the law, production was encouraged, and it was already recorded at that time that some people could produce 250 catties per mu.

After the successful construction of Dujiangyan, the highest yield per mu even reached 317 catties.

I don't know if there is water or not, but at that time, the average yield per mu in the Qin region was still just over 100 catties. This is still due to the Qin State's system of cultivation and warfare, and there are rewards and punishments for farming, so the agricultural production efficiency and technical level are higher than those of the Six Kingdoms.

And now that the first emperor ruled the world, there are even many areas with a yield of less than 100 catties per mu.

Objectively speaking, after the Qin Dynasty unified the world, the average yield per mu dropped by about 10 to 20 catties.

Grain production also varies greatly from top to bottom, and only the average value is the most reliable.

The average yield per mu is 500 catties, what is the concept in this era?

"Such crops? Can you manipulate it? "The first emperor subconsciously thought that this was a relatively expensive crop with higher requirements for growing conditions.

There is no way, the yield per mu is too large, and the conditions are not high, and it always feels unreal.

"It's so easy to feed!" Zhao Si grinned.

Even the First Emperor had a great limit in the face of unknown information.

The yield per mu is 500 catties...... It's just Zhao Si's conservative statement.