I do research in ancient times

In fact, the reason for holding agricultural lectures is not only to find something for old man Liu to do, but also out of the consideration of this main task.

The main theme of the second stage is grain storage, that is to say, in the first year of entering the Little Ice Age, Mozong is likely to encounter extreme weather changes.

In the history of China, several of the largest social unrests were closely related to the Little Ice Age.

It was the first time from the end of the Yin and Shang Dynasties to the beginning of the Western Zhou Dynasty, the second time from the end of the Eastern Han Dynasty and the Three Kingdoms and the Western Jin Dynasty, and the third time from the end of the Tang Dynasty to the beginning of the Song Dynasty. The first three times caused the population of China to drop by more than four-fifths.

By the fourth time, the population of the whole country had only been reduced by half in the late Ming and early Qing dynasties, thanks to the introduction of the three giants of potatoes, sweet potatoes, and corn in the Ming Dynasty!

Grow food!Grow food!Grow food!

The important thing was said three times, but Ning Saw, who was holding the Big Three, still felt unsafe.He couldn't sleep for the past two nights. Apart from harassing Zha Tong to inquire about information, he was thinking hard about how to ensure food production.

Rely on the sky, the sky cannot be relied on anymore, you can only rely on yourself.

Chinese people, the rule handed down from their ancestors is that personal struggle can change destiny, move mountains and fill seas as soon as you say it, and find a way when you encounter difficulties.

So when he couldn't sleep, Ning Zaozi listed a series of problems that might be encountered in farming on paper, and then paid attention to thinking about the countermeasures.

The key to the problem is technology.Farming has never been a job that can produce high yields and harvests with great effort. It still requires scientific methods, experience accumulation and overall planning.

For example, intercropping, planting different types of crops on the same land according to a certain row, plant spacing and width ratio of land occupation, making full use of space and time, and maximizing limited farming resources as much as possible.

Technologies such as mechanical farming, mulching film and greenhouses are temporarily unthinkable, but fertilizers must be used well!

The arable land beside Jiuling Lake is black soil, and the fertile soil can grow almost all crops.But if it is used unrestrainedly and arrogantly, the harvest and production may be reduced next year, ruining such a good field for nothing.

The Little Ice Age was not a one-shot deal. Hundreds of years of freezing periods were normal. It was necessary to ensure that the land could be cultivated sustainably and yield high yields during the lifetime of Thanin Saw.

Ning Shaozi himself has never planted land, but he knows chemistry!

There used to be a classmate who studied compound fertilizers, and would chat with him when he was free. Ning Sawzi knew more or less about compound fertilizers.

For example, special fertilizers for potato crops are mainly aimed at potatoes and sweet and white potatoes, and there are some differences in the composition of the two.Ammonium nitrate and potassium sulfate are essential, and special fertilizers for potatoes should be added with trace elements such as heavy calcium and boron.Sweet potatoes prefer calcium, magnesium and phosphate fertilizers, and there are differences in the formula ratio.

Corn is simple, urea potassium sulfate ammonium dihydrogen phosphate, some ingredients in this formula can also be replaced with special fertilizers for potatoes and sweet potatoes, and these ingredients cannot be escaped.

Mo Zong is currently making coke, and Ning Fei chose a domed down-flame coke oven.The carbonization chamber and the combustion chamber of the downdraft furnace are separated by a brick wall, but the upper part is connected. The gas produced in the carbonization chamber is transferred into the combustion chamber, and air is introduced from the upper part of the combustion chamber to burn the gas, thereby providing part of the heat and reducing pollution emissions.It's just that this kind of coking oven can't recover chemical products, and can't control the amount of gas generated in the talking room. At the end of coking, the heat supply is often insufficient due to the small gas output, which affects the quality of the last batch of coking.

Every time I think of the coke oven gas that is lost into the air with the smoke, ah, ah, it is the raw material of fertilizer to ensure high yield and harvest! !He Ning saw his heart throbbing with pain.

It's not that he doesn't want it, but under the current technical conditions, it is unrealistic to build a complete coking industrial tower.These processes are not technical secrets to him, and he can write a paper on the principles and processes without getting stuck.This can be replaced by building a complete set of equipment, which is a bit more difficult.

Among other things, he can't build the ammonia water clarification tank for processing raw gas, the desulfurization tower, and the ammonia washing workshop, all of which can only be imagined when dreaming.

Without a stable power supply, accurate temperature control and air pressure control, even if you barely build a simple version, it is just a large gas chamber.Ammonia gas is poisonous and can irritate the mucous membranes of the human body and cause suffocation. The hydrogen sulfide in the crude gas is even more poisonous. If you are not careful, everyone will have to follow the old road of six generations.

It's not that Ning Zazi never thought of asking Zha Tong.

Zha Tong has been a little depressed these days, and the father of the funder will pretend to be dead online if he doesn't call him, and he won't "kiss and kiss" rainbow farts anymore.

Thinking about the coking tower in the middle of the night caused insomnia, so Ning Zaozi simply summoned the chat customer service and asked if the system could be exchanged for a complete set of equipment.

"Is the host telling a joke?"

