The third watch, the cold wind is dashing, in a forest at the end of the east of Renjia Village, Ren Xiaoyao is sneaky in the woods, gesturing something. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

"I'm tired, hurry up and dig the abyss, and after digging, you don't have to worry about the friends of the "Soul Blade Double Killing" coming to seek revenge. ”

Ren Xiaoyao raised his head and looked into the distance through the woods, and said to himself.

He knew that it was impossible to completely take Renjia Village into the space, so he found another way to defend Renjia Village.

Prepare to dig a 50-meter-wide and 100-meter-deep ditch in the way of a city to surround all the land in Renjia Village and prevent outsiders from entering Renjia Village.

It was the only way he could think of it. Open guns are easy to block, but hidden arrows are difficult to defend.

Although Renjia Village is not large, with only thousands of acres of land, it is impossible for him to take care of everyone at any time by himself.

Because he can't talk about it to others, so as not to cause panic, he can only be passively defensive. Moreover, he has an acquaintance in the middle of the martial arts, and he doesn't know how many close friends he has in the "Soul Blade Double Kill". So you can't take the initiative.

However, he dug the abyss and built the city, but also for the future, in order to become the city lord in the future, he practiced his hands first.

How to plan, design, and manage the city is what he needs at present. Anyway, except for iron, which is more troublesome, you can find anything else.

Choosing a place to excavate, Ren Xiaoyao left the woods, went to the end of the other three directions of Ren's house, and chose a suitable excavation site.

After choosing the location in the four directions, Ren Xiaoyao did not start immediately, but flashed into the deep mountains, looking for a plant.

In order to stabilize the soil of the ditch and avoid landslides and collapses, Ren Xiaoyao must plant plants with very developed root systems on both sides of the ditch to avoid these conditions.

And this time Ren Xiaoyao went into the mountains in search of a grass--- vetiver grass.

Vetiver is also known as vetiver; As the name suggests, because its roots are very fragrant, it is called vetiver grass, which is a kind of herbaceous plant that grows in the grass family for many years.

It has the characteristics of strong adaptability, fast growth and reproduction, developed root system, drought tolerance and barrenness;

On the earth, it is known as "the herbaceous plant with the longest root system in the world" and "magic grass"; It has been listed as an ideal water and soil conservation plant by more than 100 countries and regions in the world.

Vetiver grass is a bit like lemongrass, the aboveground part is densely clustered, the stalk height is 1 to 2 meters high, the depth is developed, the root system can be about 3 meters deep, and the tension resistance is 1/6 of the equal diameter steel.

On the earth, vetiver grass has the longest deep root system of 5.2 meters long, which is recognized as the most developed root system among herbaceous plants on the earth.

Because vetiver can adapt to a variety of soil environments, strong acids and alkalis, heavy metals, drought, waterlogged, barren and other conditions can grow.

Therefore, this grass will be very easy to find as long as it is in its preferred climate and geographical environment.

Vetiver is a low-compensation plant with strong photosynthesis and germination when the daily temperature reaches 10C. Likes to grow water next to wet streams and loose clay loam. It is a very coarse herbaceous plant.

Ren Xiaoyao knows this vetiver because he watches more news. He was not a farmer in his previous life on Earth, and he didn't know many plants like the old farmers.

He knew that vetiver only knew about it when he watched a news broadcast.

Because of the destruction of nature by human beings on the earth, a large amount of soil erosion, to prevent desertification of the land, a certain area launched a soil erosion protection program.

Due to the fast growth, strong resistance, good penetration, tensile strength and other excellent mechanical properties, vetiver can grow in areas with temperature of -10~50C and annual rainfall of 300~6000mm.

It can be used to protect roads, river embankments, terraces, etc.

According to a related doctoral study, vetiver can reduce surface runoff by 73% and soil erosion by 98% compared to bare land.

A recent study by the University of Malaysia has shown that vetiver grass retains 600 grams per square metre of soil erosion, while cow grass only 89 grams per square metre.

So vetiver is a plant that Ren Xiaoyao needs very much.

After a while, Ren Xiaoyao came out of the deep mountains, still holding a bundle of weeds similar to lemongrass in his hand.

"I didn't expect it to be so easy to find. If this grass could be more strong, it might save the planet. ”

Ren Xiaoyao looked at the vetiver in his hand and muttered to himself.

Vetiver blooms in autumn, is generally fruitless, and is mainly propagated by tillering, and rarely bears fruit under natural conditions. Therefore, this grass cannot be planted in a large area.

