Li Anji's idea is consistent with Li Longji, as long as the indigenous civilizations of the Americas obediently submit to the Tang Empire, the Tang Empire can treat them well and use their indigenous manpower to better build the Americas for the Tang Empire. Pen, fun, and www.biquge.info

The ultimate goal of the Tang Empire is to take over the entire American continent, expand the land area of the Tang Dynasty several times, and obtain more products and resources, which is the established national policy of the Tang Empire, and no one can stop it.

After leaving the palace, Ang Lee began to redeploy the R&D direction of the R&D center, focusing on the research and development of marine ships and railway systems, and all other projects were left behind, in line with the current established policies of the Tang Empire, so that the Tang Empire could develop more rapidly.

As long as you are willing to invest and spend time and energy, the research will definitely bear fruit, and soon, more advanced locomotives and more advanced and reliable steam turbines will be developed.

The new locomotives are more powerful and can achieve higher speeds to speed up the railway system, while the new steam turbines are larger to provide more power and meet the capacity to build larger tonnage ocean vessels.

These newly developed scientific research projects were quickly mass-produced, and due to the high demand for railways and ships, the old models were not eliminated, but continued to be used.

At the same time as scientific and technological research and development, the various crops brought back from the Americas have entered the harvest season, and the emperor personally led the ministers to the royal fields to personally verify how much sweet potatoes per mu that Li An said can yield 10,000 catties per mu.

These sweet potatoes and corn and other crops are planted in greenhouses, and when the weather is hot, the top of the greenhouse is completely open, and even, when the sun is particularly strong, it is necessary to build a sunshade to reduce the damage of sunlight to plants.

According to Li An's estimate, after the most careful care of sweet potatoes, even if the yield per mu does not reach 10,000 catties, it is not much worse, in short, the yield is definitely much higher than other crops in Datang, or even more than ten times.

"Your Majesty, these sweet potatoes have been taken care of differently, and the yield must be different, now, let's take a look at the sweet potatoes first, this crop has the highest yield."

Li Ang opened his mouth to suggest, and took Li Longji to the area where sweet potatoes are grown.

As soon as I walked into the sweet potato planting area, I raised my eyes to see all the lush sweet potato vines, which looked very beautiful, although it was already the harvest season, the sweet potato vines had become old, and there was no verdant spring and summer, but it was still very good, at least most of them were still green.

The emperor and the ministers, while looking at these lush sweet potato vines, discussed the yield of sweet potatoes per mu with great interest, some believed in Li An, and felt that these sweet potatoes must have a yield of 10,000 catties per mu, but some ministers did not think so, they felt that the data Li An said was a little too exaggerated, and the yield per mu of 10,000 catties was impossible to achieve.

In short, there are all kinds of discussions, different ministers have different opinions, no one can convince anyone, everyone is waiting to see the results, only when all the sweet potatoes are harvested, and weigh the weight, can we determine how much production capacity per mu can be reached.

"There are a lot more sweet potato vines than when they were first planted, I don't know if you can really harvest an acre of ten thousand catties below, let's start!"

Li Longji sat in a relatively comfortable position under the sun, and opened his mouth to order, so that the people who worked immediately began to harvest sweet potatoes.

Since sweet potatoes are planted in large quantities, and they are divided into five situations, and the level of care and fertilization is different, it is necessary to harvest them separately to find out the yield that can be achieved under each planting condition.

And when it comes to harvesting, of course, it starts with the lowest yield.

Since the emperor was present at the scene in person, it was natural that the emperor could not be made to wait for a long time, so that there would be a lot of people to do the work.

The agricultural technical officials of the imperial court allocated more than 100 people to carry out the operation of harvesting sweet potatoes on the spot, and these 100 people were divided into ten groups, each group of ten people, responsible for the area of one land.

More people are powerful, more than 100 people work together, and soon harvest the sweet potatoes of an acre of land, in addition, in order to prevent omission, there are dozens of people in the field to turn the soil, and from time to time find a small amount of sweet potatoes.

