The Chinese nation has always been a very, very intelligent nation, and for thousands of years, they have established a brilliant civilization and many inventions and creations. If it weren't for the fact that since the Han Dynasty, Confucianism has become the dominant family, thus suppressing and smearing and resisting other doctrines from the official level, I am afraid that I really don't know what the future of our nation will look like.

Even so, the industrious people and those who account for a small number of people of insight can also discover and sum up all kinds of experiences from the accumulated labor, and leave a piece of spiritual wealth for future generations.

In modern times, farming has actually become a thing that can be successful without much experience, as long as everyone follows the arrangement of agricultural scientists step by step, sowing, fertilizing, weeding, and exterminating insects, and finally, in the harvest season, you can always get a good result. In ancient times, however, it was a real art, and farmers tried their best to ensure the fertility of their own acres of subsistence land.

They don't know what nitrogen fertilizer, phosphate fertilizer, or trace elements are, but they have summed up the methods of rotational tillage, intercropping and deep ploughing, and they are also looking for resources from life and nature to help them, even if they are completely unclear about why these resources can get such results, but it does not prevent them from using these methods.

At the beginning, Li Tianyang always thought that the farmers in the village did not even know how to use the excrement in the pigsty at home, but who knew that when he learned about farming, he knew how superficial he was. Although the people in the village are not so hygienic, every house will emit a foul smell from every house, and the source of these stenches is, of course, from those open pig pens.

When the manure in the pen has accumulated to a certain extent and time, the farmers will collect the fermented manure and scatter it in their own fields. And when Wu Daoli led everyone to use the leftover fish bones and other bones in the village, burned them into piles of ashes, grinded the ingredients, and sprinkled them in the fields; When he led the teenagers to dig out a fish pond with the water from the stream next to the farm, and regularly took everyone to clean up the silt in the fish pond and pick it up to the ground; All of this made Li Tianyang hide his face and flee, ashamed of his ignorance.

And when Wu Daoli led everyone, taking advantage of the unique climate of Qiongzhou, he showed some of the cultivation skills accumulated over the decades, which made Li Tianyang even more dumbfounded. A piece of land, in Wu Daoli's hands, was squeezed out of every bit of potential by him, and he played with flowers. Coupled with the books he collected about agriculture everywhere, he finally opened his eyes to the profound heritage of this farming country.

Today, the fertilizer that Li Tianyang wants to apply to the sweet potatoes is farmhouse fertilizer that has been fermented for a long time. Ordinary people always wait until it is time to apply fertilizer before collecting the manure in the pig pen and transporting it to the field, because they do not have many pigs and cattle at home, and even if they add their family's excrement, the fertilizer does not accumulate quickly. Li Tianyang's camp is different, with a group of children and adults working in their camp, the camp accumulates more than 500 excrement a day. Not to mention that they also have a huge breeding farm, chickens, ducks and other poultry and livestock excretion does not seem to be much, but they can't withstand their huge numbers, and the manure collected every day is hundreds of catties!

Other families are worried that there is not enough fertilizer, but they have to worry that their own fertilizer will not run out. In order to solve this problem, the camp has thought of a lot of ways, after all, it is a pity to lose such things, but if there are too many piles, it will bring too much trouble to the camp. Not to mention that these fertilizers are rotten and fermented under the sun, and the smell can spread far away, just because these things may bring the danger of disease to the camp teenagers, which is not acceptable to Li Tianyang.

Almost half of the children in the camp are under the age of 12, and everyone knows that children are not in good health, so they are more vulnerable to the virus, and in this era of medical development, even a minor illness can bring the shadow of death. When solving the fecal problem, Li Tianyang realized that these things could be sold for money in this era, which made Li Tianyang dumbfounded. What made him even more unexpected, and made him blame himself, was that these dung turned out to be the source of saltpeter, an important raw material for making gunpowder.

And this, in fact, is not uncommon in the online novels he read at the beginning: gunpowder, glass and cement, these are the three magic weapons of the traverser! Li Tianyang regretted that he was too embarrassed to read the novel at the beginning, and now it is not easy to think about it again.

Fortunately, the wise people of this era already knew how to collect nitrate to make saltpeter by accumulating manure in a shady place. In Tanmen Village, there is a craftsman who specializes in making fireworks and firecrackers who knows these methods. Saltpeter and sulfur, in the Ming Dynasty, are also controlled products, and they are never allowed to be bought and sold on a large scale.

Although Li Tianyang does not have a dedicated team to develop firearms, as one of the most important components of firearms, gunpowder, which is not too expensive, can be studied and improved now. From the moment he knew the production method of saltpeter, Li Tianyang decided to establish a saltpeter production plant, even if there was no large amount of gunpowder consumption now, but when it really came time, Li Tianyang was worried that he would have to worry about the source of these raw materials.

So Li Tianyang found a shady place near the mountainside of a small hill far away from the camp, and established a saltpeter field, which was managed by a special person. And because of the production of saltpeter, the fertilizer that had been left in their camp for too long and could not be used up was sold by him to the families of the camp teenagers at a lower price, which not only made them accept their affection, but also brought a little income to Li Tianyang's camp.

It's not that Li Tianyang is reluctant to give away these things for free, it's just that when he was in the first disaster relief, he saw too many homeless people repaying virtue with grievances, which made him have more eyes for these poor people in the Ming Dynasty from then on. Sometimes, when you're doing business with them, you're helping them and giving them peace of mind. Originally, Li Tianyang didn't care about this thing, so his price was set very low, and a copper plate could get more than 100 catties of fertilizer, which was definitely a price that all families in the village could afford.

It's just that these fertilizers have to be supplied regularly and quantitatively every day, otherwise Li Tianyang and them really can't satisfy the villagers of the whole village, and they will be covered by the old wealth of a landlord like Wu Yongkang.