However, this question is not a problem at all for Ren Xiaoyao.

Now that the Spatial Spring Water Essence is about to advance to the third stage, it has become the end of the second stage, which is dark green, and you can directly grow plants without seeds.

And this process only requires a little plant structure, like a piece of fruit, a leaf, and a root system to grow a plant.

"Hey, hey, if I sell this plant in large quantities to cities with serious soil erosion on the earth, I don't know if I can make money." Ren Xiaoyao remembered the role of vetiver and muttered to himself.

"Forget it, the wishing tree in the space doesn't know when it will be 10 meters high, even if it is 10 meters high, there is no guarantee that it will return to the earth, so let's solve the matter in front of us."

As soon as the words fell, I saw a white light flashing on the middle finger of Ren Xiaoyao's right hand, and in the middle of the air in the woods, a bland knife, a shovel, and a hoe appeared out of thin air.

Ren Xiaoyao looked up at the three spaces with their own immortals that flickered with faint white light, and his mind immediately passed a few commands.

I saw that the knife flashed white light first, flew towards the woods, and when it went to the woods, it descended to the ground, flashed a few blood-red lights, and suddenly rotated 180 degrees, emitting a half-moon red light, and launched an attack on the ground in the woods.

Wherever the red light of the half-moon passed, the protruding dirt, trees, and weeds were all cut and lifted into the air.

At the same time as the knife was lifted and chopped down, the moment Ren Xiaoyao landed on the tree, on his forehead, between his eyebrows, a dazzling golden light emanated, which made people unable to look at it directly, and collected all the trees into the space.

After the knife hacked the plants in the woods to death, it rose vertically, flew into the air, and tilted to the ground at a 70-degree angle ten meters in front of the last piece of land in Renjia Village, emitting a more dazzling half-moon light than before.

Bang... Bang...

Two loud noises rang out, and the ground shook visibly. After that, the knife returned to Ren Xiaoyao's side, and its mission was completed.

"I'll go, why are you shaking like this, there's nothing underground, right?" Ren Xiaoyao didn't expect the ground to shake violently, and he was shaken down without paying attention, and got up from the ground with a gray face and whispered.

Looking at the two knife marks on the bare land, Ren Xiaoyao hurriedly passed the order to the shovel and hoe.

I saw that the shovel and hoe received Ren Yao's order, flashed white light, and flew quickly to the bare land, emitting a faint white light, and at the same time became larger.

The shovel and hoe, which were originally the same as ordinary farming tools, slowly became an "excavator", with the handle as thick as the mechanical one, and the head became as big as the excavator's digging head.

With a huge hoe, Ren Xiaoyao, who was 100 meters away, could feel the vibration.

Ren Xiaoyao watched the hoe and shovel, and quickly cut the ground with the knife and dug up the soil.

When digging to a depth of 50 or 60 meters, Ren Xiaoyao heard the sound of clanging and clanging, and the pit flashed white light from time to time, and there was a sense of vibration in the ground.

Driven by curiosity, Ren Xiaoyao slowly approached the dirt pit, and he saw that in the ground dozens of meters deep in the soil pit, a complete gray-white granite was exposed.

Ren Xiaoyao was stunned for a moment when he saw the granite on the cement floor, and the whole person was stunned, he didn't know how there was granite underground, and it was a large area of granite layer without interruption.

It is important to know that granite is the main component of the continental crust, which is an igneous rock formed by the condensation of magma below the surface, and belongs to deep intrusive rocks.

In simple terms, granite is formed by the cooling of volcanic lava.

"This Renjia Village must have been a volcanic area before, right? Such a complete granite can only be formed by volcanic eruptions and flowing to the ground. ”

Ren Xiao muttered to himself when he saw the granite in the pit.

Granite and basalt belong to the same magmatic rock, the difference is that when magma erupts, granite is an underground part, formed under high pressure, and the texture is much tighter than the basalt formed after erupting from the surface, so it is very hard.

"Hehe, if yes, that's interesting, I don't have to look for limestone to make cement."

Ren Xiaoyao saw the wide area of granite formations, and thought of the report on natural cement.

Granite's unique physical properties, coupled with its beautiful patterns, make it an excellent material for construction, known as the "king of rocks".

Granite can be used in construction from the roof to the floor, as well as the curbs of sidewalks, and if crushed, it can be used to make cement or rock-filled dams.

The natural mud made by crushing and grinding granite is the strongest natural cement in natural cement, and is even a few points stronger than ordinary cement.

