"Like the civil and military forces of the Manchu Dynasty, almost all of my knowledge of Jiangnan comes from hearsay!" When Li Shimin said this, he suddenly said: "I heard that your kid started to study the world at the age of fourteen, but is there such a thing?" ”

Luo Tong's face did not change and said: "It is true!" Played in Gangnam for half a year! ”

He is restless and bold! When he was fourteen years old, he successfully fooled Mrs. Luo with reasons such as "reading thousands of books and traveling thousands of miles", "not as good grass grows under the big tree" and "flowers in the greenhouse", so he took Luo Shixin's former personal guard Luo Can to play around, and at the age of fifteen, he began to work alone.

At the beginning, in addition to increasing his knowledge, he also wanted to deal with today's problems, he had too much "foresight", if there was no "experience" match, how could he justify himself! There is no monitoring in this era, and he is just a small person, as long as he leaves the sight of his family, the ghost will pay attention to him! When he returned home, it was not up to him to decide where he went?

Li Shimin was overjoyed and said: "I want to hear, what is the wonder of this Jiangnan?" ”

"The south of the Yangtze River is bordered by the sea and the river, and the lakes in the territory are vertical and horizontal, so that the products are abundant, and it is not an exaggeration to call it the land of fish and rice!"

"It's not bad at all, is it?"

When Li Shimin heard this, he asked, but in his heart he was still biased towards Guanzhong.

Guanzhong, since ancient times, has been a prosperous place, from the original ancestors Xuanyuan Yellow Emperor and Shennong Yan Emperor, has always occupied an extraordinary position in the general trend of the world.

Qin was rich because of Guanzhong, Han was strong because of Guanzhong, and Tang was also prosperous because of Guanzhong.

In the "Historical Records * Liuhou Family", Sima Qian recorded such a sentence "Fuguanzhong left the food letter, right Longshu, fertile field thousands of miles" Guanzhong is known as the golden city of thousands of miles, the country of abundance. The Guanzhong area is not only the earliest place called "Tianfu" in history, but also the first place in history to be called "the land of abundance", and it is also the first imperial capital in China's 5,000-year history. It can be seen that in the eyes of the world, Guanzhong is a rare feng shui treasure in the world, unique. It is said that the remote Jiangnan can be compared with Guanzhong, and few people believe it.

Only Luo Tong, a later generation, can say such things, and only Li Shimin, a Ming Jun, can accept Luo Tong's unbelievable thoughts.

"This is true!" Luo Tong also does not deny that Guanzhong is on the verge of Weishui, and Weishui is the source of the Yellow River, and there are eight rivers near the city of Chang'an alone, commonly known as "eight rivers around Chang'an". In terms of the abundance of water resources, the Guanzhong Plain is not much inferior to the south of the Yangtze River, but ......

"But...... Climate and precipitation are by no means comparable. Your Majesty may not know, but the climate and precipitation of a place are closely related to the growth of local crops. If the temperature is high, it is not suitable for the growth of grain, and if the temperature is low, it is not suitable for the growth of grain; The same is true when there is more water, and the same is true when there is less waterfall. This is also the key reason why when all localities hand over grain, there is more or less. Therefore, generally speaking, whether the grain harvest is good or not depends on God. ”

Li Shimin doesn't know much about this knowledge.

He was born in a family, his father was a national prince, and he lived a life of fine clothes and food since he was a child, but he did not know much about the knowledge of the farmland. He knew that the grain harvest was related to rain, but he didn't know that more rain would also affect the harvest, and he had never heard of the climate temperature.

Luo Channel: "The climate in Jiangnan is very unique, the climate is warm and humid, and the four seasons are distinct, which is a very suitable place for the growth of various crops and human survival. This point is far from comparable. There is also Gangnam, which is a place where there is a lot of rain but not much heavy rain. Although there are changes in the specific climate, the characteristics of the mild climate and abundant rainfall generally do not change much. Compared with the heavy rain that often occurs in July, August and September in our Guanzhong and Central Plains, is it more than a cut over? ”

He originally wanted to say that Jiangnan is in a region of transition from the tropical zone to the warm temperate zone, with high temperatures and abundant precipitation, but he felt that the knowledge of later generations in these words was too strong, and he couldn't understand Li Shimin and Fang Du, so he temporarily changed his words and said something simple and easy to understand.

