Chapter 674 Waterproof Materials and Fertilizers

The wall on the side of the cliff, a hundred meters away from the cliff.

Although the distance in the middle is only a hundred meters, there are still some trees. However, due to natural disasters, most of the trees above are dead. Only a row of relatively strong trees remained.

The afternoon sun brings warmth.

The breeze blew slowly, blowing off the pine needles on the pine trees and falling rustlingly.

These strong pine trees have withstood the severe cold and heat and have penetrated their roots deep into the ground.

At noon, the temperature reaches ten degrees, making people feel like winter is over.

The temperature of the sun shines on people's bodies, and the breeze is not dry, making people feel very comfortable.

Song Qi and Shang Xueer on the wall saw Li Yu and the others getting off the car, waved their hands, and shouted to Li Yu and the others: "Mr. Li, what are you going to do?"

Li Yu covered the sun with his hands, raised his head and saw the two people on the wall, and said: "Repair the sewer, you guys watch from above, if you find zombies, let us know."

"Okay, then you should pay attention to safety!" Shang Xueer shouted.

Li Yu waved and said he understood.

Then Lao Xie and others walked towards the cliff carrying ropes on their backs.

Due to the trees in front of them, the pickup truck couldn't reach the cliff directly, so they had to walk a short distance further.

Several people carried guns and spears on their backs, passed through the row of pine trees, and soon reached the edge of the cliff.

Lao Xie stood carefully on the edge of the cliff, assessed the position, and then lowered the rope.

Wang Cheng pulled the rope and tied it to a huge rock six or seven meters away from the cliff.

The rope dropped.

Li Yu took out his walkie-talkie and said to the two people in the sewer: "Lao Lu, the rope is lowered, have you seen it?"

Lao Lu stuck to the iron railing and saw the rope hanging down three meters away. He used the intercom to report back: "Pull it another three meters to the right. The current position is wrong and we can't reach it!"

When Li Yu heard this, he said to Lao Xie: "Pull three meters to the right, but you didn't aim at the position below."

"Okay." Lao Xie pulled the rope over.

"Yes, yes, stop." Lao Lu below saw the rope floating past the iron railing and quickly reached out to pull the rope.

Li Yu quickly asked Lao Xie to stop.

Lao Lu took the rope and tied it tightly to the iron railing.

Then he stepped back and said to Xu Zhen: "Okay, Lao Xu, just cut off this iron railing and they can pull it up."

Xu Zhen took the cutting machine, stepped forward, and started cutting.

beep beep——

The cutting sound is sharp and resounding.

Lao Xie heard the sound of cutting from above, and immediately let go of the rope to prevent the iron railing from being cut down later, and the gravity fall taking him down with him.

Xu Zhen cut for ten minutes and finally cut off the welded steel plates on both sides of the iron railing.

But he held on to the iron railing and it did not fall down.

He turned to Lao Lu and said, "Lao Lu, remind them that we have cut the iron railings and let them be ready to respond on top!"

Lao Lu immediately took out his walkie-talkie.

After receiving their news, Lao Xie and Wang Cheng stood beside the boulder.

"Okay. Push it down." Li Yu contacted the two people below through the intercom.

Immediately, Xu Zhen pushed the iron railing outward hard.

bang!

The iron railing fell down the cliff, but soon the rope was tied and the rope pulled the iron railing.

Hit the cliff.

Lao Xie and the others on the cliff saw that the rope was quickly tightened, so they walked over slowly.

Four or five people held the rope and pulled it up hard.

The iron railing is still a bit heavy, but fortunately it is not high, otherwise it would be troublesome to pull it up.

A few minutes later, Li Yu looked at the row of pine trees behind him and said, "Let's cut off all those pine trees later and drive the car over, otherwise it will be too laborious. Xiaohang and the others will do it later." The newly completed iron railings are estimated to be heavier, and we cannot pull them alone."

Lao Xie wiped off his sweat, nodded vigorously and said, "Sure, there is a chainsaw in the car, and I will saw it now."

Lao Xie called two people and walked towards the pickup truck.

Only a few dozen meters to the left and right, Li Yu and the others were sitting on the boulder, smoking cigarettes, watching Lao Xie and the others drive the car under the pine trees, and sawed off the few pine trees in the middle.

As the few pine trees in the middle were sawed off, the field of vision became much wider.

Lao Xie and the other two drove the car over.

When they drove over, everyone worked together to carry the iron railings onto the car.

Immediately, several people used the same method to lift up the iron railings of the other drainage outlets.

Lao Lu and Xu Zhen in the sewer asked the people in the city to move down the cleaning equipment, and then began to clean up the silt and garbage in the sewer.

Xu Zhen climbed up from the sewer and gave Li Hang the photos and videos she had just taken. She also gave Li Hang the details of the measured dimensions of the iron railings and asked Li Hang to make them according to these dimensions.

When Xu Zhen and the others climbed up from the sewer, Li Yu and the others also drove a pickup truck back to the inner city from outside the fence.