"Your Majesty, it should be almost, even if there are still in the fields, there are not many left."

Li An opened his mouth and motioned for the emperor to order the weighing.

Li Longji nodded and said, "Okay, it's almost over, let's start weighing!" ”

As soon as the emperor ordered, the officials of the agricultural department began to weigh the sweet potatoes.

"Your Majesty, a total of three thousand five hundred catties, a bumper harvest!"

An official from the agriculture department said excitedly.

"Three thousand five hundred catties, there are so many, and they are the least cared for."

"Three thousand five hundred catties, which is ten times higher than the yield of wheat, is really a good thing! If all the land in the Tang Dynasty were planted with sweet potatoes, there would never be a famine again. ”

"But this sweet potato is wet and heavy, so many sweet potatoes, how to store them? If you leave it for a long time, mold will rot. ”

When the ministers heard about the yield of sweet potatoes, they immediately felt very happy, but at the same time, they were also worried that sweet potatoes would not be easy to preserve and would rot over time.

Li An heard the conversation of these ministers, and immediately ordered someone to find some sweet potatoes with better appearance, and clean them, and then in front of everyone, he personally cut the sweet potatoes into round slices, and said: "Your Majesty, sweet potatoes are easy to rot, so if you want to store them for a long time, you must cut them into round slices and dry them in the sun, so that they will not rot for three or five years, and even for a longer time." ”

"Just cut into thin slices like this? In this way, how much is left of a hundred catties of sweet potatoes dried into dried sweet potatoes? ”

Li Longji opened his mouth and asked, about dried sweet potatoes, Li An had already said it, but he still had to ask one more time.

"Your Majesty, a hundred catties of fresh sweet potatoes can be dried for about twenty-four catties to twenty-six catties, with an average of twenty-five catties."

Ang Lee replied.

Before coming to Datang, Li Ang had heard the older generation say many times that in the era of food scarcity, sweet potatoes were the staple food of all families, and about the relevant knowledge of sweet potatoes, Li An was naturally familiar with it, and even the types of sweet potatoes could be clear.

"One hundred catties of fresh sweet potatoes can dry twenty-five catties of dried sweet potatoes, so that three thousand five hundred catties of sweet potatoes can dry nearly 1,000 catties of dried sweet potatoes, which is really a lot! It is higher than the yield of any crop in my Datang. Moreover, it is still an acre of land that is barely cared for. ”

An official of the agricultural department said excitedly that he was personally responsible for taking care of all the experimental fields, so he knew best about the situation of each acre of land, and nowadays, the least acre of barren land can have a yield of 3,500 catties, so if you take care of some fields, you will definitely be able to produce sweet potatoes with higher yields.

Li Longji was very satisfied with the yield of sweet potatoes, and continued to let people harvest the sweet potatoes in the next acre of fields to see how much sweet potatoes could yield per mu if they were taken care of.

Soon, the sweet potatoes in the following acres of fields were all harvested, and the yields were 5,000 catties, 6,000 catties, 6,500 catties, and 8,000 catties, that is to say, the sweet potatoes with the highest yield reached 8,000 catties per mu, which can be said to be a very high yield.

"Eight thousand catties, ten thousand catties is already very close, even if it is dried, it is enough to have two thousand catties, ten times that of ordinary crops, this sweet potato is very good, it is worth vigorously promoting in Datang, in the future, I Datang will no longer have to worry about famine."

Li Longji was very happy, happy that Datang could have such a high-yield grain crop, and the ministers were also very happy, and congratulated each other to celebrate Datang's discovery of excellent grain crops.

The highest yield of sweet potatoes per mu is 8,000 catties, this news soon spread in the capital, all the people of the Tang Dynasty, heard that sweet potatoes have such a high yield, they were all surprised, and ran to tell each other, the news to the people they knew, and soon spread to the far away states and counties.

Who wouldn't want to grow high-yielding food? Even if there is no food shortage crisis in Datang at the moment, it is always good to store more food, many people in Datang, especially the poor people, have almost all been starved, and have a deep fear of the food crisis, and they can prepare more food, which will make them more at ease, and at the same time, they can also have a way to survive in a disaster year.

