my scientific age

Chapter 189 is completely testing the imagination of cadres!

"What is the yield per mu of wheat in these fields, Steward Liu, do you know?" Yu Hua asked softly, looking at the golden ocean outside the car window.

Yu Hua didn't know very well about things in the field of agriculture. As a Sichuanese, he was most familiar with rice, not wheat. He was a little curious about the wheat yield per mu during the Republic of China.

"It is estimated that irrigated land can weigh 120 to 180 catties, and semi-sandy land can weigh [-] catties. As for dry land, it can weigh [-] catties to the sky, and most of the time it is about [-] catties. These lands outside should be It’s watering the ground, so it looks like [-] catties is fine.” Liu Wei heard Yu Hua’s question, thought about it, searched for relevant memories in his mind, and said slowly.

"There is only a yield range of 180 to [-] catties?!" Yu Hua seemed a little surprised by this yield data, not questioning the data, but surprised by the fact that the yield of wheat per mu is so small.

less.

It's just too few.

On good irrigated land, the highest yield per mu is only 90 kilograms, while the yield per mu in dry land is as low as 40 kilograms. The harvest after more than half a year of busy work is not enough to fill the belly. Even if the wheat in the northern region can be grown in two varieties a year, the annual output is also Only 180kg-80kg range.

It's so pitiful.

It is no wonder that there will be famines in these years if you are not careful.

Although he knew that the grain yield during the Republic of China was very low, after obtaining the exact yield data, Yu Hua really did not expect that the wheat yield would be so low.

According to a Zhihu discussion article I once read, the yield per mu of super wheat in later generations is as high as 600 kg, and the yield per mu of super hybrid rice that Yu Hua is most familiar with has exceeded 1000 kg.

Putting aside the super hybrid rice for the time being, the difference between super wheat and the current wheat yield is 6.6 to 15 times.

Of course, it is necessary to pay attention to the unit of measurement here. The jin in the Republic of China and the jin in the later generations are both 500 grams. However, the former is 16 taels per jin, and each tael is 31.25 grams, and the latter is 10 taels per jin, and each tael is 50 grams.

The unit of jin is the same, but the unit of two is different.

"This is normal. You have been in the classroom and have not come to the fields. If you can meet such a good year every year, many peasants will not leave their homes. Our people are suffering. Don't look at the fields. For 180 catties of grain, self-cultivators have to pay public grain and various local taxes, semi-owner farmers have to pay half of the rented land, and poor farmers can only harvest half or even 180% of their annual farming. Moreover, the wheat seeds have to be deducted.”

Seeing Yu Hua's deeply touched appearance, Liu Wei sighed softly and continued to explain: "There are also farm laborers, these farmers are the most miserable, they have neither arable land nor houses, they can only work at the landlord's house and produce output. The grain is owned by the owner, the ownership of the land is also owned by the owner, everything is owned by the owner, the food and shelter are insignificant wages, and the number of poor peasants and farm laborers accounts for more than [-]% of the total population of the country.”

Farmers.

This is the main body of the Chinese social class. More than hundreds of millions of farmers have been struggling with food and clothing. For them, no movement or revolution can compare to the crops in the fields.

Humans must first meet their survival needs before they can meet their spiritual needs.

The grain is bigger than the sky and heavier than the mountain.

"One grain of millet is planted in spring, and [-] grains are harvested in autumn. There is no idle land in the four seas, and the farmers starve to death." Lin Wan's voice came out, and a poem described the pains and hardships of farmers.

After a year of busy work, if you don’t have enough food and clothing, you will suffer a devastating blow if you encounter natural disasters, and the scene of Yizi eating each other will continue to unfold.

There was some silence inside the Buick.

A farmer or a Mack who is harvesting wheat in the distance sees a Buick driving smoothly, with a trace of envy and awe in his eyes, and then he immerses himself in work.

"Grain..." Yu Hua stared at the harvest scene outside the window, silently pondering the issue of food. He is a person who thinks about danger in times of peace and has a very strong sense of urgency. He should not worry about the problems of semi-owner farmers and poor peasants. What he cares about is the output of food. .

The importance of food is self-evident. The War of Resistance Against Japan and the famine in Hebei province where 300 million people starved to death a few years later far outweighed the series of serious problems caused by food.

Starvation is the most miserable and pitiful way to die, and there are countless people in China who starve to death.

"Yu Hua, what's wrong?" Lin Wan asked, looking at Yu Hua who was in deep thought.

"It's nothing, I'm wondering if we can cultivate high-yielding wheat seeds through genetic breeding. I once read an article about crop hybridization in a foreign academic journal, which proposed breeding through the hybrid experiment method created by Mr. Mendel. High-yield corn, the yield per mu of the experimental field has reached 217.2 kilograms, which is a great increase. The author of this article is going to tackle the problem of 300 kilograms of high-yield corn." Yu Hua glanced at Lin Wan, and after sorting out his thoughts, he remembered the academic journal he read not long ago. The article, took the opportunity to drag out the method of genetic breeding.

