The third update is here, please give me a monthly ticket!

In ancient times, there was no fertilizer. After three or five years of cultivation, the fertility decreased and the crop harvest would decline. Therefore, people often had to use simple methods such as fallow and rotation to restore the land to fertility. They either plant three or two seasons, or plant wheat millet one season after another.

"If the soil is worn out, the plants and trees will not grow, and if the energy is weak, the organisms will not go away. If you plant the fields for three or five years, the strength will be insufficient."

The use of fallow farming to restore fertility is too simple and backward, which greatly affects the harvest. Therefore, the people have long discovered that fertilization is applied to maintain the fertility of the land. Some people have long summarized that the manure of humans and animals and the mud of stoves and feet are useless. Once they enter the field, they will be transformed into cloth, silk, beans, and millet.

However, the Tang people's use of human and animal manure was too simple, and generally only had the simplest way to ferment manure. Although such ferment manure can also have fertility, the conversion rate is still too low.

For example, if there are both a pile of pig manure, the management will be effective if it is done properly. If it is not done properly, the effectiveness will be less, or even nothing.

Manure cannot be applied directly, otherwise it will sometimes harm the crops and easily burn seedlings. Tang people compost manure is to make the manure rot and prevent the seedlings from burning roots.

"Brother-in-law, what do you think if someone comes to help you clean the toilet for free regularly?"

After hearing this, my father-in-law stopped his movements.

"If there is such a thing, of course it will be fine. But who would come to help clean the toilet for free? This toilet is smelly and dirty. If you want feces, it is not more convenient to buy directly at the feces yard, and it is not expensive, and it is much cheaper than doing it yourself."

It is hard for my father-in-law to imagine that someone would come so kindly to help clean the toilet. After all, if you have this skill, you can buy it directly outside the city and it will not cost much money.

Zhang Chao already knew that the manure farm outside the city was just a side job of the official workers who were responsible for cleaning up the feces in the toilets in Chang'an. They took the manure out of Chang'an, built some septic tanks, and simply piled the manure in the pond. Then they sold it to the nearby people who grew vegetables and farmed, and there was no processing at all.

Such manure can greatly reduce utilization. Except for the nearby vegetable farmers, it is difficult for ordinary people to use. For example, the people in Zhangjiagou on the Bashang also need manure, but they are thirty miles away from Chang'an. The unprocessed manure has to be transported by car. However, it cannot be transported by two ducts per truck, and the transportation capacity is high, so it cannot be transported much in a day.

Especially in Bashang, there is no ship to pass.

If Zhang Chao collected manure from Chang'an, then processing it into dried manure will undoubtedly be much more convenient to transport. In particular, he knew that after manure processing, it is not just as simple as convenient transportation. The processed manure can be applied directly to the field, and the effectiveness is several times that of unprocessed. Such dry manure can not only be used as base fertilizer, but also additional fertilizer can be added at different periods of crop growth to help crop growth. This is very different.

During the Ming and Qing Dynasties, the yield of fields in Jiangnan was extremely high. In addition to the abundant rainfall and fertile fields, it was inseparable from the use of developed manure in Jiangnan. Various high-quality manures allowed the fields to maintain fertility and even increased the yield by several cents.

Zhang Chao had seen his grandmother's house in the countryside before fermenting manure and ripe manure. Although there were fertilizers at that time, the country people would still make full use of manure.

There is also a place for combing manure in my village. I take out the manure from the toilet regularly and get it into a special cesspool. A lot of things have to be added to ferment. After the fermentation is done, take it out.

First lay a layer of furnace ash or wood ash on that empty field, then spread the half-thick and not-so-frigid fermented and fermented cooked manure on top, and spread it into a round manure cake with a diameter of more than one meter six or seven centimeters.

When it is dry until it is almost dry, use a hoe to chop it into pieces and make it dry with pointed feces at both ends.

This manure cake can not only be added with wood ash, but also with animal bones burned ashes, bean cakes, and even some wheat straw stalks are chopped and added to it. The effect is even better.

Zhang Chao also knew one way, which was to dig a large pond, throw the straw of the manure, the cattle and horse ring washer into a cesspool, add urine, water, etc., and then cover it for fermentation. This is similar to fermentation of a biogas tank. Although the fermentation is slow, the organic matter is consumed less, and the slag fertilizer and sludge liquid have high fertility, especially the sludge liquid can even be used as an insecticide.

This method is an excellent manure processing method, which can make manure conversion more efficient.

If there is enough manure, Zhang Chao dares to say that it can double the yield per mu.

People in later generations may look disgusted when talking about manure, but in the past, it was a treasure in the hearts of farmers. Although the Tang people didn’t know how to use it, farmers also had good things in the eyes of them.

As long as Zhang Chao has a way to strengthen manure and make manure more convenient for transportation, he believes that this will definitely be very popular and become an excellent project.

In history, a Tang Dynasty man cleared man in Chang'an City and became a figure on the Tang Dynasty's richest man list.

Zhang Chao likes to make money and never hides it.

Now that there is such a good project, which can make money and have such a good prospect, Zhang Chao is of course tempted.

The old man who weaves willow baskets smiled and said to Zhang Chao, "If someone really doesn't want money to help me clean the toilet, then I will definitely give it to him."