After receiving Xu Zhen's size requirements and video photos, Li Hang rushed to the small factory in the second outer city without stopping.

At this time, Li Yu got out of the car and saw that Xu Zhen was the only one here, and asked, "Where are Ding Jiu and Lao Lu? Are they still down there?"

Xu Zhen nodded and said, "Yes, they are still below, using cleaning equipment to clean up the sediment and sludge below."

"Yeah, okay." Li Yu nodded slightly.

Then he turned around and said to Lao Xie behind him: "Don't waste the trees we just sawed off. Go out and pull those trees back."

Those pine trees are relatively strong, and it is very rare to survive such a cold and hot environment.

Lao Xie nodded, took the two people into the car, and drove out of the base.

In the sewer, Ding Jiu and Lao Lu were cleaning up the sediment and garbage in the sewer.

It was the first time since the outbreak of the end of the world that they cleaned up the sand inside. Ding Jiu scooped up the sand with a shovel. Sweat dripped on his arms, and he took off the mask.

The smell down there is too strong, but it’s really stuffy to wear the mask all the time, so I have to take it off to breathe a sigh of relief.

The second outer city.

Li Hang, Zhou Ran, Lao Qin and others were sitting in a group, discussing issues such as iron fences and control lines.

"If you want to put the control lines in the sewer, they will definitely be submerged in water, and the wires must be completely covered with materials. I remember some PVC-C casings that Zhu Xiao bought from the next city before. I don’t know where I put it.”

He Bing listened carefully to Li Hang's request, looked at the pictures on the iPad and said.

Under normal circumstances, some materials and equipment brought by whether they are cooperative personnel or non-staff personnel will be moved to the inner city.

After a long time, more and more things have been hoarded. Some things that are more precious in Li Yu's view are stored in the cold-proof and heat-insulated underground warehouse.

For more things, a relatively large factory was built in the inner city, and then all the things collected from outside were put into it.

In fact, the cooperators sometimes exchange things that are not on the list, and sometimes Li Yu and the others think that they may be able to use materials, and they will also exchange them for food.

Since the cooperation model was launched, this factory that stores various materials has been expanded many times.

The second uncle built the food processing factory and found an area in the factory where supplies were stored for them to use.

Zhou Ran also nodded and said:

"Well, He Bing is right. If you want to bury this line in the sewer, PVC-C casing is acceptable. And this material has many advantages.

1. Good heat resistance: PVC-C hot and cold water pipes have good heat resistance and can be used in high temperature environments. They were often used in chemical plants, oil refineries and other fields before.

2. Strong corrosion resistance: It has excellent corrosion resistance and can be used in acid, alkali, salt and other chemical environments.

3. High strength: It has high strength and can withstand large pressure and tensile force. It is suitable for occasions that bear pressure.

In addition, the material is very light and is easy and quick to transport. "

When Li Hang heard this, he got up immediately and said to everyone, "I'll go find it right away. You guys have to find a way to make a controllable iron railing. My brother said it should be stronger. At least stronger than before!"

After speaking, he ran to the inner city. On the way, he happened to meet Erjiu and Li Zhengping and others, so he briefly talked about it, and dragged them to look for PVC-C casings.

When the second uncle heard about this matter, Li Yu took it very seriously and became serious.

Immediately said: "Okay, I'll go with you, Zhengping, I'll talk to the factory later, don't produce it for now, let's go find this material together."

His nephew held an unusual position in his heart.

From the beginning when the outbreak broke out, Li Yu began to plan for the farmhouse and let them come back.

Later, with his wife and children, he returned with difficulty for thousands of miles, and was on the verge of death in Jiefang City.

If the little girl hadn't just seen Li Yu and the others outside Jiefang City, she would have died long ago.

After arriving at Dazhangshu Base, after waking up from a coma, he found that his parents were still there, his elder brother and elder sister were all there!

When he was in Jiefang City, he was on the verge of life and death and starvation; after waking up, he once suspected that he was dreaming, but the facts told him that it was true.

Since then, he has achieved 100% trust in this nephew.

Because he has seen the cruelty outside, and because he has been robbed, injured, and his relatives died with his own eyes, he knows how right it is for Li Yu to act ruthlessly.

Although in his opinion, there were many things in Xiaoyu that he couldn't understand, but he didn't ask.

He cherishes everything he has now, so he will listen to Li Yu very much.

Not only him, but basically all of Li Yu's elders did not put on airs in front of him.

At the beginning, Li Yu's grandfather and grandfather set the tone: here, Li Yu is the master!

………

Seeing how enthusiastic the second uncle was, Li Hang didn't think too much, so he ran to the warehouse with them.

Li Hang used to tinker with messy things before, and a few days ago, he and He Bing made zombie generators. He came here to search for the materials needed, so he is more familiar with this place.

Standing in front of this wide stocking factory, he thought for two seconds, and then walked towards the factory door in the middle to the right.

Crash--

He opened the shutter door, ran in, and opened a closed door.

In order to protect the various materials and equipment inside, two doors are set up.