Li Shimin was silent for a moment and said, "What you said seems to be understood or not, and it is also a bit unbelievable. But when you think about it, there seems to be some basis. The north is either drought or flooding, but there are few floods in the south of the Yangtze River, and that is because the dams along the Yangtze River have collapsed, which has not affected the hinterland. And drought and locust plagues have never been seen before. ”

"The fact that there are no floods and droughts in the south of the Yangtze River is the credit of the rivers and lakes that crisscross the Yangtze River! It seems that someone's child has said the word 'one eliminates the other'! Do you know this kid? ”

Li Shimin, Fang Xuanling, and Du Ruhui, who were listening to it, made him stunned when he asked, and he didn't know what he was doing.

Princess Changle smiled "poof": "'This eliminates the other' from "Mencius-Gongsun Chouxia" 'At that time, this time is also. In 500 years, there will be kings who will rise, and in the meantime, there will be famous people who will evolve! ”

She was so engrossed that she had already stopped writing and listened quietly on the side! When Luo Tong said Mencius as "whose child", he couldn't help but explain.

Li Shimin, Fang Xuanling, and Du Ruhui understood at this time, and couldn't help laughing! The atmosphere suddenly came alive.

"If you don't learn, you can't learn" Li Shimin scolded with a smile and said, "You should have been allowed to enter the Hongwen Pavilion to learn the Four Books and Five Classics." Alas, it's all my fault! ”

Luo Tong sneered: "Hongwenguan learned what I said? Can the four books and five classics make the people rich and the country strong? Or can the people be fed and clothed? ”

"This ......" Li Shimin, Fang Xuanling, Du Ruhui, and Princess Changle asked him to stop!

"Food, clothing, housing and transportation are the major events in life! Only when you are well fed and clothed and have a rich life can you have the heart to dance and write! Datang Education has a serious problem, I'll talk to you about it another day! Let's continue with the topic just now! ”

Everyone smiled bitterly!

His thoughts couldn't keep up with Luo Tong's rhythm, but Li Shimin and Fang Du took the three questions just now to heart.

"In the dry season, the water level of the Yangtze River drops, and the rivers and lakes flow into the Yangtze River; In the season of abundant water, the waterlogging of the Yangtze River will pour into the lake! The Yangtze River and the rivers and lakes along the river breathe in and out, and the cycle repeats itself over and over again! Unless it rains heavily, the Yangtze River basin, with its Dongting and Poyang lakes, will not be flooded at all. The water system in the south of the Yangtze River is well-developed, and it is a luxury to want to taste the drought. ”

"Smack!" Li Shimin slapped his thigh heavily, showing an ecstatic expression, and he was excited! glanced at Fang Du, and saw the word "fanatic" in the other party's eyes!

"In this way, the reason why the Yellow River is flooded is because of the lack of lake regulation, and once the Yellow River has too much water and nowhere to bloom, it will lead to flooding! And the drought is also caused by the fact that there is no lake in the Yellow River to release water? ”

"The causes of floods and droughts are very simple!"

Luo Tong said something unintentionally, but Li Shimin, Fang Xuanling, and Du Ruhui listened with straight eyes.

It's so hurtful, it's so hurtful!

But when I saw Luo Tong's puzzled appearance, I found that Luo Tong, who had hurt himself so deeply, didn't even know that he had stabbed them to pieces.

"......" Li Shimin completely lost his temper. He said weakly: "Your so-called simplicity has made this nation difficult for a thousand years!" ”

Fang Xuanling and Du Ruhui nodded one after another!

"That's their stupidity! The Yangtze River and the Yellow River are two well-known mother rivers, one is either a flood or a drought, and the other has been stable for thousands of years! Connect them and all the questions come out! ”

Everyone was deeply moved to claim the title of "fool".

As Luo Tong said, they really didn't connect the two, and they never thought that the secret to solving the Yellow River floods was on the Yangtze River.

Today, the famous Ming Jun and the two virtuous ministers have become a student of Luo Tong, and they scolded him so much! I'm so excited.

Suddenly, the red-faced three people found that they were really cheap!

"Locust ......" Ming Jun Xianxiang has not yet digested it, and the knowledge thrown by Luo Tong is messy.

"The locust is a warm, dry locust that prefers dry land, and the arid land has many benefits for their reproduction, growth, development and survival...... In short, the drought is the end of the locust! Luo Tong couldn't find a word that was not the future to explain for a while, and said very irresponsibly, "You know!" ”

Everyone looked at each other! It's full of black lines, don't you understand?

"Since there are locusts in the drought, then if there is no drought, there will be no locusts! Jiangnan is rainy and the soil is moist, and that place is not suitable for locusts! That's it! ”

"How to deal with the locust plague?" Li Shimin asked.