Zhang Chao wondered whether this transaction would have conflicts of interest with others. "Brother, do you think if someone comes to collect manure for free, then those who are responsible for collecting manure will be willing?"

"I'm willing, why don't you? Those people are all because of the orders of the government. Otherwise, they would not be willing to do this chore. It's bitter and dirty, and there is no way. Although they can sell the manure to the suburbs of the city to grow vegetables, they can't sell it for a few dollars."

Zhang Chao nodded.

The people who clean the manure in Chang'an are not considered to be their own. Their actual identities should be equivalent to those of sanitation workers in Chang'an.

Zhang Chao thought this was a good thing, at least there was no private manure farm owner, so that he would not compete for territory and manure. In fact, he had also considered that if he really had a private manure farm, he would have to spend money to rent some land from them, or buy manure directly from them, and then process it himself.

But now it seems that you can go directly to the city to collect manure, which can save a lot of costs.

Or you can consult with the relevant yamen and contract the business of manure extraction directly. Maybe you can get a few melons and two dates from the yamen. After all, if someone contracts these, the yamen will save you trouble and trouble.

It is actually not difficult to build a manure factory, the most important thing is that someone needs to be in charge.

There are so many families in Chang'an and those public toilets that have to be cleaned and collected regularly, and at least a few hundred people are required. However, as long as Zhang Chao pays people a salary and conditions are acceptable, some people are willing to come. They don't even need any young and strong children. Recruiting some people in the countryside who are fifties or under the age of twenty can do this.

Give them a mandatory truck, get a few dung buckets, and a spoon of dung, and they will be alive.

Fertilizer is a good thing. Judging from the farming in later generations, no one in the family relies on fertilizers, and they have to invest 20 to 30% of the harvest in a year to buy fertilizers. Although the investment is very high, the fertilizer has indeed increased a lot.

It is probably difficult to make bean cakes. Nowadays, the yield of beans is not as good as that of the Ming and Qing Dynasties. In fact, bean cakes are mainly used as livestock feed, and even people can eat them. I guess there are not many people willing to use them to grow fertilizers and farm.

But there are many things like wood ash, straw, etc. in the countryside, and they are cheap, so they almost cost much. It is very good to use this to process dry manure cakes.

In addition, Zhang Chao felt that he could make several fermented steam pools to ferment and fertilizer. He did not need biogas to cook and generate electricity. Therefore, the requirements for mercapto tanks are not that high. Just make an ordinary fermentation tank. Biogas is completely unnecessary, just mercapto slag and liquid. Although this is a bit of a bead for buying a box, mercapto fertilizer is also a top-notch fertilizer.

Zhang Chao was very excited when he thought about it.

If I package all the manure in Chang'an City in the future, wouldn't I become a generation of manure king?

The dirt is heavier than the Wanhuhou.

Don’t underestimate the manure collectors, just like the waste factories in later generations, they all make a lot of money.

Moreover, Zhang Chao felt that in the future, the fields at home, the yield of these high-efficiency manures would increase greatly.

When Zhang Chao thought that he would contract the entire Chang'an manure in the future, he was a little excited. At that time, thousands of manure deductors in Chang'an City were all his subordinates.

It made him angry and he didn't take out feces for a month, and the entire Chang'an City would be stinking.

Zhang Chao felt that the manure factory could be built on the edge of the Wei River outside the city, so that the shipping function could be fully utilized. Several manure transfer stations could be built outside several city gates outside Chang'an City.

This can completely create an industrial chain, which can divide the labor and cooperate with the division of labor, and a dedicated person is responsible for picking up manure at the door and transporting manure out of the city. Then, each manure transfers to the station, gathers the manure, and then transports it to the processing station by car and ship. A dedicated person is responsible for the fermentation, processing and drying of manure.

Then a dedicated person is responsible for delivering manure, using a boat or a car to deliver the manure directly to the people's homes.

Of course, this is not free. If the people give money, they can deliver manure to their homes. Just like buying fertilizers in later generations in rural areas, salesmen come to the door to sell and register, and then directly send the fertilizer to the doorstep. You don’t need to transport it yourself.

People in the Tang Dynasty were also used to using manure. Although they did not know the deep processing of manure, Zhang Chao did not have to worry about the promotion of manure.

If done well, this is an industry that doesn't look very good on the surface, but will actually be very amazing. Fertilizer is closely related to farmers and farming. As long as Zhang Chao's fertilizer can show good effects, I believe it will be very popular.

By then, Zhang Chao can open a chain manure factory.

As long as there is a city, he can open a manure factory and a franchise factory.

Hahaha, forget it, I think a little too much, but even if I only occupy a single place in Chang'an, it is very impressive. Even if I can only do it exclusively for a few years, I can make a big deal.

"The official has nothing to do?"

When the old man saw Zhang Chao laughing from time to time, he was a little confused. Why did this official like a fool? He borrowed a toilet and refused to leave.

"Thank you, my father-in-law, for borrowing the toilet, and say goodbye." Zhang Chao stood up with a smile and bowed to his father-in-law.

After leaving his father-in-law's house, Zhang Chao walked at the Fangmen, his steps were light and his steps were light.

Damn, I'm a man who is about to become the dung king!
Chapter completed!