"Uncle, you seal this well, so that the water in it will not dry up so quickly, and there will be water infiltrated and stored in the well every day."

In Fengxian County, Chen Nuo and others helped dig a well, and the water output was not large, but it was enough to meet the living needs of more than a dozen surrounding families.

In order to reduce the drying up of water evaporation and to avoid contamination of the well water, Chen Nuo is teaching people here how to build pressure wells.

"Datang National Master, this well is sealed, how do you get water?"

The surrounding farmers saw that Chen Nuo had placed a large bamboo tube in the well, and then sealed the mouth of the well with stone slabs and layers of mud, and asked curiously.

There is a bamboo tube, but it is impossible for the water to flow out.

"With pressure!"

Chen Nuo used the wire to wrap the bamboo tube around a few times to fix and tie it tightly to avoid cracking of the bamboo tube, took out a small bamboo tube nesting doll and stuffed it into the big bamboo tube, and took a one-way piston made of cork plug and animal skin and stuffed it into the bamboo tube, and placed a big stone next to the bamboo tube to make a simple lever handle, and a simple pressure well was ready.

Pressure wells, a very common type of wells in rural areas, use atmospheric pressure for water pumping principles.

There is a one-way piston above the pressure well, and there is also a one-way method at the bottom of the bottom of the well, when the piston is lifted up by pressing the lever, the air of the big bamboo tube in the well is pumped up.

The piston goes down, the one-way valve at the bottom of the well closes, and air leaks from the piston.

In this way, the large bamboo tube is gradually pumped into a vacuum, and the water at the bottom of the well is pumped up under the action of atmospheric pressure.

After checking the tightness, Chen Nuo poured a little water on it to act as a seal, and then quickly pressed the handle up and down.

Crunchy!

The environment was arid and the well was relatively deep, so it took Chen Nuo more than a minute to get the water at the bottom of the well at the speed of an ordinary person.

Knock knock knock.

The sound of the piston changed, from a hoarse ho-ho to a coo, and water poured out of the big bamboo tube.

"Hohoo!"

For a moment, the eyes of the people around widened and they watched this scene in disbelief.

From Chen Nuo's explanation that the Well Dragon King didn't care about anything, and then to digging the well, it only took two days before and after.

In their experience, a dry well around it must be drilled very deep, and fetching water is a hard job that will tire people to death.

Unexpectedly, Chen Nuo's well was very deep, but it was not big, and the well had to be sealed.

"You guys try your strength."

Chen Nuo played for a while to get out of the way, and motioned to the surrounding farmers to come forward and try the situation.

"National teacher, I'll try!"

A middle-aged man next to him who had just helped dig a well came over, rolled up his sleeves to reveal his tanned arms, and held the handle to learn to draw water like Chen Nuo.

"Hold your hand a little back, don't hold it too forward."

Chen Nuo shouted and motioned to hold his hand, which would save more effort.

"Yes."

The middle-aged man took a deep breath, held his hands behind his back and began to press down.

Well?

This pressure, he immediately felt that something was wrong, very light, not to mention him, he could press it to a six or seven-year-old child.

Crunch! Crunch!

Knock knock!

A large amount of clear water gushed out from the gap in the big bamboo tube, and the eyes of the people around him lit up, and their expressions were almost irrepressibly excited.

"Dog, come and try!"

After experimenting for a while, the middle-aged farmer called out to his son, an eight-year-old child.

"Dad, what am I going to do?"

Children in the countryside, whose life is hard, have long been sensible.

Dogan walked over and looked at the water on the ground, pursed his dry lips, and asked what to do.

"Hold here, hold it a little back according to the words of the national teacher, this hand will play, be careful not to hit the chin."

The middle-aged farmer instructed his son how to press the water, and the dog was very clever, and soon understood what to do, and held the handle and pressed it down.

Goo-dong.

A stream of water gushed out from the well, reflecting the child's stunned and curious eyes.

"How's that, will it be heavy?"

"It's light!"

Goudan's eyes looked at the simple pressurized water well curiously, and said in surprise: "Dad, in the future, I can get up in the morning to fetch water, and you don't have to run a few miles to fetch water." ”

"Good boy, let's go play first."

The middle-aged farmer touched the dog's head and signaled to play first, when someone next to him was already cheering and running home to carry a bucket to fill the water.

"National teacher, we can dig a few more wells to meet the needs of life, I want to ask the national teacher how to solve the lack of water in the crops?"

"You still have mountain spring water here, and you can bring spring water for irrigation."

Chen Nuo pointed to a canyon behind Fengxian County, the surface was arid, but there was water in the canyon.

"National teacher, there is water in the mountain spring, but that's a drop in the bucket."

The Fengxian Shangguan County Lord not far away shouted anxiously.

