Under the leadership of Zhao Dan, the people of Zhao Kingdom, who were both curious and puzzled, soon came to the back of that hillside.

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

Stinking.

It stinks.

Looking at Zhao Dan, who was walking in the front with great interest, Xiangbang Zhao Sheng slowed down, came to Zhao Bao's side with a bitter face, and whispered to Zhao Bao: "Pingyang Jun, what kind of smell does you smell here?" How do I feel - it seems to smell like feces? ”

Zhao Bao frowned, and replied in a low voice: "I also think it's the smell of feces, and this feces seems to have been left for a few days—"

The faces of both of them were blue and white, and they were a little ugly.

What made the ministers even more unbearable was that the closer they got to this hillside, the stronger the stench became.

However, those old farmers have long been accustomed to this kind of smell, and their faces are more curious, and they don't know why they smell such a strong smell in this royal garden.

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

On the other side of the hill there was a big pit dug from which a very strong stench emanated.

Zhao Dan pointed to the big pit and said to the people in front of him: "Everyone, this is what the widow wants to say to you - manure!" ”

Manure, as the name suggests, is the use of human and animal feces and other excrements to make fertilizer.

Fertilizer is undoubtedly important for the cultivation of farmland.

Generally speaking, the soil that can be cultivated is fertile in the soil, and crops cannot be grown on the land without fertility.

But as a rule, this fertility in the land begins to wane after a few years or even a year or two of cultivation, even in the so-called Ueda.

In the "Book of Rites", it was said: "If the soil is poor, the grass and trees will not grow, and if the qi is weak, the creatures will not fail." That's the way it is.

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

Reduced production means starvation, and even starvation.

Therefore, in order to preserve the fertility of the land, farmers can only use extremely simple and primitive methods such as fallow and rotational tillage, or plant two crops in three years, or plant one crop of wheat chestnuts and one season of beans.

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

For example, the "Book of Supplementing Agriculture" once said: "The dung of people and animals and the ash of the stove are useless." As soon as it enters the field, it will be turned into cloth and corn corn. ”

There is also a good saying: "A crop is a flower, and it all depends on dung".

So manure is still very important.

Compared with the ministers of Zhao who were standing far away, the old peasants' performance was obviously much calmer, not only did they not have any disgusting feelings, but they came to the side of the big pit one by one to observe it carefully.

An old farmer said to Zhao Dan after reading it: "King, I already know about this manure and fertile land. But I don't know why the king digs a pit and releases dung? And in the midst of all this excrement, it seems that there are other things mixed in? ”

Zhao Dan said with a smile: "Although you know that this manure can fertilize the land, what the widow wants to tell you is that you only know one and don't know the other." ”

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

In order to apply manure to the field, the premise is that the manure must be decomposed, which is called manure.

Dig a big pit like this, and then put human and animal feces in it, add plant ashes, animal bones that are usually eaten at home and put them in ashes, and straw crushing, and then pour the urine in the urine bucket into it, and then cover it and ferment, this is a super primitive version of the biogas digester.

Although the fermentation time of this method is a bit long, the organic matter in the fertilizer is consumed relatively little, the residue fertilizer and biogas slurry have high fertility, and the biogas slurry can also be used as an insecticide, which is simply a lot of money.

Zhao Dan said this, looking at the group of stunned guys in front of him and laughing: "What do you think, how about the widow's method of dung?" ”

"Gross!" But Yu Xin finally couldn't hold back and ran to the side and vomited......

"Gross!" Zhao Bao couldn't hold back either, and ran to be with Yu Xin......

Zhao Dan couldn't help but roll his eyes, and secretly complained in his heart: "What a pampered guy who is not diligent in his limbs and does not distinguish between grains!" ”

However, Zhao Dan quickly left this place with everyone and asked people to cover the big pit.

It does smell a bit smoky......

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

The reason why Zhao Dan made this manure is, of course, also because of his previous experience as a village official, and secondly, it is mainly to match the Quyuan plow.

As long as the Quyuan plough is popularized on a large scale in the Zhao Kingdom, the efficiency of cultivated land will definitely increase dramatically, and then how to maintain the fertility of cultivated land will become a big problem.

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

The two things of the plough and the manure are said to be a complementary relationship.

As long as these two things are used well, then Zhao Dan feels that there should be no problem at all if Zhao becomes the first agricultural country among the Warring States within ten years, no, five years.

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

More food means more population, which can feed more troops, and at the same time, it can also improve the lives of the people, increase the people's love for Zhao Dan as the monarch, and virtually enhance the number and morale of the army......

There are so many benefits and so many uses.

Who said farming has nothing to do with hegemony? !

Zhao Dan's explanation and prospect were depicted, and the ministers of Zhao State present were all moved.

"Gross!" Yu Xin, who had just come back from vomiting, heard Zhao Dan mention the word manure, and actually vomited again......

Zhao Dan couldn't help but roll his eyes heavily.

In order to alleviate this inexplicable embarrassing atmosphere, Zhao Sheng opened his mouth and asked: "The manure that the king said really has such an effect, can increase the yield per mu by more than half a stone?" ”

The others, especially the old farmers, all looked at Zhao Dan very eagerly, looking forward to Zhao Dan's answer.

Zhao Dan laughed and said categorically: "It's definitely better!" ”

What are you kidding, the effect of this manure, Zhao Dan personally verified it back then.

Not to mention half a stone, as long as the fertilizer is sufficient, it is not a problem to multiply it several times or even more.

If he could have some portable space and get some hybrid rice and fertilizer from later generations to come to this world, Zhao Dan felt that he might be invincible just farming......

"That's right." Zhao Dan turned to a few old farmers and smiled: "Today I have worked hard for a few old men, the widow has ordered someone to make a few Quyuan plows, although the old men will use them after they go back, if they use it well, remember to publicize it to others, and tell them that the widow will soon make the Quyuan plow on a large scale!" Also, this manure method, even if you can try it when you go back, it will definitely work! ”

Looking at the old farmers who went away after thanking him for a thousand thanks, Zhao Dan's heart was also quite proud.

Who says a widow can't farm?

This is called three years without planting, a kind of amazing!

After Zhao Dan finished, he waved his sleeves: "Go back to the palace and take a bath!" ”