The craftsmanship of the military craftsman is still beyond doubt.

Several warcraftsmen worked together, and the division of labor worked together, and it was done in about half a day.

It is an experimental product in itself, so it is not so harsh, and there is no need to consider long-term use.

The straight plow is changed to the curved wheel, and the big plow becomes the small plow.

The first curved plough was born in this era.

"Let's give it a try!" Wang Li was even more excited than Zhao Si, urging the soldiers to set up the cattle cultivation experiment.

Start plowing the land directly next to the plough for comparison.

On one side is a straight plough with two oxen lifting bars, and on the other side is a curved plough pulled by a single ox.

Under Wang Li's orders, a total of three old oxen began to march with heavy steps.

Zhao Si and Wang Li followed behind to observe carefully.

The old cow walked around for a long time, and Zhao Si silently followed behind to observe the depth of the soil.

At a distance of about 100 meters, Zhao Si observed that the difference between the depth of the soil is not particularly large, in comparison, the straight plough eats the soil deeper, but the depth fluctuates greater, if it encounters a soil boundary with relatively hard soil, or there are rhizomes, it is easier to float.

The Quyuan plough eats the soil slightly shallower, but the soil does not float much, compared with the straight plow, it is obvious that the force is more balanced, and the power transmission is more stable.

In terms of speed, the curved plough did not hang the straight plow, on the contrary, the speed of the straight plough was faster.

Ploughed until the head of the ground turned around, Zhao Si looked back and found that the traces of the straight plough were also straighter.

When it's time to turn around, the light curved plow obviously makes a U-turn with less effort, while the long straight plow requires a lot of effort, after all, the weight is here.

Back and forth, objectively speaking, the Quyuan plough did not hang the long straight plow, and Zhao Si frowned.

Even Wang Li asked with some curiosity: "I see that this Quyuan plow does not seem to be faster than the straight plow." ”

Not only is it not as fast as the straight plow, but it is more than a quarter slower.

Zhao Si was thinking about what was wrong, but found a group of military craftsmen greeted him with a happy face.

The craftsmen of this era may not have understood the so-called scientific principles and could not explain them.

However, they are senior farmers and qualified craftsmen, and compared with Zhao Si, a modern man who has basically never farmed, they keenly capture the advantages of Quyuan plow.

"This plow is very good! This plow is very good! ”

Several craftsmen gathered in front of the curved plough, carefully observing the difference between the plough and the straight plow, and at the same time opened their mouths to praise.

"What's so good? It seems that the speed is not as good as the straight plow? The king left his mouth and asked.

"General, this plow is small, and it only makes one person and one ox, so it is naturally not as good as two oxen to carry a straight plow. Fang has just plowed, the depth of the plough marks on the ground is the same, a bull negative plow, the speed is naturally not as good as the two ox negative plow, the soil is not deep enough because the plow is too small, if it is larger, the soil must be deeper and faster than the straight plow. ”

The warsmith opened his mouth to explain, and Zhao Si suddenly became enlightened.

The Quyuan plough made this time was only half the size of the straight plow, because Zhao Si followed the memory in his mind.

Times and times are not the same.

During the Qin Dynasty, even the straight plough was a luxury, and ordinary people were still using the traditional farming mode of the plow.

After the Han Dynasty, the long straight plough gradually became popular.

It was not until the beginning of the Tang Dynasty that the long curved plough was really launched.

At this point, the long straight plough was completely eliminated.

In the case of the same size, the performance of the curved plough completely crushes the straight plow, which is completely a structural and mechanical progress.

The small and portable Quyuan plough painted by Zhao Si was only widely popularized during the Song Dynasty.

The popularization of the short curved plough is largely due to the increasing development of the southern region.

The long curved plough is more suitable for large-scale cultivation, and the tillage efficiency of the large plough is better than that of the small plough under the condition of large area and uncomplicated terrain.

The southern region, which is generally small in area and complex in topography, is more suitable for the use of short curved plows.

Later, even in the Ming and Qing dynasties, the population further increased, the grain production center passed from north to south, the per capita land continued to decrease, and the average number of acres of cultivated land per capita became the norm, and the small and fine short curved plough was more in line with social requirements.

However, the long-curved plough has never disappeared, because in essence, everyone is a zigzag plow, and there is no real innovation in the difference in size, but most of the people who use the long-curved plough are the landlord and gentry class, not the poor peasant class.

And during the Qin Dynasty.

Most of the fields granted by a homesteader farmer are about 100 acres, and the yield center is also concentrated in the Central Plains, which is a stable terrain and an area with uncomplicated landforms, so the long curved plough is more suitable for popularization and use than the short curved plow.

There was a military craftsman to solve the puzzle, Zhao Si didn't have to use his brain to think, Wang Li ordered to make another long curved plow on the spot.

It's time for lunch.

It's a pity that Zhao Siren is in the barracks, and the food ration is two meals a day, so he is not very hungry, but he always feels a little uncomfortable when he doesn't eat something at noon.

Taking advantage of the gap, Wang Li and Zhao Si continued to chat.

Zhao Si was happy to make friends with each other, and thanks to Zhao Si's golden finger, Wang Li and Zhao Si's conversation experience was also very pleasant.

Zhao Si saw that the chatter was almost there, and he also asked for the other party's name.

"My name is Wang Li." The king left his mouth and said.

Zhao Si was stunned for a moment, always felt that this name was a little familiar, thinking about the name of the king during the Qin Dynasty, and suddenly remembered Wang Qian, one of the four famous generals of the Warring States.

Zhao Si remembered it all of a sudden.

This is not Wang Qian's grandson, thanks to the fact that he has read several historical novels in his previous life, Zhao Si still has a little impression of Wang Li.

In fact, Zhao Si's history is very poor, and the channels for learning about history are limited to novel websites except for compulsory education.

"But the ...... of Che Hou," Zhao Si asked.

"It's the Great Father!" Wang Li seems to have been accustomed to other people's inquiries like this, and he is familiar with the introduction.

"Disrespectful, disrespectful!" Zhao Si gave up.

He doesn't know much about Wang Li, but he has only read it in novels, and most of these goods appear in the background board in novels......

I don't have a lot of deeds in my impression, as if he took over the Longxi army after the chaos in the world? In the end, he was defeated and disappeared.

Compared with the grandfathers of the four famous generals of the Warring States Period, and Wang Ben, who has made many meritorious contributions, Wang Li can be said to be a typical representative of the tiger father and dog.

If it weren't for the fact that Wang Li had a god of war grandfather, Zhao Si really didn't know each other.

Wang Li just waved his hand in the face of Zhao Si's admiration: "Don't talk about this, didn't you say that there are mermaids in the sea?" ”

Zhao Si smiled and continued to tell the story of the mermaid, without inquiring too much into the other party's family or being subservient.

His astonishment at Wang Li was more of a shock to the historical figures.

Suddenly spanning 2,000 years, the characters who were once in books are in the same time and space as themselves, which is really exciting.