The character of the eldest grandson Wuji is still good, although he is more ruthless, but he has never heard of debts owed to others. told Li Xiao about 2,000 yuan, so on the same day, the eldest grandson's housekeeper pulled several carts of money from the opposite Zhuangzi.

There were copper coins and silk silks, and even some gold and silver.

Li Xiao took someone to count it three times very seriously, and after counting it once, he counted it twice again, and after confirming that the number was correct, it was exactly two thousand yuan, and then he opened the receipt with a smile and asked the steward to take it home.

If you want to farm, you have to have fertilizer, and just pick up some cow dung and sheep dung and eggs in the field, which is really not enough. Lijiazhuang is just such a few people, and those toilets can't produce much.

paid to buy it in Taifu Temple, but Li Xiao was even more unwilling.

Do you have to spend money on this thing?

He Li Xiao wants to do something, how can he suffer. The horse manure of Taifu Temple is not only expensive, but also difficult to buy, to buy indicators, to queue, and to owe favors.

Just go to Chang'an to build some toilets, get a few fecal collection teams, and go to various alleys to dig manure from door to door, some people are willing to help people clean the toilet for free, it is estimated that it is too late for everyone to be happy.

This manure is a treasure, transport it back, get a few manure tanks, add mud and ash to make dry manure after fermentation, or directly dilute the manure tank and pull it to water the ground, all of which are good things. In the era when there was no chemical fertilizer, organic fertilizer was king.

With plant ash, it can definitely increase yield.

If you build a biogas tank in the field, throw the manure and some grass roots and leaves into it to ferment and ferment, and you can still get biogas slurry.

Not only is it a good fertilizer, but it can also be used as an insecticide and even as a herbicide.

Why was the grain production high in later generations? Isn't it just that the grain is good, plus the fertilizer is sufficient, and then it is insecticide. The cultivation of those large farms was all mechanized, but in fact it was very extensive in management, similar to the cultivation at this time, relying on chemical fertilizers, seeds, and pesticides to ensure high yields.

There is no medicine, no chemical fertilizer, and you can only rely on organic fertilizer.

Autumn sowing is imminent, the wheat field has just been harvested has begun to plough the field, at this time if the field can be watered with some manure as base fertilizer, it can definitely greatly improve the fertility of the field, promote the germination and survival of seeds and the vigorous growth of young seedlings.

Two thousand yuan can buy more than 300 big cows, which is a lot of money, and even a big mansion can be bought in Chang'an.

With this money, it is not a problem to build some toilets in Chang'an City.

I was writing and drawing in the study, designing the style of the public toilet, and Li Zhi came.

Li Zhi still came in micro-service, with only a dozen followers.

When Li Xiao heard the news, he looked at the dozen or so entourage, and knew that there must be a large army of Praetorian Guards nearby.

"I heard that the wheat yield of San Lang's family is five stone two per mu, which is very good." Li Zhi sat in the hall with a smile and ate watermelon.

"It's really five stones per mu."

"What's the secret here? I heard that your wheat seed is excellent, where did you get the new wheat seed? Li Zhi asked with concern. If it is a problem of wheat seeds, wouldn't it be as auspicious as corn, and if all the wheat fields in Datang are replaced with this kind of wheat, then Datang's grain output will not increase a lot.

Li Zhi came in a micro-suit, so he didn't want Li Xiao to treat him with courtesy.

"Back to Your Majesty, the wheat seed is not a new foreign species, but a carefully selected and cultivated seed in the existing wheat seed, selected and bred, coupled with deep ploughing, water retention and sufficient fertilizer, so there is a yield of five stones per mu, compared with previous years, the yield of this land has increased by about sixty percent."

Originally, the yield per mu of this land was more than three stones, but now it has surged to five stone two, nearly doubled.

"Selected and excellent breeding, deep cultivation, water retention and sufficient fertilizer? It's as simple as that? ”

"Your Majesty, if you can do these nine words, you will definitely be able to increase production a lot."

"It's easy to say, but hard to do. Let's just say that this deep ploughing is not easy, although my Datang has been stable for many years, but not every family has cattle, and many families still rely on people to plow the land. How to talk about deep ploughing, fortunately, you invented the curved plow, which only needs one ox to plow the ground equivalent to two oxen, and the plough is deeper. Even if it's a human back, it's much easier than before. ”

The key to deep ploughing is to have large livestock, cattle, horses, and mules, as well as good farm tools, which is not only a more advanced plough such as a curved plow, but also a sufficient amount of iron.

The plough of the curved plough is also made of iron, and you have to use good iron, otherwise how to plough the soil. But iron has never been a cheap material, this is a national strategic material, and iron has to be given priority to supply the imperial court to make weapons, armor and weapons.

It is no problem to fully promote the curved plow, but it is not easy to get all the curved ploughs to be equipped with iron plowshares. The people can't afford to have money, and the imperial court doesn't have such a large iron output.

Li Zhiyou thought of Quyuan Plough from deep ploughing, Quyuan Plough thought of iron, and then thought of iron ore, thought of iron prison, and thought of the iron prison, the more he thought about it, the farther he went.

Li Xiao looked at it and had to pull it back, otherwise he wouldn't know where to think of it.

"It is not easy to dig iron ore, and it is even more difficult to smelt iron, although it is hard to cut wood and burn charcoal, open a furnace and smelt iron, but there is not much iron smelted in each subway mine in a year." Li Zhi sighed.