If the problem of drinking water is solved, irrigation does not solve the problem of grain and no harvest, then everyone will still starve to death.

Chen Nuo didn't explain, took a bamboo cup next to him, filled a cup of water and splashed it on the slate not far away, the water was splashed very open, the weather was hot, but the slate dried up in two minutes.

"Where's the water?"

Chen Nuo asked.

"This is well water, which was taken away by the King of the Well Dragon."

"Infiltrated into the ground!"

"How does the slate penetrate, this is flying into the sky!"

There was a lot of talk around the people.

"Then look at the current cup."

Chen Nuo filled another glass of water and poured it on the groove of the stone slab, and waited for five minutes, and most of the water was still there.

"It's all the same amount of water, why didn't the water dry up so quickly this time?"

"This!"

The people around were stunned, the two splashes of water and the drying up of water demonstrated by Chen Nuo are very common in life, but no one has ever thought about why, what is the essence and mystery behind the research.

"Area? National teacher, is it an area! ”

A young man who was no more than twenty years old but had tanned skin shouted: "The first time you splashed water, the water was very boiling, and the water dried quickly, and the second time you splashed water, the water was poured in one place, and the water dried more slowly."

There should also be the sun, and the water in the summer dries faster than the water in the winter, and the water in the sun dries faster than the water in the shade of the trees. ”

Clever, full marks for observation!

Chen Nuo nodded and said with a smile: "That's right, the disappearance of water is related to the area and the sun, so as long as you find a way to reduce the watering area, the same water will naturally be able to water more crops." ”

Less watering area and more crops...... National teacher, there seems to be something wrong with your logic.

The people in the surrounding Fengxian County were stunned, and they wanted to say it but didn't dare to say it.

"Chen Nuo, are you dizzy?"

Behind Chen Nuo, the monkeys didn't react, but they didn't dare to say it, but instead looked at him with a strange expression.

Reducing the area of watering, this should not be watering fewer crops, how can it become more watering.

Chen Nuo shook his head and explained, "Do you have gaps in your crops?

If you try to water only the roots of the crop and not the rest of the crop, you can do more with the same water.

And because there is no water in the field, the weeds in the field will not grow, and the end of the grain production will be higher. ”

Only water the roots of the crops, not elsewhere?

The people of Fengxian County suddenly realized, and then shook their heads with a wry smile: "National teacher, it's not that we refuse to water like this, it's really that everyone can't support such a crop by watering like this every day." ”

"That's right, there are tens of thousands of crops in the fields, and everyone is busy from morning to night."

The surrounding farmers talked a lot, and they all understood the truth of watering only the roots, but no one could withstand the amount of labor.

"You don't need to carry water to water them one by one."

Chen Nuo took two long thin bamboos, cut a hole in them with his fingers at random intervals of dozens of centimeters, and then put the bamboo at an angle, picked up a glass of water and poured it lightly.

The surface tension of the liquid causes the water to flow down the bamboo, and when it encounters a cut opening, the surface tension is broken and the water drips.

Most of the water continued to flow forward, and then it dripped down again when it came across the next opening.

After two openings, the water continued to move forward, dripping down with each opening, and finally there was hardly much water at the end of the bamboo.

"Go and cut these thin bamboos, and cut a small hole in them, and stretch them from the ridge into the field, and each opening corresponds to the position of a crop."

Chen Nuo demonstrated it with his hand, reached out and took a wrist-thick bamboo, and used a knife to make a random opening on it and then inserted the bamboo into it.

"Put a thick bamboo like this horizontally at the ridge, dig through the bamboo, and insert these thin bamboos into the bamboo pipe, and then build a pond on the ridge.

So you only need to pick up a few loads of water every day and pour it into the pool, and the water flows from the pool into the thick bamboo pipes, and then drip through the thin bamboo to the roots of the crops.

Or you don't need to carry water, use a bamboo pipe to directly introduce the water into the pool and lead it to the bamboo pipe on the ridge, which is equivalent to watering the experts day and night. ”

Chen Nuo demonstrated a rudimentary drip irrigation system in just a few words, and the eyes of the farmers in the surrounding Fengxian County went from confused to bright, and finally erupted in astonishing ecstasy.

Such a watering system only requires one labor, and then only needs to weed the experts regularly, and there is no need for tiring watering and irrigation.

A few experienced farmers quickly thought about it in their minds, and realized that this kind of watering, which used to be only able to water one acre of land, can now water more than two acres of land.

In addition, it is true that as Chen Nuo said, such a watering method makes it difficult for wild grasses in the field to grow without water, and in the end the grain must be high.

Even some farmers who are more flexible have already thought that through this kind of watering, they can flush urine, grass and ashes, etc., and then fertilize the crops more accurately.

"National Teacher Talent!"

"Thank you, National Teacher!"

The people around thanked one after another, and a few people who were in a hurry had rushed home to get knives and go up the mountain to cut fine bamboo.

