"Well, are you doing fertility?"

The indescribable smell made Zhao Xu unable to help pinch his nose.

Zhu Tuo was now thinking that he was still urinating in the clay pot on the stove, and couldn't help but smile.

After King Yan went to Feihu Pass, the students were just memorizing the things on the textbooks in a regular manner.

But with their backs on their backs, they found that there were a lot of interesting things in this book, and it seemed that they could do it by themselves.

So they reclaimed a piece of land in the college.

Then loosen the soil and sow seeds as mentioned in the textbook.

Then the two days came when it was time to apply fertilizer, and they remembered a kind of soil fertilizer in the textbooks.

According to the textbook, this fertilizer can increase the yield per mu.

The method of making it is to heat 50 kilograms of human urine to 20%, steam and cook until 10%, stir 2 kilograms of cooked gypsum, dry and crush it, which is called urea gypsum.

When applying fertilizer, you only need to apply ten kilograms of base fertilizer per mu, and five kilograms of top dressing in the later stage.

"Yes, Your Highness, I want to try it. If this kind of soil and fertilizer can increase the yield per mu, it will be a blessing to the people of Yan King." Zhu Tuo said.

The current farmland in Dasong is only about two stones per mu.

According to the new weights and measures set by the King of Yan, it is about 240 kilograms.

As long as this soil and fertilizer can increase the yield by 120 kilograms, it is equivalent to one-third of the increase in the land in Yanzhou.

Zhao Xu nodded, many well-known.

The high yield of contemporary agriculture depends on two important factors.

The first is fertilizer, and the second is high-yield seeds.

He can't cultivate this high-yield seed at present.

Fertilizers are also not as high-end as contemporary ones.

However, he can still do some soil and fertilizer that can replace chemical fertilizers.

That's why he compiled this urea gypsum into the textbook.

This thing is an alternative that experts came up with in the early days of the founding of the People's Republic of China, without industrial fertilizers.

Among many chemical fertilizers, nitrogen fertilizer is the main fertilizer that promotes increased production, such as urea.

This urea gypsum is naturally equivalent to a simple urea fertilizer.

However, Zhu Tuo and the others obviously used the wrong materials.

The gypsum is not lime, so he said: "The idea is good, but if you get the wrong material, this gypsum is not lime."

After saying this, all the officials were stunned.

Zhu Tuo's old face turned red, and he said, "Everyone has the word "stone", but the lower officials thought it was the same thing."

Zhao Xu smiled and shook his head. The gypsum was calcium sulfate, while the ripe lime was calcium hydroxide.

However, now he explains to the officials, but it is not understandable.

So he said, "You put this thing on first. After a while, I will find plaster for you."

Gypsum has a lot of reserves.

In contemporary Xingtai, Hebei, there is a large mine of 700 million tons.

Its corresponding location is Dai County in Yanzhou, which is the place where white sand is produced.

However, this mine also needs to be searched and mined.

"Yes, Your Highness." Zhu Tuo and other students were in a complicated mood.

They were smoked by the smell of urine for a whole morning.

When asked the students to leave urea gypsum for the time being, he also randomly selected some of the contents of the students to recite the textbooks.

Then he said to Zhu Tuo: "It is better to have no books than to believe in books. The government office should also consider sending these students to the countryside and using their teaching materials to teach the people how to carry out reasonable farming, animal husbandry, and participate in hydraulic irrigation projects. Simply put, it is practice."

"Your Highness is very much talking about this matter. The officials will talk to Liu Wangfu to give these students the opportunity to participate in government affairs." Zhu Tuo said.

The students were all excited when they heard this.

Always staying in school, they are bored enough.

And they learned something new, and they also wanted to take the opportunity to use it.

After staying in the Government Affairs School for a while, Zhao Xu returned to the royal palace.

Before leaving, he asked Zhu Tuo to call Liu Fu over when he went back.

He won't go to the Military Academy. Now that the war has just been fought, Chang Wei and his friends are probably doing a lot of business.

As soon as he arrived at the palace, Zhao Xu sat down in the study, and Liu Fu came over.

"Your Highness." After entering the study, Liu Fu bowed.

Zhao Xu looked at Liu Fu and said in a deep thought: "I want you to set up a new institution called Mining Xunshuoshi."

The word "Mining Search Office?" is easy to understand. Liu Fu said: "Your Highness, there seems to be no need to set up a special government office for this mineral exploration. After all, this is another expense."

Zhao Xu glanced at him, "What have you learned in the government school? This farming is the foundation of the world, but this mine is the foundation of industry and commerce. There is a huge amount of wealth buried in the land under your feet, which is not comparable to a little expense."

Liu Fu was also very aggrieved, "Your Highness, it's not that your highness doesn't understand, but that all the mines that can be found in Yanzhou have been found, and they are now recorded in the government office."

"I tell you that the record is only a very small part of the time. What I want is to find out what I can find." Zhao Xu said, "Stop talking nonsense. The officials of the Mining Search Department will take the exam and select the outstanding students in the school. After that, I will tell them something separately."

"Yes, Your Highness." Liu Fu replied.

He was a little surprised. How did King Yan know that there were so many mines underground in Yanzhou?

This thought flashed through his mind.

In the end, he decided not to think about it. After all, there was only one sentence, and the King of Yan was really unfathomable.

Waving his hand, Zhao Xu asked Liu Fu to go back.

After the war is over, we should calm down and develop.

After all, the economic foundation determines the superstructure.

If you don’t have two steamed buns in your arms, how can you walk for three days and three nights?

Thinking of this, he was trying hard to search in his mind.

On paper, all the minerals in contemporary Hebei, that is, Yanzhou, are listed.

Moreover, based on comparing contemporary landscape information with Yanzhou landscape information, a mineral distribution map is drawn.

After all, although history has changed, some geographical indications have existed since ancient times and cannot disappear or appear out of thin air.

Relying on these geographical indications, it is easier to find the location of these minerals.

After these mines are found, he can use whatever he needs.

Of course, in addition to the location of the mine, he also had to prepare a separate textbook.

This textbook contains the appearance of various ores.

To facilitate mine seekers to find mines.

The textbooks will be handed over to the people from the Mining Search Department, which is what he told Liu Fu, and he should teach these students specifically.

The next few days.

While he went to the school to explain what they were wondering about, he also drew a map of Yanzhou minerals in his study.

Day 6.

A team of imperial guards from the capital arrived at the royal palace.

Another eunuch named Xiao Haizi came with him, who brought Zhao Heng's imperial edict.

After receiving the order, Zhao Xu ordered Feng'er to prepare some gifts for the group.

However, it was rejected by the little eunuch who came.

According to the little eunuch, Tong San's incident was investigated tightly in the palace, so they did not dare to do anything randomly.

After handing over the imperial edict, they set out to return.
Chapter completed!