Salt and iron have always been monopolized by the imperial court, which is since the Han Dynasty. Although the current dynasty followed the old practice of the Sui Dynasty and imposed a ban on salt, not monopolizing the sale of salt, but allowing the people to produce their own salt and then sell it freely by merchants, it did not relax the ban on iron at all.

Iron is a national strategic material, and the imperial court has set up many mine supervisors in various parts of the world to specialize in mining and smelting iron. It's just that the prospecting and iron smelting technology in this era are insufficient, resulting in a very low production.

Li Xiao thought to himself, if iron can be operated privately, then I have some ways to improve my technology, but now that iron is operated by the state, I don't bother to bother with that brain.

"Your Majesty, in fact, iron smelting doesn't have to be so troublesome as cutting wood and burning charcoal. In fact, there is a kind of natural charcoal in the mountains, which can be burned when dug up, and it is actually much more convenient to use it to smelt iron, which can save a lot of manpower and time for cutting wood and burning charcoal. ”

Although he didn't want to get involved, seeing that Li Zhi was also difficult, he couldn't help but remind him out loud. Anyway, he didn't have this knowledge, and he didn't have the opportunity to smelt iron himself.

"Is there natural coal in the mountains and underground? Can iron be smelted? Li Zhi stared at Li Xiao, "What is this coal?" ”

Coal is coal, and coal is a natural substance formed by carbonization after trees were buried in the ground many years ago.

However, it is estimated that Li Zhi may not believe it with this explanation, and Li Xiao said simply, "Charcoal is a stone that can burn, with a black appearance, but strong firepower, which is not much inferior to charcoal." If you find the right vein, you will continue to dig out the energy, which can not only be used to smelt iron, but also to boil water for heating. ”

"There are such magical things in the world, why have I never heard of them?" Li Zhi was puzzled, he might not believe what others said, but what Li Xiao said, he couldn't help but believe it a little.

"Your Majesty, the Book of Mountains and Seas calls it Shi Nirvana, and the Taoist Book of the Wei and Jin Dynasties calls it graphite or charcoal, and it is also used for alchemy. However, this thing is useless to make medicine in alchemy, and its biggest effect is to burn and heat. ”

Coal was discovered and used in ancient China quite early, but in many cases it was used in limited quantities. For example, until this time, coal was still more like a pill, and like sulfur and saltpeter, it was only sold in pharmacies.

Some merchants dig mines and hire people to dig up coal and sell it.

It's not unusual for the emperor not to know.

"Is coal really so good? Can it replace charcoal? ”

Of course you can, charcoal is not easy to fire, first to cut down trees in the mountains, and then install a kiln to burn charcoal, the process is many, the transportation is not convenient, and the efficiency is not high.

But coal is different, if you find a mine, then you will continue to mine the energy, and this amount is not a level.

"I'll have people buy some and try them out." Li Zhidao.

Try it, just try it, and you'll know if you try it anyway.

The emperor is here, Li Xiao remembered his organic fertilizer business, and he was unwilling to miss the opportunity at the moment, so he hurriedly told the emperor about his plan to establish the 241st line of Chang'an.

"Two hundred and forty-one? Is this a new line? Li Zhi asked.

For example, we are going to set up 600 public toilets in the streets of Chang'an, the city gate and the east and west cities, and hire some elderly and infirm people in Chang'an to clean the public toilets and streets········ In the future, the streets of Chang'an will be clean and tidy, and there will never be a cross-flow of feces and urine, and sewage will run wildly, and even the horses and mules that enter and leave Chang'an City will have to install a fart pocket behind the horse's tail to collect the feces and not pollute the streets. ”

Li Xiao describes a clean and beautiful street in the future.

"How do you have this idea?" Li Zhi didn't expect Li Xiao to still have the heart to think about these little things.

"In fact, this matter is not the idea of the minister, it is the idea of the former prime ministers such as Sun Gong and Yu Gong, Han Gong, Chu Gong and so on, although they have retired, they also want to contribute light and heat to the imperial court, and want to do something practical for the people of Chang'an, and make a contribution to the beautiful imperial capital of the majestic imperial city·······"

It was actually planned by the eldest grandson Wuji, and Li Zhi felt that there might be a deep meaning in it.

But Li Xiao said that although this matter was planned by several old ministers, a few old people didn't have the energy to take care of it, so they paid 2,000 yuan and handed it over to the ministers to take care of the matter.

"You've been in a lot of dealings with the Taishi lately?" Li Zhi has something to say.

"Your Majesty cares for a few old ministers." Li Xiao also had something to say.

I know you don't worry about them, I'll help you spy on them, I'm a loyal minister, praise me.

Li Zhi nodded, and those who knew me were indeed Li Asan also.

"Just leave this matter to the Yongzhou Mansion, you still have to supervise the corn." Li Zhidao, how can a big talent be of little use.

"If this matter is handed over to the government yamen, I am afraid that although the original intention is good, it will inevitably change after a long time. In fact, as long as Your Majesty gives a decree to the Yongzhou Yamen and let them grant me the land to build a public toilet, I will naturally handle other things, and I don't need to pay a penny from the court. ”

Li Zhi laughed, "The tone is not small, you don't need the court to pay a penny, can you do things well?" ”

"Yes!"