Under Zhao Dan's leadership, the people of Zhao, who were both curious and puzzled, soon arrived behind the hillside.

As they walked, several ministers of Zhao State began to frown involuntarily.

Smelly.

It's really too smelly.

Looking at Zhao Dan, who was walking in front with great enthusiasm, Xiangbang Zhao Sheng slowed down, approached Zhao Bao with a bitter face, and whispered to Zhao Bao: "Mr. Pingyang, do you smell what stench it is? Why do I feel that it seems to be the smell of feces?"

Zhao Bao frowned and replied in a low voice: "I also think it smells of feces, and the feces seem to have been left for several days."

Both of them had blue and white faces, which was a bit ugly.

What these ministers couldn't stand was that the closer they got to this hillside, the more intense the smell was.

However, the old farmers have long been used to this smell, and their faces are more curious, and they don’t know why they smell such a strong stench in this Wang Family Garden.

After everyone turned the hillside and saw the scene in front of them, they finally understood.

There was a big hole dug on the other side of the hillside, and the very strong odor was emitted from it.

Zhao Dan pointed to the pit and said to the people in front of him: "Everyone, what I want to talk to you is this manure!"

Manure, as the name suggests, is to use excrement such as human and animal feces to make fertilizer.

Fertilizer is definitely unquestionably important for farming.

Generally speaking, the soil that can be cultivated is full of fertility, and the land without fertility cannot grow crops.

But generally speaking, this fertility in the land will begin to decline after a few years or even one or two years of cultivation, even the so-called Ueda is no exception.

The Book of Rites once said: "If the soil is worn out, the grass and trees will not grow, and if the energy is weak, the organisms will not go well." This is what we mean.

The direct consequence of the decline in soil fertility is of course the reduction in crop yields and the decline in crop harvests, which is obviously unacceptable to farmers.

Reducing production means being hungry, and it may even starve to death.

Therefore, in order to preserve the fertility of the land, farmers can only use extremely simple and primitive methods such as fallow and rotary tillage, either two seasons of three years, or plant one season of wheat chestnut and another season of beans.

Of course, this is a more passive countermeasure. The ancestors of China have not taken countermeasures, and they all know that fertilizing the land can maintain fertility.

For example, the Book of Buyuan once said: "The manure of humans and animals, the grey and mud of stoves, is useless. Once it enters the field, it will be transformed into cloth, silk, beans and millet."

There is another saying that goes, "A crop is a flower that depends entirely on manure."

So manure is still very important.

Compared with the ministers of Zhao who stood far away, the old farmers were obviously much calmer. Not only did they not feel disgusting, but they went to the pit to observe carefully.

After reading it, an old farmer said to Zhao Dan: "Master, this manure is so rich, and I have known about it for a long time. But I don't know why the king wants to dig a hole to put manure? Moreover, there seems to be other things mixed in these manures?"

Zhao Dan smiled and said, "Although you know that this manure can make the land rich, what I want to tell you is that you only know one but not the other."

You should know that although this manure can be used as fertilizer, if fresh manure is applied to the field, it will not only fail to play a role, but will also burn seedlings.

If you want to apply manure to the field, the prerequisite is that the feces must be decomposed, which is the so-called manure repellent.

Dig a big hole like this, then put the feces of humans and animals into ferment, plus the ash of plants and wood, the leftover animal bones at home are burned into ashes and put into it, and the straw is broken. Usually, the urine in the urine bucket is poured in, and then covered and fermented. This is a super original version of the biogas tank.

Although this method fermentes a little longer, the organic matter in the fertilizer is consumed relatively little, and both slag fertilizer and sludge liquid have high fertility. Moreover, sludge liquid can also be used as insecticides, which is simply a killing of multiple goals.

Zhao Dan said here, looking at the group of guys in front of him who were stunned and laughed: "You all think, what's the way to ferment manure?"

"Vomit!" But Yu Xin finally couldn't help it and ran to the side and vomited...

"Hait!" Zhao Bao couldn't help but run to accompany Yu Xin...

Zhao Dan couldn't help rolling his eyes and complained in his heart: "What a spoiled guy who doesn't have any diligence in all limbs and grains!"

However, no matter how much he complained, Zhao Dan quickly took everyone away from the place and asked someone to cover the pit.

This taste is indeed a bit striking...

After all, this big pit has only been done for a few days, and it is still a long time before the fermentation is completed.

The reason why Zhao Dan made this manure was, of course, because of his previous experience as a village official, and the second was mainly to match the Quyuan Plough.

As long as the Quyuan Plough is promoted on a large scale in Zhao State, the efficiency of arable land will definitely be greatly improved, so how to maintain the fertility of arable land will become a big problem.

The emergence and promotion of manure can solve this problem to a certain extent.

The two things, the curved plow and manure, are a complementary relationship.

As long as these two things are used well, Zhao Dan feels that Zhao State will become the number one agricultural power among the heroes of the Warring States Period within ten years, no, within five years, and there should be no problem at all.

Sufficient food is of great significance to Zhao State and even any country today.

More food means more people, and more troops can be supported. At the same time, it can improve people's lives and increase people's love for Zhao Dan, the king, which invisibly enhances the number and morale of the army. Zhao Dan can even use food to do some diplomatic work, such as changing food to equipment or changing food to support, etc.

There are many benefits and many uses.

Who said farming has nothing to do with fighting for hegemony? Nonsense!

After Zhao Dan's explanation and prospects were drawn, the ministers of Zhao State present were all moved.

"Vomit!" Yu Xin, who had just returned from vomiting, actually vomited again when he heard Zhao Dan mention the word "dust"...

Zhao Dan couldn't help rolling his eyes heavily.

In order to alleviate the inexplicable embarrassment, Zhao Sheng asked: "What the manure mentioned by the king really has such effect, can it increase the yield per mu by more than half a stone?"

Others, especially several old farmers, looked at Zhao Dan very eagerly, looking forward to Zhao Dan's answer.

Zhao Dan laughed and said firmly: "It's definitely even better!"

What a joke, Zhao Dan personally verified the effect of this manure back then.

Not to mention half a stone, as long as there is enough fertilizer, it will not be a problem to double or even more.

If you could have some space to get some hybrid rice and fertilizers from later generations to come to this world, Zhao Dan felt that he might be invincible even if he farmed alone...

"By the way." Zhao Dan turned around and smiled at the old farmers: "Today, I have worked hard. I have ordered people to make several curved plows. I will use them after my father-in-law returns. If it is used well, remember to publicize them to others and tell them that I will soon make the curved plows on a large scale! Also, this method of manure can be tried when you go back, and it will definitely work!"

Looking at the old farmers who left after thanking each other for their gratitude, Zhao Dan was also quite proud.

Who said I can’t farm?

This is called not planting for three years, an amazing thing!

After Zhao Dan finished his exclamation, he waved his sleeves: "Go back to the palace and take a shower!"
Chapter completed!