Hanjiazhuang, farmland outside the village.

Lao Hu kept thanking the young master for his kindness, but he was stupid, and he always said those few words, Li Zexuan was very embarrassed to hear it on the side, and Han Lizheng interrupted him when he saw this: "Lao Hu, you have been waiting here for so long, haven't you waited for the ploughing cow?" ”

Hearing this, Lao Hu shook his head dejectedly, pointed to a middle-aged man who was plowing the land not far in front of him and said, "Lizheng, look, Lao Wang's family hasn't run out yet." This year, there is little rain, and this field is difficult to plow, which is sad to death. ”

"Uncle Han, can't you go to the county to borrow more farming cattle?"

Li Zexuan listened to Lao Hu's complaints, and had some doubts in his heart, so he asked.

Han Li shook his head in embarrassment: "Young master, do you know, we have a lot of people in Zhuangzi, and the county has allocated more ploughing cattle than other Zhuangzi, at this time, all places are ploughing in spring, and there must be no extra ploughing cattle in the county to give to us." ”

Lao Hu also sighed heavily at this time: "Alas, Li Zheng, according to the current speed of ploughing, I estimate that many farmers in our Zhuangzi are afraid that they will miss the spring ploughing period, how can this be done?" ”

Li Zexuan was also shocked when he heard this, he was also a rural child in his previous life, and he knew how serious the consequences of missing the spring ploughing period were, and it was estimated that many families would starve at that time, not to mention that everyone missed the spring ploughing, which would definitely affect their enthusiasm for raising chickens, and this problem must be solved.

He pondered for a long time, looked at Lao Hu next to him, and asked, "Uncle Hu, how much land can a cow plough in a day now?" ”

Lao Hu scratched his head, thought for a while and said: "Young master, it is difficult to plow this year, a cow can plough up to four acres of land a day, if you plow more, I am afraid that the cattle will be tired, and the gains will outweigh the losses." In previous years, six or seven acres of land could be cultivated in a day. Alas, it's all because there was too little rain this year. ”

It's only four acres of land a day, this speed is too slow, Li Zexuan frowned, looked at Han Lizheng, and asked, "Uncle Han, how many ploughing cattle are there in Zhuangzi now?" ”

"Young master, this year Zhuangzi has rented twenty ploughing oxen, which is already a lot more than other Zhuangzi."

Li Zexuan silently summed up in his heart, at this rate, wouldn't it take more than a month to plow? That's not going to work. It's not that he didn't want to spend money to buy farming cattle in other places, but in this era, farming cattle have always been very nervous, and he bought farming cattle from other places, what should the people in that place do? It would be nice if I was like other protagonists who crossed over, and I would like to bring a system with me, and I would directly exchange a farming tractor to ensure that I could plow dozens of acres of land a day.

Alas, since there are no tractors and it is difficult to increase the number of ploughing cattle, it seems that now we have to think of other ways to improve the efficiency of the current ploughing. This problem is easy to solve, and with countless advanced mechanical models in his mind, he is sure to find many ploughs that are even better than they are today.

"Uncle Han, I'll go and see what kind of plough the farmers use."

Li Zexuan explained, and walked to Lao Wang, who was old and pointed at before. Han Lizheng and Lao Hu also hurriedly followed.

Li Zexuan came to the ridge next to Lao Wang, and his eyes began to focus on the plough used by Lao Wang. Lao Wang was concentrating on plowing the land, and he didn't notice that someone was watching him next to him.

Li Zexuan was highly short-sighted in his previous life, and in this life, he didn't know if it was because of his divine skills, but his eyesight was excellent, and he could see the structure of the plough clearly from a distance. He found that the structure of the plough was really strange, the plough wheel was straight, and the length reached about nine feet, such a long plough wheel, it is estimated that it is very difficult to turn around.

Li Zexuan quickly constructed the three-dimensional structure of the plough in front of him in his mind, and according to the knowledge of engineering mechanics he had learned before, he analyzed the force of each part of the plow, and found that the plough really needed to exert a lot of tension to plough the ground, and the structure was obviously unreasonable.

Li Zexuan frowned, he was thinking about which better plow should be used to replace the current plow. The plough of various different ages flashed in my mind, and suddenly stopped at a plow that was not particularly different from the current plow.

"That's you!"

"This should be called Quyuan Plough, it shouldn't have appeared yet. The structure of this curved plough should be improved from the structure of the plough in front of you, although the change is not too big, but the changes in each place are very critical, compared to the plow used by the old king in front of you, this curved plough is obviously more labor-saving, and it is easy to see it by drawing a force analysis diagram. ”

At this time, Li Zexuan not only had a three-dimensional model of the Quyuan plough in his mind, but also its force analysis diagram, and it was obvious that the Quyuan plough was more labor-saving, and it was not a little bit saved. Crucially, the plough is not difficult to manufacture and is easy to manufacture in large quantities. When he goes back, he can find a craftsman to start manufacturing immediately, so as to ensure that the farmers of Hanjiazhuang will not miss the spring ploughing.

In fact, the Tang Dynasty currently uses the long straight plough handed down from the Han Dynasty, and the Quyuan plough conceived in Li Zexuan's mind only began to appear in the Jiangdong region in the late Tang Dynasty, so it is also called the Jiangdong plow. Compared with the long straight plow, the curved plough is indeed more flexible and labor-saving, and in the case of relatively wet soil, a young man with greater strength can pull it.

"Uncle Han, you plow like this first, I will find a way for you in the next two days, and I will definitely not let the farmers miss the spring ploughing." Li Zexuan had a solution in his heart, so he turned around and said to Han Lizheng.

Han Lizheng and Lao Hu Wenyan were both surprised, the land is the life of the farmers, and if they miss the spring ploughing, the harvest will be greatly reduced, and it is not uncommon for people to starve to death. I didn't expect the young master to help them find a way, which was really surprising.

"Thank you young master, all the farmers in our Hanjiazhuang will remember the great kindness of the young master for the rest of their lives. It's just that I don't know what method the young master plans to use? Is it to go to Chang'an and buy farming cattle again? Han Lizheng bowed very seriously and thanked him, but he was also very curious about what method Li Zexuan would use to help them, if he bought a ploughing ox for their Zhuangzi, the price he paid would be too expensive.

Li Zexuan shook his head and said with a smile: "Of course I didn't go to buy ploughing cattle, I bought ploughing cattle, what do farmers in other places use?" Uncle Han, in two days, I will bring you a more labor-saving plough, and your ploughing speed will be at least twice as fast at that time! ”

Han Lizheng and Lao Hu Wenyan were both surprised, is there such a plow in the world?

Lao Hu's eyes widened exaggeratedly, and he shouted in disbelief: "Less... Young master, you... Are you telling the truth? How can there be such a divine plough in this world? ”

Li Zexuan nodded with certainty and said, "Uncle Hu, don't worry, seeing is believing, and you will naturally see you in two days!" ”

……