There are a lot of fine bamboos, but who knows if they are enough to use, although the bamboo is not enough, you can also use other vines, branches, etc. instead, but since the national teacher said to use bamboo, it must be that the effect of bamboo is better.

"Thank you, the national teacher, you have saved the people of our entire Fengxian County!"

The surrounding farmers and people were busy, and the lord of Fengxian County stepped forward to thank him deeply.

"Lord Shangguan is polite, in fact, this knowledge is hidden in daily life, hidden in the nature of heaven and earth, as long as we study carefully, we can naturally discover the mysteries."

"Shangguan understands that this is like your steam locomotive from the national teacher, ask the national teacher, we want to learn relevant skills, where can we go to learn the arts."

The county lord of Shangguan thanked him again, and then asked Chen Nuo about his studies.

Teaching people to fish and giving people to fish is the truth, he understands it very well, knowing that Chen Nuo can't stay for a long time, so he knows where to learn such a skill, and there will be no risk of disaster in Fengxian County for a hundred years in the future.

"I'm going to be here for a while, and I'll be teaching you as many skills as I can during this time, and I'll be ...... later."

Bang!

Before Chen Nuo's words were finished, his heart suddenly sensed a tremor of heaven and earth, in the east, the golden light was shining, and a soothing breath was radiating from the impact.

Chen Nuo, Monkey, Jiang Liu'er, Little Fox, and even the Shangguan County Lord of Fengxian County all felt a burst of relief, but only Xuan Ming and Bajie felt a burst of depression.

"It's ......"

Xuan Ming's eyes widened, this kind of aura had not been felt in the Earth Immortal Realm since ancient times.

"The anger of the human emperor!"

Bajie swallowed his saliva, and was frantically scolding Haotian in his heart who was already dead and couldn't die anymore.

The spirit of the human emperor reappeared to suppress the luck of the human race, and he was originally a fairy god from a human race, but he was coerced and lured to be a pig demon.

Originally, the promise to send a wife was canceled, not to mention, but now even the human race is rising again, and he can't enjoy benefits because he has become a demon body.

In a word, it is a big loss of blood, which is simply a loss to Mrs. and a soldier.

"The Terrans are going to be unified again."

After Xuan Ming was shocked, a trace of complexity flashed in his eyes.

The demon race is about to be extinct, and the witch race is completely scattered, only the human race is still standing in the center of heaven and earth after so many ups and downs.

"I see."

Chen Nuo looked at the golden light in the east, felt the changes in heaven and earth in his heart, and understood in his heart how the human race was scattered everywhere to achieve unity as a huge heaven and earth that was almost indescribable.

It's the spirit of the human emperor.

When the Qi of the Human Emperor gathers, the effect is not only to suppress the luck of the Terran Race, weaken or even suppress the strength of the Mighty in the territory of the Terran Race, it also has a function, that is, to change the space environment.

The conquest of the army, the travel of the emperor, and even the roads of the human race are like the road to the west that has been branded and shrunk into an inch of magical powers.

It is precisely this effect that can enable ordinary people's Terran army to cross thousands of rivers and mountains, cross huge heaven and earth, and realize the unification of the Terran race in just over ten years.

Of course, it is impossible for every road that the human race has walked out to be like this, except for the army to travel, the emperor to travel, and the other official roads opened up by various countries and provinces can have such an effect of shrinking the land into inches.

"Shangguan County Lord, the war for the unification of the Terran has begun, and it won't be long before you can go to the Tang Kingdom to learn art and master the industrial technology of the exclusive Terran."

Chen Nuo turned his head and looked at the Shangguan County Lord, who was completely confused.

Originally, he planned to promote the way of science and education in Tianzhu, and let the county lord of Shangguan go to Tianzhu to study nearby, because ordinary people with no supernatural powers and no extraordinary strength, Datang came here, it was a distance that could not be crossed for eternity.

But not anymore.

The human emperor of the Tang Dynasty has gathered, and the luck of the human race has gathered again, and Chen Nuo, who understands the industrial strength of the Tang Dynasty, understands that this war of reunification will hardly take long to end.

The people of Fengxian County will wait for a while, and then they can go to Datang to learn art through the official road.

Airplanes!

Without waiting for the Shangguan County Lord of Fengxian County to react, there was no wind around, and golden light from all directions converged on Chen Nuo's body, and an inexplicable aura emanated from him, and the whole person seemed to turn into a lighthouse shining with signals.

Airplanes! Airplanes!

The human emperor qi that shrouded the heavens and the earth in the east seemed to sense something, and a condensed golden light flickered, and the message came to Chen Nuo.

Rumble!

The golden light exploded and turned into a text.

"The people of the world welcome the national teacher back to the dynasty! Congratulations to my Terran! ”