Tang Ping brought a few people to the riverside, and the water truck was about to be pressed.

The keel water wheel is recorded in Song Yingxing's Tiangong Kaiyi, and it is divided into several types.

This time, Tang Ping chose the kind that was driven by wind and hydraulic power at the same time.

Although the water level of the Shanghe Village has dropped due to drought, the river water is still relatively fast.

Moreover, the wind in the northwest has always been quite strong, and this place is still a windfall.

So when the water truck is well, Tang Ping felt that it could absorb the water in the river by relying on wind and water.

As for the fields in the village, he dug a lot of ditches when he asked everyone to dig pits and composting them last month.

As long as the water can be delivered and entered into those ditches, it will be simple to irrigate the lands of Shanghe Village.

"This thing..." Li Shimin was jealous when he saw the good thing.

But there is no way. Who said that my nephew has good things here? There is no other place?

"Wang Tieniu!" Tang Ping shouted.

Wang Tieniu rubbed his hand against the clothes behind his waist, then wiped the sweat beads from his forehead, and then came up and shouted respectfully to Tang Ping: "Boss!"

"Have you learned how to do this waterwheel?"

"I learned everything if I go back to the boss!"

Who is not the kind of thing that is not the one who passes on to the son or the daughter? As a result, when he arrived at the boss, he taught him casually.

"Then give that mold to this General Li!"

"Yes!" Although Wang Tieniu was a little reluctant, he came over with a box and handed it to Li Shimin.

It contains a model bought by Tang Ping, a reduced version of the keel waterwheel.

Li Shimin and Li Jiancheng looked at each other. The civil and military officials in the court were helpless, but when they arrived at Tang Ping, they were just a casual word!

The key is that how to reward Tang Ping is now a big problem. It is not too easy to be promoted to the title of his credit.

But the few people still hoped that he could be more low-key. Now the few people came here all the way and came quietly.

Therefore, even though these credits are known to him, they cannot be declared to the world for the time being.

After thinking about it, it seems that I can only give some money.

Although I don’t know why Tang Ping needs gold, what they gave was completely in proportion to what Tang Ping gave.

"Brother Tang..."

Before Li Shimin could speak, Tang Ping said again: "It's not the time yet. You can come in a month, I'll give you some..."

Tang Ping wanted to talk about seeds, but it was not suitable to think about it, so he could only explain: "It's the kind of thing called potatoes in Hu La soup this morning. I have a way to let you plant it on a large scale."

The northwest is a seasonal planting area for potatoes. It is sown at the end of April and early May every year, and it is harvested in autumn.

If it is Hunan and Hubei, it is the second season of the Central and Southern China, it can be planted and harvested twice a year.

This is the most productive crop that Tang Ping thought of as being able to grow here.

You should know that the excellent spring wheat seeds he brought back can reach a yield of up to 500 kilograms per mu here.

The yield of potatoes can reach several times that of wheat.

"Well, that thing is really delicious!" Li Yuanji slapped his mouth. He was thinking about the thing just after eating it, but he had not had time to find an opportunity to ask.

"How is the yield?" Li Shimin is most concerned about this. The food is delicious, but if the yield is too low and just for the sake of deliciousness, it will definitely not work.

"I remember that the average yield per mu should be 3,000 to 5,000 kilograms. But if you have to give a discount, it is probably only half of it."

After all, a mu of land in the Tang Dynasty was about eight out of ten of the modern acre of land. In addition, if it was planted here, it was not as good as that of modern society, whether it was fertilizer or the prevention and control of diseases and pests.

So it would be good if Tang Ping conservatively could be half of it.

As soon as Tang Ping finished speaking, Li Shimin was shocked and almost fell to the ground.

3,000 kilograms to 5,000 kilograms, and a half-fold of more than 1,000 kilograms. Can this world really have crops with a yield of more than 1,000 kilograms per mu?

You should know that the average reflected in the Tang Dynasty or the Turpan documents is one stone to two stones per mu. The southern rice can reach three stones, which means 276 kilograms per mu.

But this does not mean that the average per mu yield of millet planted in dry land in the north has reached such a high level. In fact, the millet harvest in most dry land is still about 100 kilograms.

So if this is not what Tang Ping said, Li Shimin had already shouted "Come on".

"Tang... Brother Tang, what I said is true?" Even so, Li Shimin asked again and confirmed.

"It should be similar. This time I will plant fifty acres in Shanghe Village first. The potato planting is not about using seeds, but cut into pieces according to the bud eyes and sow the ridges!"

The so-called ridge is composed of high convex ridge platforms and low concave ridge ditches. This cultivation method was very popular in the north of the Han Dynasty, so Tang Ping didn't need to teach them anymore.

"The buds I cultivate at that time are planting fifty acres in Shanghe Village. You can take them with you so many of them. Ask the department in charge of farming in the court to try to plant them for a season first."

This kind of thing should be seen as true. After all, if you haven’t seen it with your own eyes, no one in this era can imagine that crops can have such high yields.

So it is impossible to promote it nationwide without trying it.

On the way back, Li Shimin was still dizzy, with a yield of one thousand pounds per mu!

That's a thousand pounds!

Even if Tang Ping said that it would not be delicious for a long time when it was used for food, you should know that many times due to war and natural disasters, many people may not be able to eat enough. What should I care about whether it is delicious or not? During the famine period, even the bark and grass roots must be snatched.

Why did Tang Ping have such ability in farming? Is he a disciple of the God of Farm in heaven?

However, what Li Shimin is most worried about is Tang Ping's safety. Last time someone came to report that there were people from the Wang family staring at Shanghe Village. However, because the other party did not move, Li Shimin did not touch those people, otherwise it would be clear that Tang Ping had something to do with him.

Now it seems that the two veterans, Lao Cui and Lao Du, and Lu Yi are not safe.

"Brother, take out the sword order!" Li Shimin suddenly said to Li Jiancheng seriously.

"Well, look at what we look like now. No matter how much we hide it, we can't cover his light. We use the sword order to invite the Pei family to Shanghe Village."

The so-called sword order was a great help to the Pei family when Li Tang founded the country. The Pei family gave three sword orders to the Li family.

The Pei family is the peak of the individual force of the Tang Dynasty.

I have used two of them over the years, and the last one is left.

"My third brother, go to the Pei family and use the sword order to invite the contemporary sword saint of the Pei family to come to Shanghe Village to protect Tang Ping."

"Okay! I'll exchange the telescope for me when I come back!"

"Ahem... that big brother, you can watch it at that time and let their craftsmen learn how to make new keel waterwheels as soon as possible."

"Second brother, my telescope!"

"..." Li Shimin was helpless. If the telescope was used well on the battlefield, it might even determine the outcome of a battle.
Chapter completed!