Zha Tong was reluctant.

"When the system was bound, the rules were clearly stated. It is impossible for equipment and blueprints beyond the technical line to appear in this era. This system is for customers in all spaces and timelines of the whole plane. It is used in the world where the host is located, even if you save enough mall points to redeem it, it cannot be brought into reality.”

"I know."

Ning saw that he touched his nose.

"That's why I ask you, can't you open the back door to do dirty XX transactions? Is there any way?"

System Intelligence: ...

——System Intelligence: Host, this intelligence is serious, and does not do dirty PP transactions.

Ning Fei: Oh so, forget it.

Ning Fei: Speaking of which, I have always wanted to ask you something.

——System Intelligence: Please tell the host.

Ning Fei: That’s right, didn’t you give me a potato field at the beginning?Then let me grow cotton in that valley.

Ning Fei: Look at your cotton, it was already in July and August when it was planted, and I will finish harvesting it in mid-November.Even if I have no common sense of agriculture, I know that it is impossible for cotton to grow in this latitude, temperature and climate.

Ning Fei: But your land has been planted, what do you think is going on?

System Intelligence: ...

Ning Fei: Don't pretend to be dead, I'm waiting for your answer.Didn’t you keep saying that it meets the technical conditions of this era, so please explain to me what’s going on with this supernatural land?

System Intelligence: ...

——System Intelligence: Kiss, don't get excited, just listen to me!

Ning Fei: ...

Ning Fei: As soon as you call me dear, Zha Tong, I feel that there is a dirty XX transaction with this place.Did you smear Yue Wanzha again?

System Intelligence: ...

——System Intelligence: No, dear, that piece of land... is actually a novice reward from the previous host.

Ning Fei: What?What are you talking about?Isn't that my reward?

- System Intelligence: No... no... no no no... not all...

Ning Fei got up from the kang, leaned on the kang cabinet, and picked his ears.

"Don't worry, just make it up slowly, try to make it complete once."

System Intelligence: ...

——System Intelligence: No, kiss, I didn't lie.That field was a lucky gift package given to the first bound host after the system started running.

——System Intelligence: Kiss, do you still remember the lucky draw when you completed the main task for the first time?According to the system rules, all gifts are limited to the host who completed it for the first time, because the first host is almost self-made, so the system will give more stuff.

——System Intelligence: Then the following hosts, the system can enjoy the foundation laid by the first host by default, so there is no extra gift.Kiss the lucky draw, the main reason is that the first host did not complete the main task, it is a bug left over from history... But that field was originally the first bucket of gold given to the first host by the system, including a piece suitable for planting Various crops, land where the weather and pH can be ignored, and a basket of high-yielding disaster-resistant and drought-resistant potato seeds.

——System intelligence: However, the former host didn't want to do farming, so he threw a basket of potatoes as a gift in the field, deceiving the kind and simple people to go out of the mountain and fight for world hegemony...

——System intelligence: After many years, the box of potatoes grew longer and more, and became a potato field... The explanation given by the system is that the land is just located in the valley of Niubei Mountain, surrounded by high mountains, It is majestic throughout the year, and there is geothermal heat under the soil layer, which prevents the cold current coming from the south from sinking to the bottom of the valley and turns into rain. The four seasons are like spring, humid and warm.

Ning Fei: Heh.

Ning Zaozi: Okay, everything your system says is right.

Ning Saozi: So according to your explanation Zha Tong, I can plant any crops on that land, regardless of time and solar terms, right?

——System Intelligence: Yes...but it's not true, it's not that exaggerated, it's just relatively easier to plant, and the land is not omnipotent.

——System intelligence: Moreover, the effectiveness of the land has a protection period, which is about 180 years. After checking the records, there are about 6 years left, and the bonus effect of land fertility will disappear with time.After the expiration, the valley is just an ordinary piece of land with a suitable climate, and there will be no other effects.

Ning Fei: Heh.

Ning Fei: You still said you were naive and innocent, and when you lied to me, you said that you said a big gift package for beginners when you bound it, and it also came with a map of Niubei mountain mines, making it seem like I took advantage of you.In the end, I was actually picking up leftovers, right?Yue Wanzha didn't want that field, and the potatoes were not prepared for me, they grew naturally after being thrown away.Where did the original innocence go?Find a car wheel and Zhatong station in front of me, is there anyone who complains to you?

System Intelligence: ...

After scolding the scumbag, although he let out a lot of anger, it didn't help the reality at all.

Ning saw that he didn't go to bed anymore, and simply pulled the Kang table in front of him, thinking about how to produce some fertilizer under the current technical conditions.

Thanks to the classmate who studies chemical fertilizers, he has also read some introductions about the history of fertilizer development. For a while, he wanted to try out his own laboratory to see if he could come up with a patented formula or something.

However, this failed in the end due to many reasons, the most important being that his physical condition was not suitable.

But it's not bad, at least he read a lot of literature about fertilizers in the early stage, and now in retrospect, he can still write out some impressive content silently.

Ning Fei thought for a while, grabbed the pencil she ordered in the carpentry class, and wrote four large characters on the birch bark.

——Indigenous fertilizer.