Liu Feng couldn't believe that the formula Su Jinli took out was real.

If he could burn glass out of sand, wouldn't all his years of hard work be a joke?

In order to buy water jade to burn the glass, he almost lost all the family business, but now he tells him that the practical sand can burn the glass out?

Liu Feng couldn't believe it.

But Su Jinli is his savior, and now she is the high-ranking princess of Qin!

Even if he was full of doubts, he didn't dare to say it.

He quietly settled down, grabbed the formula in his hand hard, knelt on the ground and said: "Don't worry, master, my subordinates will do their best to burn the glass for the master!" ”

Su Jinli looked at him through the screen and bead curtain: "This recipe was obtained by accident, and it looks really incredible." I know you must have a lot of questions on your mind. But I still hope that you can put away your thoughts now and try this recipe for yourself! ”

Liu Feng's heart was indeed full of suspicion, but after he heard Su Jinli say this, he still put away those chaotic thoughts and said solemnly: "Subordinates obey orders!" ”

Su Jinli saw that he was kneeling on the ground, still a little unaccustomed, so he said: "You go, it doesn't take much time to burn the colored glass, and the results will come out soon." ”

"The subordinates will go to open the glazed kiln, strive to burn the glaze as soon as possible, and retire first."

After Liu Feng finished speaking, he retreated and went straight to the glazed kiln under the Hidden Treasure Mountain.

Then according to the recipe given by Su Jinli, he began to burn the glass.

Su Jinli asked Liu Feng to burn the most common silicate glass in later generations, although it was fired with sand, but in fact, it was not ordinary sand, but quartz sand.

Quartz sand, soda ash, feldspar and limestone are used as raw materials, and after mixing, high-temperature melting, homogenization, and then processed into shape, and then annealed, a variety of glass products can be obtained.

It is not difficult to burn glass, but it is difficult to control the quality.

Because once it is not well controlled, there will be air bubbles in the glass, resulting in the final product is not beautiful enough.

In addition, the different metal components contained in the glass will also lead to different colors in the final fire.

These problems will arise when firing glass, and we can only continue to find ways to solve them.

However, Su Jinli is still more confident in Liu Feng.

Although Liu Feng has wasted a lot of water jade, he has burned the glass for so many years, and he has experience, and with him watching, it should not be long before the glass can be burned out.

Thinking so, Su Jinli was ready to wait for Liu Feng's good news.

Who knew that the good news hadn't waited yet, but he waited for Chu Yan to come back first.

Chu Yan had already received a secret report and knew that the glass kiln had been built, and the Liumad who had been rescued by Su Jinli before had come to see her.

He felt a little sour in his heart, so he couldn't wait to run back, and as soon as he saw Su Jinli, he asked, "This king heard that the glazed kiln has been built." Do you really think that Liu Feng can burn the glass? ”

And that recipe, is it really okay?

Chu Yan didn't have much confidence when he thought of that strange formula.

Those raw materials are too bad compared to glass, can they really be burned?

If this fails, the ministers who know about it will not know how to laugh at it.

However, he only dared to think about these words in his heart, but he didn't dare to say them in front of Su Jinli.

Afraid that Su Jinli would be unhappy, Chu Yan added: "I don't doubt you, but I just don't think that Liu Feng looks like he can do things." ”

He didn't forget that Liu Feng was called a Liulunatic, and in order to burn out the glass, he almost blew himself up alive!

In the end, it was Su Jinli who took action to save his little life.

Thinking back on this, Chu Yan was a little dissatisfied.

What is Liu Feng?

Where is it worthy of Su Jinli to save people in person?

What a bargain for him!

Su Jinli looked at Chu Yan's changing face, and was speechless for a while.

She was too lazy to talk nonsense with Chu Yan, so she simply pretended to be a magic stick: "Lord Wang, don't worry, I have a hunch that Liu Feng will definitely be able to burn the glass." ”

Chu Yan: "......"

Coincidentally, he didn't have this hunch.

Su Jinli saw that he didn't believe it, so he smiled and said, "If the prince doesn't believe it, why don't we make a bet?" ”

When Chu Yan heard this, his heart instantly stirred.

He knows Su Jinli's temperament, she dares to say this, she must be sure!

Tsk, how the previous stewards were calculated by Su Jinli, he hasn't forgotten!

Thinking of those stewards, Chu Yan couldn't help but think of the fertilizer mentioned by Su Jinli before, and couldn't help asking: "I remember that you said before that you would let those tenant farmers use your fertilizer, this fertilizer...... What are you going to do? ”

Su Jinli did not panic at all.

She had only recently rummaged through all the books in the space and found a lot of good things, including the recipe for soil and fertilizer.

For example, soil ammonia can be used with 100 catties of fresh cow dung, one or two of soybean flour, and 10 catties of cooked gypsum powder, sealed and placed below 25 degrees for three days, and applied with three times the water, and the fertilizer efficiency is higher than that of ammonia.

For example, this kind of soil ammonia can be used after three days of sealing, and the effect is very good, so there is no need to worry about delaying this spring ploughing.

After she came back from Zhuangtian that day, she asked Ping'an to go back to the Marquis of Wuyang Mansion and borrowed a group of people from Su Xin to manage the land she bought.

And handed over all the soil fertilizer formulas they found to them, and let them make soil fertilizers according to the formula.

At this time, the first batch of ammonia is almost ready for use.

In addition to soil ammonia, there are several other formulations of soil fertilizers.

For example, ammonium sulfate can be used for fertilization by using 100 catties of human urine, 10 catties of cooked gypsum, and 50 catties of water, mixed and stirred, and then sealed and placed for ten days, which can be used for fertilization, and the fertilizer effect is equivalent to ammonium sulfate.

There is also soil compound fertilizer, which is to crush and sieve superphosphate, and then mix 200 catties of superphosphate with 240 to 300 catties of human urine after stirring evenly, pile it into a conical shape, seal it tightly with a thin mud three centimeters thick, and then stack it for seven days, it can be used, and the fertilizer effect is ideal.

Superphosphate itself is a phosphate fertilizer, which can be prepared by decomposing phosphate rock with sulfuric acid and used directly as phosphate fertilizer. After making compound fertilizer, the effect is naturally more ideal.

In addition to this, there is also potassium dihydrogen earth-phosphate, which is easier to make and does not take much time.

The raw materials only need superphosphate, plant ash and hot water, and only need to dissolve superphosphate and plant ash with hot water in the ratio of two to five, and mix them after static filtration, which can be made into a crude liquid containing potassium dihydrogen phosphate, and the effect is similar to that of potassium dihydrogen phosphate.

Finally, there is soil nitrogen, ammonia and phosphorus compound fertilizer, which can be ground into powder directly from animal bones. However, this bone powder takes a long time to take effect, which is somewhat equivalent to the slow-release fertilizer commonly used in modern times.

Su Jinli couldn't help but raise the corners of her lips when she thought of this.