Changjian led Xue Lang through the corridor and alley, and stopped in front of an arch: "Lang Jun wait a minute, the little one will go and call someone to report." ”

Changjian stepped forward and said a few words to the guard, the guard went in to report, and after a while, someone came to lead Xue Lang in, and Changjian waited for him.

followed the guards in, it was still the same room yesterday, except for the maids and chamberlains, there was still only Lady Liu accompanying her.

Today, both girls are wearing skirts, Her Royal Highness the princess is dressed in black, black silk, and there are faint complex and elegant patterns on the satin, which is brilliant and very beautiful.

Lady Liu wore a light blue dress with white piping, embroidered with flying butterflies at the corners of the skirt, and her eyebrows and phoenix eyes, which was very elegant.

These two people are sitting like this, it's a sight, it's really beautiful.

Seeing Xue Lang coming in in an ancient costume, Her Royal Highness the Princess's eyes narrowed slightly, and her expression did not change much: "What happened to Youyang?" ”

Xue Lang followed the guidance of the maid and knelt down to the head of Princess Pingyang, put the box he was holding on the desk, and said with a smile: "I was sorting out my luggage just now and sorting out a little thing, I think about it, His Royal Highness should be useful." ”

Hearing Xue Lang say this, Princess Pingyang showed a look of interest: "What? But it was brought from the Franc machine? ”

Xue Lang nodded and asked, "Dare to ask Your Highness, have you heard of these two crops, sweet potatoes and potatoes?" ”

Princess Pingyang shook her head: "I haven't heard of it." What is it? ”

Xue Lang didn't answer, but continued to ask: "Dare to ask Your Highness how much grain can be produced in one acre of land in the Tang Dynasty today?" ”

Princess Pingyang's eyes lit up: "In Guanzhong, the yield per mu of high-grade fertile land can reach more than three stones, and if it is a barren land, the yield per mu is less." ”

Three Stone ...... One stone is equal to ten buckets, and one bucket is about ten catties, that is to say, the output of good land is only more than three hundred catties.

Sure enough, there is no chemical fertilizer, there is no more scientific farming methods in ancient times, grain production is extremely low, plus all kinds of taxes, there are few people who can be full, no wonder the ancient people almost have no ability to resist disasters, but where there is a little natural and man-made disasters, almost starvation everywhere, miserable. In the final analysis, food production is too low.

Xue Lang was determined, and he didn't sell it, he opened the box directly, and handed the box to the maid: "Your Highness, please take a look!" ”

The box contained two sweet potatoes, a potato, a handful of peanuts and a handful of pumpkin seeds.

Princess Pingyang took the box brought by the maid, and her eyes showed a strange light: "What is this?" Is it edible? ”

This question made Xue Lang feel a sense of intimacy-

Sure enough, it is worthy of being a citizen of my big food country, and when I see something, the first thing I care about is whether I can eat it.

Xue Lang said rudely, stood up, and pointed to the contents of the box to make an introduction: "This thing is called sweet potato, also called Gan Department, red lotus, has the effect of replenishing deficiency, strengthening the spleen and appetizing, strengthening the kidney yin, can be used as food, can also be used as vegetables, with high yield and stable yield, drought and barrenness, less pests and diseases, etc., easy to plant, easy to store, the yield per mu is 1,000 catties, that is, more than ten stones!" If the fertility can keep up, it can produce up to about 20 stones. ”

"Poof~"

This is the water in the mouth of the female officer Liu who was so frightened!

Princess Pingyang deserves to be a black-bellied leader, very calm, if it weren't for Xue Lang paying attention to her, she wouldn't have noticed her palm, suddenly shook it, and then let go again, her face remained indifferent, and she seemed to be calm and took a sip of water.

Your Highness, your Qi cultivation kung fu is so good, does your father know?

Xue Lang said that he was ashamed.

Female Official Liu obviously didn't have the qi cultivation kung fu of her leader, and her voice was about to change tone: "Master Xue, is this true?" ”

Xue Lang nodded solemnly, this is still based on the ancient planting level and the lack of chemical fertilizers. Lady Liu leaned forward in a faux puff, stared at the sweet potato with wide eyes, and couldn't see the flowers-

In this era when the yield per mu is only more than 300 catties, the yield per mu is like a myth.

Princess Pingyang's eyes closed slightly, and then opened them again: "What are the other three?" Or food? ”

Xue Lang nodded and pointed to the potato: "This little thing is called a potato, also known as a potato and an artichoke, which is the same as sweet potatoes, and it is also a food that can be eaten and easy to store." The planting conditions are slightly higher than the requirements of sweet potatoes, mainly because the water and fertility required are higher than those of sweet potatoes, but they are also easier to sow than wheat and rice, except for saline-alkali land, as long as they can be watered, they can be planted, and the yield can reach at least more than 3,000 catties per mu. ”

"Shhh

This is the sound of female officer Liu gasping, and her mouth is so open that she can see the back molars...... Well, the teeth are healthy and there are no cavities.

Princess Pingyang didn't move, only closed her eyes gently, shrunk her hands into wide sleeves, and sat on her knees, silent as an abyss.

It's really calm!

Xue Lang continued to drop the bomb: "Potatoes in the Franco, someone has hit the yield of 10,000 catties, but to achieve the yield of 10,000 catties requires more fertility, we can study this slowly, it may not work to increase to this yield, but it is not difficult to be higher than 3,000 catties." ”

Her Royal Highness the princess Huo Ran got up: "Can this thing really produce more than 3,000 catties per mu?" ”

Xue Lang raised his right hand and made a guarantee as a member of the Communist Youth League: "This is the minimum standard, and further production needs to be kept up with fertility." The key lies in fertility and cultivation techniques. ”

Her Royal Highness stood silently for five seconds, then sat down again, and then asked, "What is this?" ”

Xue Lang continued: "This is a kind of seed called pumpkin, which can produce a fruit called pumpkin, and the fruit can also be used as food to satisfy hunger when it is not eaten. Rattan can clear heat; The leaves have the effect of stopping bleeding and relieving pain. The most useful is melon seeds, which can control and kill blood-sucking insects, and there is no harm in eating them often. ”

"Vampire?"

"It is a relatively common parasitic disease, many places with many waters are prone to disease, and this disease is contagious, often eat some pumpkin seeds, do not drink raw water, can effectively control and prevent."

Princess Pingyang nodded, and then asked, "What about the planting conditions and the number of mu yields?" ”

"Planting is simple, it doesn't necessarily have to be farmland, it can be planted in the woodland, in the corner of the wall, in cold places, hot places, and the yield per mu is quite high, but I haven't paid attention to it before, and I don't know the actual quantity."

Pumpkin is probably the most widely planted vegetable in China, and it is planted in the southeast and northwest, and it can be full during famine; In the poor mountainous areas where transportation is inconvenient, there are still people who cook fruit and snack for children.

"What is this thing?"

Princess Pingyang pointed to peanuts. Xue Lang said: "This is called peanuts, the oil is good, and it is a good nut, and it tastes good." ”

Hearing that it was not food, Her Royal Highness the princess seemed to be a little disappointed, did not speak, only stood up, and slowly paced in the hall: "The several crops that Youyang took out have never been planted in Datang. These are the young yang brought from the Franc machine? ”

Probably because he said it too many times, he was deceived, Xue Lang replied without changing his face: "Yes, I ate a lot on the way, and these are the leftovers." ”