After entering, there is a hall inside, and there are some trusses inside. Li Hang searched each truss, and there are some labels on the trusses, and the labels are the classification words of some things behind.

"Found it!" Li Hang saw a label behind a truss.

He quickly ran in, and his second uncle and others quickly followed.

After rummaging around for a while, I finally found the PVC-C casing material, which filled the 6-meter truss.

Li Hang said to his second uncle and others behind him: "That's it. Let's take it to the Second Outer City together. I'll look for other materials to use."

The second uncle and others came with a trolley, stacked these PVC-C casings, and then transported them to the Second Outer City.

At this time, in the Second Outer City, Zhou Ran and others had already constructed the styles of the iron railings and control systems according to their dimensions, and the next step was to make them.

In this factory, there are also some circuit boards and other things that can be used directly, so everyone started to make them directly.

………

In the inner city, Ding Jiu, Lao Lu and others cleaned up the sediment and garbage in the sewers.

Li Yu sat on the sewer shaft and touched the turtle that Lao Lu had brought up from the sewer.

"Old turtle, why did you run there?" Li Yu tapped the turtle shell with his middle finger.

Wugui stretched out his head and looked at Li Yu blankly.

Li Yu retracted his hand, raised his head, and said with slight emotion: "Stay well, don't run around, the storm is coming..."

The sun was shining brightly at this time, and there were no signs of heavy rain or flooding.

Because of this, many survivors relaxed their vigilance, and Li Yu knew that when the disaster struck, it would be devastating.

…

Time passed little by little.

Three or four hours later.

At this time, Lao Xie and others also brought in the big pine trees on the edge of the cliff with trucks.

The diameter of ordinary pine trees is only more than 20 centimeters. The diameter of these pine trees is 45 centimeters and they have been growing for at least 70 years.

Li Yu hugged the big turtle and carried it to the residential area.

Such an old Chinese tortoise with a diameter of 50 centimeters and a weight of several dozen kilograms must have lived for at least several decades.

This thing is good for supporting the family.

The residential area also has walls, but the walls in the residential area are not high. Li Yu put the tortoise down at the door of the villa and let it choose a place to stay.

"Mr. Li, our place has been cleaned up, and the wiring system and iron railings can be installed at any time." Xu Zhen's voice came from the intercom.

"Okay!" Li Yu immediately picked up the walkie-talkie and responded.

The other side.

Lao Zhou was wearing a welding helmet and using carbon steel electrodes to weld the iron railings.

The plug-in board that controls the circuit is fully enclosed with waterproof materials, and the entire circuit is covered with waterproof and heat-resistant materials.

In addition, the circuit lines are externally wrapped with PVC-C sleeves to protect the circuits inside.

At this time, Li Yu's voice came from the intercom: "Xiaohang, how is the progress over there? Lao Lu and the others have finished the installation and can install it at any time."

Li Hang looked at Lao Qin, who pointed at an iron railing and casing that had been made, "Take this and install it first, and bring the rest later."

Li Hang nodded repeatedly: "Okay."

After talking to Li Yu, Li Yu asked Li Hang, He Chao, and Zhou Ran to carry these things around the camphor tree base to the cliff.

After a while, Li Hang and the others drove these things to the cliff.

Li Yu, Ding Jiu and the others were now next to the boulder, watching them drive slowly over.

In the sewer, Lao Lu, Xu Zhen and others were waiting below.

………

The sun slowly sets to the west. It is already 4 pm and will set in another hour and a half.

In the big camphor tree base, the wind blows the rice, emitting a fragrant smell.

In the scientific research room, there was a burst of discussion.

Bai Jie said helplessly to Anya:

"Xiaoya, you want fertilizer.

Just use soil and chemical fertilizers. I will give you five methods.

The first one, ammonium bicarbonate fertilizer

Method: 100 kilograms of fresh cow dung (chicken manure and sheep manure are also acceptable), 1 kilogram of soybean powder, and 8 kilograms of calcium sulfate (gypsum of paris powder).

Second: ammonium sulfate fertilizer.

Just use 50 kilograms of human feces, 5 kilograms of calcium sulfate (gypsum of paris powder), add 20 kilograms of water, stir and mix evenly, seal it and leave it for 10-15 days. This fertilizer is mainly used for top dressing, and the time byte is used for trenching. Chase.

Even if you are afraid that you have to use compound fertilizer, the method is very simple.

150 kilograms of human feces and 100 kilograms of superphosphate are mixed and stacked, and the top is sealed with soil and mud. It can usually be used in 7-10 days. The fertilizer made by this method can be used as base fertilizer and top dressing. Due to its strong fertilizer effect, however, in the end It is best not to use it for mixing seeds to avoid affecting the germination rate.

………”

Bai Jie finished speaking in one breath. She didn't understand. Anya should know this knowledge.

as expected.

"I know everything you said. I'm looking for pesticides from you. Some bugs were found in the crops last time. Just in case, you can prepare some basic pesticides for me." Anya said.

"You should have told me earlier..." Bai Jie was stunned for a moment and murmured.

………