When he asked, Luo Tong asked rhetorically: "Your Majesty, have you ever eaten locusts?" ”

Luo Tong remembered that in the history books, it was recorded that in the second year of Zhenguan, Li Shimin swallowed locusts.

"Can you eat that? If you eat it, you won't die? Li Shimin's face turned green.

"Locusts feed on crops, so why can't they eat them?" Luo Tong looked back on the taste: "Put it in the oil pan and fry it, put some salt, it's fragrant, crispy, and delicious in the world!" ”

The four of them were surprised and amused when they saw Luo Tong swallowing his saliva wildly and revealing his greed.

"If I have the chance, I'll cook it myself and treat you to a locust feast."

"I don't eat it!" Princess Changle shook her head again and again!

"If you don't eat, you won't eat!" Luo Channel: "In fact, in addition to eating, there is also fire, put a fire at night, locusts will kill themselves when they see the light!" Moths fight fires, and so do locusts. ”

The four of them nodded for a while, this method is reliable!

"And then there's poultry! As long as a large number of chickens and ducks are fed, the locusts will be eaten clean before they cause harm, and even the chickens and ducks will be driven to the fields, just like grazing, so that they can catch locusts and forage for food. ”

"Chickens, ducks." Li Shimin's eyes suddenly lit up.

Luo Tong praised: "Your Majesty's description is very appropriate, the people have saved the food they are fed, and they have eliminated the locusts, this method can be described as killing two birds with one stone." ”

"Chickens and ducks can wipe out the locust plague?" Fang Xuanling said with some disbelief, from his long life, every locust plague was a desperate struggle.

"Of course one or two chickens and ducks can't be, but what if it's thousands, tens of thousands? In order to prevent locust plagues, His Majesty encouraged the people of Guanzhong to raise a large number of chickens and ducks. Almost no-burn feeding. Chicken and duck are delicious and a rare delicacy. People can sell it for money, or they can eat it themselves, and with meat, people's health will be better! Why not? ”

"Hmmm! That's it! Li Shimin nodded and asked Fang Du to arrange it tomorrow.

Luo Tong took a look at the sky! smiled strangely, and then asked Li Shimin to order the imperial chef to slaughter ten roosters and bury them in the snow in various places in the imperial garden.

Li Shimin didn't understand what he meant, but he knew that Luo Tong's affairs had deep meanings, and he didn't doubt him, so he arranged it.

"The results of floods, droughts, and locust plagues have been solved, and now we can get back to business! Alas, it goes too far off topic. Don't do business, don't do business. Luo Tong stretched.

Everyone laughs!

It's really off-topic, there's no way, everything Luo Tong said about it makes everyone drink like a good wine, can't stop, and opens their eyes.

The development of Jiangnan is important, but who dares to say that the control of floods, droughts, and locust plagues is not important?

After being quiet for a while, Li Shimin said: "I heard a lot of things you said, and I couldn't understand them very well!" But the numbers you have come up with speak for themselves. Jiangnan is sparsely populated, and the total amount of grain taxes paid each year cannot go up, but the per capita decline is shocking. This amazing achievement is no accident, as you said, it is caused by the unique factors such as climate, soil, and rain in the south of the Yangtze River. I also have reason to believe that once the development of Jiangnan is completed, the grain output will surpass that of all parts of the world. ”

Luo Daodao: "This is certain, most of the land in the south of the Yangtze River, whether it is the fields that have been excavated or the land that has not been excavated, has unique conditions. Because of the climate, their rice maturates very quickly, and often has two or even three harvests in a year. Therefore, I have always believed that in order to solve the food problem, it is necessary to develop agriculture in Jiangnan. ”

Li Shimin said movingly: "Is this true? ”

At present, rice cultivation is still mainly based on one-season rice, and even if there is time, the people do not have the courage to try, but only use the fields to plant some vegetables intermittently, and do not repeat the rice planting. So two seasons a year is unheard of in this day and age.

"This can be guaranteed!" Three seasons a year requires some research, but with the climate in the south of the Yangtze River, two crops of rice a year is a normal thing.

"Assuming that's the case, this Jiangnan, I really have to develop it. As long as there is food, why can't I fight the world"

Li Shimin is full of pride, and whatever development Jiangnan is a floating cloud in his eyes, what he really thinks about is how to become the lord of the world and how to conquer the countries on the earth that are not subject to the control of the Tang Dynasty.