It's just that granite is too hard, and the cost of crushing and grinding is too high, and not many people will use it as a raw material.

"It's really an eye-opener, when I was still worried about going to find limestone, the people from the martial arts rushed over, now it's okay, now I don't have to look for limestone."

Ren Xiaoyao was sure that the stone in the pit was granite, and said excitedly.

In the next time, Ren Xiaoyao was busy directing the knife to cut the granite in the pit, and he was very busy.

When it was almost dawn, Ren Xiaoyao had not yet cut out the bottom of the granite.

"Damn, how thick is this granite layer? It's been cut thirty or forty meters, and there is still no bottom. ”

Ren Xiaoyao looked at the hundred-meter-deep pit with sweat on his head, speechless and excited. I was very interested in the thickness of this granite.

"Forget it, let's plant vegetation on the hillside first, otherwise it will be difficult to do it at dawn" Ren Xiaoyao glanced up at the sky, and when he saw that it was almost dawn, he gave up and continued to cut granite.

I saw that after Ren Xiaoyao put the cut granite into the space, he used a knife to "ride" vetiver and inserted vetiver on both sides of the pit.

I also deliberately entered the space once and broke a lot of chestnut branches. One by one, the chestnut branches were inserted into the two banks of the pit with a knife.

Because vetiver can only take root shallowly, I am afraid that it is not solid, so Ren Xiaoyao deliberately found a chestnut tree to take deep roots.

Chestnut trees are deep-rooted plants, and the chestnut trees with the most developed root systems can reach a height of hundreds of depths, which can well protect the slopes from large-scale collapses.

Deep-rooted plants refer to the taproots of plants that can penetrate deep into the soil, and the root system of plants mainly develops in depth.

Shallow-rooted plants refer to the development of plant roots in a strict horizontal direction, and the distribution of roots in the soil is related to the survival and growth of trees.

The stems, branches, flowers, fruits and leaves of the aboveground parts of the tree must rely on the root system to absorb water from the soil and mineral nutrients to grow and develop, and to hold the tree body to the ground.

Therefore, the distribution and growth of tree roots in the soil and the development of aerial parts must maintain a certain balance.

According to research, under natural conditions, the depth and width of the root system are often greater than 5-15 times the canopy area.

The vertical and horizontal distribution of tree roots in the soil varies according to the influence of tree species, genetics, growth and development, and human factors in the soil environment.

Therefore, according to the distribution of roots in the soil, they are divided into two categories: deep roots and shallow roots.

When all the vetiver and chestnut trees were inserted into the slope of the soil pit, a golden light flashed between Ren Xiaoyao's eyebrows that made it impossible to look at it directly. Suddenly there was a milky blue drizzle over the pit.

I saw the milky blue rain falling in the bare soil pit, attached to the vetiver and chestnut branches that Ren Xiaoyao had just planted, and the vetiver and chestnut branches grew wildly like stimulants.

This is especially true for chestnut trees, which can grow up to 30 meters tall under natural conditions.

A short branch grows to a height of more than ten meters in a short time.

Vetiver grass may as well be more, from the original short, sparse cuttings, into a dense grass forest, all over the slopes on both sides.

Ren Xiaoyao saw the blink of an eye before and after, and the completely different soil pit dissipated the golden light between his eyebrows.

When the golden light dissipated, the blue drizzle also disappeared.

"This should be fine, right? If a bowl of spring water essence is wasted, the mountain should not collapse, and when the other three sides are excavated, you can start building the city wall. ”

Ren Xiaoyao looked at the dirt pit with dense grass and trees, and muttered to himself.

.....

.....

While Ren Xiaoyao was observing the mountain situation, many villagers in Renjia Village who were going out to cultivate the land were discussing last night's "earthquake".

"Did you feel it last night? When I slept until the fifth watch, the ground seemed to shake twice, and I thought it was an earthquake. ”

"You feel it too? I thought it was my delusion, this day the old man didn't know what was going on this year, I heard Lao Niu say that there was a locust plague on the other side of the Chu River, and we had another earthquake. ”

"Why do you want to do so much? If you should sleep with a woman, you will sleep with a woman, and if you should work, we will work, and we can't go against God. ”

"Hahaha, that's right, Lao Tai is right, the earthquake will be an earthquake, what should be done, why worry about it in vain."

.....

.....

Just as a few people were talking and laughing, they walked towards the cultivated land, and suddenly a few strangely dressed old men followed behind them.....

To be continued.......... (To be continued.) )