Genetic breeding can be simply understood as cross breeding.

Breeding is a scientific work, and its theoretical basis comes from genetics. Genetics, as a new discipline in the twentieth century, is still in its infancy, and people have not really understood the true value and importance of genetics.

Crop breeding all over the world basically adopts the pure line test method, and only the United States and Germany are at the forefront of the hybrid test method.

It is more difficult to improve crop yield in pure line experiments. The history of Chinese breeding began in 1912. However, crop yield has not been greatly improved at all, and even... nothing has changed.

Because breeding is one thing, and promoting a new variety is another.

Breeding high-yield crops, hybrid experiments are the best method.

Yu Hua has read a lot of historical novels before. Many of the protagonists returned to ancient times to plant high-yield potatoes and high-yield corn, thinking that the yield per mu would not change. In fact, crop seeds have always been degraded and their traits are not stable.

The yield will be very high at the beginning, but as time goes on, the yield per mu has continued to decline.

In order to maintain high crop yields, scientific breeding and hybrid cultivation are required, and continuous investment is required.

As soon as these words came out, the inside of the car was instantly quiet. The young driver driving the car shook his hands violently, the body leaned slightly, and the whole person quickly straightened the steering wheel.

"217.2 kilograms per mu?" Lin Wan and Liu Wei said in unison, their eyes fixed on Yu Hua, their eyes filled with disbelief.

Shocked!

Deep inside the shock!
217.2 kilograms, this data almost occupies everyone's brain, Liu Wei, Lin Wan and the young driver all understand what this data means.

The yield of corn per mu is 434.4 catties!
What is the yield of Chinese corn per mu?
About 170 pounds.

"Yes, this article is from Monsanto, the author's name is Shelf Buno, a company that produces saccharin, but is also doing research in the field of breeding."

Yu Hua nodded. He had read this article seriously, but he didn't care. At that time, he mainly focused on mathematical problems, and he covered the field of food crop breeding: "I think, since corn can be cultivated with high yield through the hybrid experiment method. Corn, then, wheat can also cultivate high-yield wheat through this method, select excellent wheat from different regions for hybridization, and continue to cultivate from generation to generation, and we will be able to produce high-yield wheat with a yield of more than 300 kilograms per mu. We will never be able to solve it by relying on God to eat. The food crisis must rely on the power of science."

If you can stand on the shoulders of giants, you will never squat in a well. This set of theoretical foundations for crop breeding came from the later Yuan Lao, and Yu Hua did not hesitate to tell Lin Wan directly through this obscure method.

The mainstream method of modern crop breeding is hybridization. Many people in later generations said that hybrid rice is not good, tastes bad, and is not as good as Thai rice. To tell the truth, it is purely Yuan Lao who made these people too full.

In this era, all the taste and so on are put to the back, and the crops increase the yield, which is the most important.

"Student Yu, can you really achieve 300 kilograms of high-yield wheat? Although I don't farm much, I know the concept of [-] kilograms per mu." Liu Wei was still a little unacceptable. He felt that something in his heart seemed to be broken. It's gone. In the past, when talking about crop yield, the maximum wheat was [-] to [-] kilograms, which is equivalent to about [-] kilograms. Yu Hua directly came with a wheat yield of [-] kilograms per mu.

God, he can't stand the careful liver that has been tempered by the Long March.

Which red cadre can withstand such a test?

The output of 300 kilograms of wheat per mu is a test of the imagination of cadres!

Lin Wan's eyes were fixed on Yu Hua, and the meaning in her eyes was self-evident.

"I can't guarantee it, I can only say roughly. However, I'm not going to do breeding research. Jin Yu, if you have an idea, you can convene a group of classmates to engage in hybrid breeding research. You can pass... Wait, stop." Yu Hua's eyes He showed confidence, but he didn't say enough. Although there are super wheat with a yield of 600 kg per mu in later generations, but before the high-yield wheat with a yield of 300 kg per mu is produced, he must speak carefully. Suddenly, the sharp-eyed Yu Hua suddenly found something and quickly spoke up. shouted.

"Squeak!" A sharp braking sound came out, and in a flash, the Buick car, which was traveling at a speed of more than [-] kilometers per hour, quickly stopped and leaned on the side of the road.

Yu Hua opened the car door, ignoring Lin Wan and Liu Wei, and went straight to the wheat field in front of him. His eyes were fixed on the front. An extraordinarily tall and sturdy wheat plant stood amidst countless golden oceans, and looked extraordinarily conspicuous.

Seeing Yu Hua running into the wheat field, Liu Wei and Lin Wan seemed to realize something, and their eyes hurriedly aimed at the wheat field.

"Interesting, so coincidental." The itching sensation of the wheat awns piercing the skin came out. Yu Hua didn't care about the itching hands, and quickly came to the target, looking at this wheat plant full of wheat grains, his eyes were full of joy.

coincidence.

What a coincidence.

This is to say Cao Cao, Cao Cao is here.

(End of this chapter)