It was an unexpected joy to get ambergris from the stomach of this whale, which made Dai Yan excited for a while. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 But then he got a little bored with the process of the sailors refining whale oil, and he left the shore of the island and began to wander around the island.

For this small island, he casually glanced at this small island when he logged in with the fleet before. The size of this small island is not too large, and it can almost be seen at a glance, so Dai Yan is not worried about any danger on this small island.

However, when he walked around this small island, he felt very strange, the land on this small island was sandy, but there were large white stones everywhere, and Dai Yan didn't care at all.

However, when he saw with his own eyes flocks of seagulls roosting on the sand of the island, leaving behind a large amount of excrement, he was a little suspicious of these "stones", could these be the legendary struvite stones?

Dai Yan had some doubts in his heart, but he never dared to go into detail that these stones really contained phosphate and could be made into struvite with natural phosphate fertilizer. After all, in the era after Dai Yan's crossing, he had never heard of struvite on the islands of the Yellow Sea and the East China Sea.

In fact, this is Dai Yan's loneliness, the desert islands off the coast of China have always had struvite containing phosphate. Since China has been an agrarian country for thousands of years, the use of the sea is extremely low, and since ancient times, the Chinese have not noticed the use of these struvite stones on the coastal islands. Therefore, these ores, which are rich in phosphorus and can be used as phosphate fertilizer, have been quietly staying in the coastal areas of China, and no one has ever had the idea of fighting them.

However, since the Industrial Revolution, China has become a backward country, and Japan, an island country in eastern China, has risen to become a capitalist power after the Meiji Restoration, and has fully realized the value of struvite on China's coastal islands.

The phosphate fertilizer made of struvite was also used by Japan in Taiwan and Northeast China, which greatly increased the grain production of these two lands belonging to China, and these grains also became the military food for Japan's invasion of China!

Even the whales that Dai Yan sees on the surface of the sea today were originally creatures that can be seen in the coast of China and even in the world's oceans. However, in order to protect the "traditions" of its own country and solve its own food problem, Japan in the East insisted on using modern means of whaling, and as a result, the entire coast of China became extinct! And they didn't stop there, they sent modern fleets to the world to hunt whales, and finally made whales, a common creature in the ocean, an endangered and protected animal!

There is a disciple of the Mo family on the ship that followed Dai Yan here, he is a talent that Dai Yan has tried to promote after establishing the chemical system, Dai Yan took him to this Yancheng, originally wanted him to investigate what minerals are near this Yancheng.

Dai Yan established a chemical system, and naturally told these disciples of the Mo family how to detect various substances, and the things they had in their hands were obtained by Dai Yan at any cost, and it was still possible to detect the composition of some substances.

For these white stones, Dai Yan guessed that there was phosphate in them, so they used their own methods to verify them.

To determine the composition of phosphate, it is necessary to react with ammonium molybdate under acidic conditions to change color, and the content of phosphate fertilizer in the article can be accurately determined by this method. Dai Yan's requirements for the content determination of these stones are far less high, he just wants to know if there is phosphate in these stones to verify whether these white stones are phosphate.

I have to say that Dai Yan's luck is very good. After a simple experiment by the disciples of the Mo family, he was basically able to determine that the white stones that could be seen everywhere on this small island were struvite with phosphate!

Phosphorus is also an element that is essential for plant growth, and in the past, people wanted to get a little phosphorus fertilizer, but they could only grind animal bones into powder, and get a small amount of phosphorus fertilizer.

Even such a small amount of phosphate fertilizer has a great effect on the development of agriculture! As a traverser, Dai Yan certainly knows the important role of this fertilizer: it can improve the soil!

Especially for today's Dai Yan, the value of phosphate fertilizer is even more important than nitrogen fertilizer! In the territory owned by Dai Yan, whether it is Fengyi or Taoqiu, in fact, the vacant land occupies an absolute majority of the land compared to the land that has been cultivated.

However, if Dai Yan does not reclaim these lands, there is actually no way. These lands are actually red soil rich in iron, aluminum and other elements, and the soil is too acidic to be used for cultivation at all!

As a traverser, Dai Yan is certainly knowledgeable. He knew that the red soil was only lacking in alkali metals, and that if alkali metals could be added to these lands, such as by sprinkling lime, the properties of these lands could be gradually improved.

With coal in Dai Yan's hands, he can definitely burn a large amount of lime at any cost. However, with an abundance of lime, these red soils are not really suitable for farming!

Because the red soil also lacks one element that is essential for plant growth, and that is phosphorus!

If a plant lacks phosphorus, it will affect the growth of its roots, making the crops planted very prone to lodging!

In order to increase the cultivated land in his territory, Dai Yan actually thought of various ways to obtain phosphate fertilizer, such as collecting the leftover bones of the Taoqiu people and the Fengyi people through various means and grinding them into powder; The common people of Fengyi were encouraged to raise chickens and collect chicken feathers to burn them to ashes. The phosphate fertilizer obtained through this means did help Dai Yan increase some of his cultivated land.

However, the phosphate fertilizer obtained by such a method is indeed a drop in the bucket. China's land is actually a general phosphorus deficiency area, and we will never be too little phosphate fertilizer, not too much!

Now on this small island, there are struvite all over the island, which is almost effortless for Dai Yan to obtain a large amount of phosphate fertilizer!

With these phosphate fertilizers, Dai Yan will be able to at least triple the arable land in his territory, not to mention anything else!

After knowing that there was a large amount of phosphate fertilizer on the island, Dai Yan did not panic. In this day and age, there is hardly anyone but him who can truly recognize the true role of this substance!

And in today's Dai Yan's heart, he still has a deeper consideration: now just by taking a turn on the beach, there is a huge harvest of whales and struvite stones! How abundant are the marine resources of this era?

Since Dai Yan crossed over to this era, he has always understood that China has always been a big agricultural country, and the resources he obtained basically did not jump out of such a box. However, after coming to this salt city at the beginning of today, he saw three kinds of resources that can affect the world from this salt city by the sea: salt, whale oil, and struvite stone!

Maybe it's a good idea to develop the oceans and draw strength from them!

When Dai Yan continued to think, several boats came out of Yancheng on the shore in a panic and headed towards the island!

As soon as these ships arrived on this small island, the noble emperor Fu Yong of the East China Sea disembarked in a panic and asked loudly on the island, "Where is Duke Cao?" ”

When Dai Yan heard this, he immediately came back to his senses and walked back to the shore.

As soon as Huangfu Yong saw Dai Yan, he immediately asked nervously, "Is Gong Cao okay?" When I heard that Cao Gong's boat had been dragged to the depths of the ocean by Kun, I was worried! Cao Gong's golden body, it is too impulsive to provoke Kunyu so disregarding the danger! ”

Seeing the tense scene of Huangfu Yong, Dai Yan's heart couldn't help but warm. He immediately said to Huang Fuyong: "Uncle Clan, don't worry! I didn't kill whales recklessly, I had a deep plan! Yancheng is the product of the cooperation between my Taoqiu and the nobles of the East China Sea, and today I have seen something more valuable than salt on this ocean, so I don't know if my clan brother is interested in in-depth cooperation with us! ”