"Popular science?" Cui Shi scratched his head and looked at Li Feng blankly.

Li Feng explained: "It's just to talk to you about crossbreeding. ”

Cui Shi's eyes suddenly lit up, and he said excitedly: "I see! ”

"Lord, why have I tried so many times, but I have not succeeded once? I've been nurturing them very carefully! ”

The corners of Li Feng's eyes twitched, and he sighed: "Do you remember what I said to you when you were cross-bred?" ”

Cui Shi was puzzled: "Remember, you said that if you use similar grain plants with high quality and high yield to cultivate, you may be able to get grain plants with both high yield and high quality." ”

Li Feng asked rhetorically, "So did you do it like this?" ”

"Yes......" Cui Shi said with certainty, but looking at Li Feng's eyes, his tone became lower and lower.

Cui Shi pondered for a while, and suddenly a drop of sweat oozed from his forehead, and he slapped his hands violently and said, "I understand!" It's close! ”

"When I crossed and bred, I just followed their characteristics, and I didn't even think about whether they were similar or not!"

"But why can't different plants be cross-bred?"

Cui Shi looked at Li Feng with some puzzlement.

Li Feng nodded first, and then fell silent, how can I explain the so-called reproductive isolation to you?

After thinking about it, Li Feng decided to explain it with a fixed pattern that has been handed down from ancient times to the present.

Rhetorical question: "Have you noticed that those experienced old farmers all plant good seeds of the same crop together, and inferior seeds together, but have you ever seen a deliberate distinction between high-quality seeds and low-quality seeds of different crops?" ”

"Huh? Well! Cui Shi's eyes suddenly lit up, obviously eating Li Feng's set, and he didn't continue to ask.

Li Feng breathed a sigh of relief, if he studied it deeply, how could he suffer from it.

Immediately, Li Feng said indifferently: "If you are really interested in the principles and laws in it, you may be able to try cultivating two peas that look different." ”

"For example, peas that are the same as other peas, but are different from round grains and wrinkled grains, or other identical peas, tall stems and short stems, and then use round high stems and wrinkled short stems, round high stems and wrinkled high stems...... And so on, and finally you see what the effect of cultivation is. ”

"But you can do these things slowly in the future, and the most important thing now is to cultivate high-quality and high-yield grain plants, especially our staple food."

"After getting the results, we must not only have high quality and high yield, but also resist disease and lodging, and even adapt to a harsh natural environment."

"Otherwise, if there is bad weather, such as drought, strong winds, etc., the fragile plants may be gone, and eventually the grain yield will be greatly reduced."

Cui Shi listened to Li Feng's teachings, his eyes became brighter and brighter, can agriculture still be played like this?

In their time, all the basis was the knowledge passed down from their ancestors, as well as the experience passed down from generation to generation.

It's not that there are many things, it's just that everyone has become accustomed to it, and they don't feel anything special, let alone deliberately pursue what the principle is and why it happens.

Because this is the inheritance and experience, how and why.

However, Li Feng's words are equivalent to tearing this layer to shreds, delving into the principles and whys, and then summarizing and experimenting, and finally drawing conclusions.

Such a concept, while shattering Cui Shi's inherent concept, also re-establishes a new scientific concept of seeking truth from facts and practicing inquiry.

Coupled with the large number of ancestral methods and countless "ordinary" experiences inherited by Cui Shi, even Li Feng was far from predicting what fruitful results would be able to bear fruit in the end.

After discussing the "pea hybridization experiment", Li Feng returned the topic to the cultivation of staple food grain plants.

First, he said the conclusion that different species have no future, and then summarized the differences and similarities between wild rice and planted rice.

It's just that Li Feng had swiped a video of distinguishing between these two kinds of rice when he was bored before, otherwise he really couldn't tell it now, so Cui Shi had to spend a lot of time looking for a large number of wild plants similar to planted rice for cultivation, and finally screened out the real wild rice.

Now there is no need, although it is still possible to choose the wrong one, but the probability of choosing the right one has been greatly improved, and a lot of work has been reduced in an instant.

Cui Shi was fascinated by what he heard, and he took out a small notebook and kept writing down important contents, which made Li Feng feel a little ashamed inexplicably.

I'm just a half-ass, and I only know better than you things that were high-end in your time, but almost rotten in our time.

If you really talk about agricultural planting and cultivation, I will be directly hung by you!

It's like an expert listening to a lecture from a primary school student and taking notes seriously, and that feeling is simply bursting!

In the end, Li Feng left with smoke in his throat, really-his body has been hollowed out!

All the things related to agriculture in his mind have been told to Cui Shi, and what kind of fruit can be produced in the end depends on how far Cui Shi can go.

After reading Cui Shi's side, Li Feng went to Tian Hua by the way.

When he learned that they were racking their brains to think about how to build a ploughland planter and harvester, Li Feng expressed strong support, but theoretically said that there was nothing they could do, and they had to figure it out slowly on their own.

He is not omnipotent, in the era of the information explosion, he must know many well-known things, but the machine, you haven't disassembled and assembled it in depth, and you don't know what exactly is inside.

So let the professionals in this group of territories study these things on their own.

Returning to the completed construction of the City Lord's Mansion, now Fenglin Village is only left with the three major parts of the Punishment Mansion, the Shangli Hall and the City Wall from being promoted to Fenglin Town, as long as these are completed, all the conditions for promotion to the township will be completed.

As for the newly built City Lord's Mansion, Li Feng was very satisfied.

Spacious, atmospheric, with back garden!

Aside from being a bit deserted, there are no other drawbacks.

After taking a sip of water at home to moisten his throat, he went to the main hall to take some of the affairs handed back to the study, ready to see if there were any interesting things in the territory lately.

In the study room of the City Lord's Mansion, it is said to be a study, but in fact, there are few books, and the bookshelves are not filled with a few grids, and the key is that most of them are newly written.

These are Li Feng's requirements for many high-end talents in the territory, how can you be a character of your level if you don't publish a book.

If you don't write a book, it will be a huge loss for the entire territory!

And publishing a book is not beneficial to the territory alone, it is also for you to pretend to be forced!

Think about it, when the territory is getting bigger and bigger in the future, there are more and more people, and there are more and more talents, and then the education will be established, these books will all be textbooks, and all the liberal arts and sciences will be moved.

If everyone brags to those outstanding juniors who have not yet published books, and boasts that their books are already the textbooks of the territory, won't this force come up!

For the sake of the top talents in this territory, Li Feng was heartbroken, and even prepared the materials for their future pretense in advance.