In the following days, the corn and potatoes also entered the harvest period, and Li Longji visited the scene every time to show the emperor's importance to agriculture.

The yield of potatoes and corn is also a lot, much higher than other crops in Datang, although the yield of sweet potatoes is the highest, but it can not only be the same as sweet potatoes, so that the nutrition is unbalanced, a variety of crops are planted together, in order to better improve the nutritional structure of the people of Datang.

Sweet potatoes, corn, potatoes and other crops have been unanimously approved by the Tang Emperor and ministers, so the next step is to promote the problem of the whole country, and the promotion of these food crops must be carried out by someone in charge.

Ang Lee, who knows most about these American crops, is of course the most suitable candidate, but Ang Lee's main job is to develop various high-tech products, and he can't take care of a minor industry like agriculture, after all, people's energy is limited, and it is difficult to take care of one end and the other.

There were many agricultural experts in the Tang Dynasty, and there were also many agricultural officials, so it was most suitable for them to be responsible for promoting the crops of the Americas, and for this kind of job that would easily go down in history, any official in the agricultural department would be very happy to accept this job.

The work of promotion was quickly arranged, and many officials were vying for this job, and the common people, after hearing that the yields of several crops in the Americas were extremely high, were also very cooperative with the officials of the imperial court, and were very happy to accept the crops of the Americas, and planted a large number of American crops in their own fields.

In addition, in order to better popularize the high-yield crops in the Americas, the imperial court will send a larger fleet to the Americas to transport these crops, and at the same time, transport 10,000 soldiers and their families to the Americas, and establish three cities on the land of the Americas.

Time flies quickly, when the New Year is approaching, there is very exciting news in the south, the Ezhou Yangtze River Bridge has been completed, the railway line is also paved to Ezhou, and through the Ezhou Yangtze River Bridge, it has extended fifty miles to the south.

When the news reached Chang'an City, all the people of the capital were boiling, and the construction of a railway bridge over the Yangtze River, with such a large span and such a large scale, was unique in any era, which reflected the strong industrial strength of the Tang Empire.

The railway bridge is run through the whole line, such an important thing, of course, you have to see it with your own eyes to be enjoyable, so, after getting the news, many rich nobles and royal idlers rushed to Ezhou by train to witness the grandeur of the Ezhou Yangtze River Bridge.

After seeing the model of the railway bridge of the governor of Ezhou, the emperor was so excited that he didn't sleep well for a few days, and resisted the pressure of the ministers, and desperately wanted to take the train to Ezhou to inspect.

On this trip, the emperor was in a hurry, and only gave the relevant entourage three days to prepare, and for this reason, many departments were busy and dizzy.

As the designer of the Ezhou Yangtze River Bridge, Li An of course also has to accompany him, which is certain, and before leaving, a lot of work in the R&D center must be arranged accordingly in advance, so as not to let these R&D talents not know what to do next.

Since Datang does not yet have a high-tech means of contact such as telephone, the railway from the capital to Ezhou is still unable to open, and can only arrive in Luoyang City first, and then transfer from Luoyang City to Ezhou, only in this way can it facilitate the policy operation of the railway system.

Of course, the emperor's travel is an exception, as the king of a country, the emperor needs to have his own royal train, so he can't change at will, but he also has to go to Luoyang City Railway Station first, and then, after changing the rails of the railway, he can further march to Ezhou.

Three days later, the emperor's royal train departed from Chang'an City on time, and most of the ministers of the entire imperial court accompanied it, escorting up to 30,000 soldiers and horses, and all of them were elite soldiers and horses, and even the most elite ironclad artillery car troops in the capital were also mobilized to accompany them.

However, the ironclad artillery car did not travel on land, but was loaded on a freight train, which could greatly improve the efficiency of the operation, and the speed could keep up with the imperial train of Emperor Li Longji.

In less than a day, the emperor's royal train arrived at Luoyang City Railway Station, and after a night's rest, it set off for Ezhou the next day.