"Planting the Cam tree?" Sun Jiao was stunned, and a look of embarrassment immediately appeared on her face.

"Is there a problem? If the saplings are available, they should be available in the market, and if they can't be bought, let Zhou Guoping think of other ways to get them. Jiang Chen was puzzled.

"No, it's not the sapling's problem, the sapling is easy to get. Seeing that Jiang Chen seemed to have misunderstood what she meant, Sun Jiao couldn't help but smile bitterly, "The problem is in cultivation." ”

"Cultivation?I remember that this mutant plant should be able to survive on the soil of the last days, is there anything wrong?" Jiang Chen frowned.

Ordinary crops cannot survive on wasteland, which is contaminated with nuclear, biological and chemical contaminations, but mutant plants that have been selectively eliminated and adapted can. It stands to reason that what can be grown in the sixth block, there is no reason why the fish bone base can't be planted.

Hearing Jiang Chen's question, Sun Jiao couldn't help but hold her forehead, so she had to patiently popularize the basic knowledge with him.

If you want to grow on wasteland, you have to consider two factors. One is radiation, and the other is soil pollution.

As long as there is an exchange of matter with the outside world, there is no way to avoid the effects of radiation. There is nothing in the wasteland that is completely free of radiation, not even drinking water that has been treated by automated water purification equipment. It's just that because of the existence of EP and special drugs, the low level of radiation has no effect on people, but plants are not treated so well.

In order for the grown apples not to mutate, it is necessary to control the radioactivity below 1. If the radiation is higher than 5, even if the normal seed falls to the geography, it will have to become abnormal. With the technology of the sixth block, controlling the radiance at 3 is already the limit. From this point, it can reflect how precious the canned fruits Jiang Chen brought.

However, the mutated plants that survive from natural selection are not so precious, and their radiation tolerance is generally relatively high. In the case of the camut tree, for example, as long as the radiation value is below 40, it can grow normally. Most places in the wasteland have radiation levels between 10 and 20. As long as you don't go to a nuclear crater, the radiation level will not reach 40.

Soil pollution is relatively easy to solve, after all, the technology of planting without soil is quite mature in the future.

As a result, plantations in the wasteland can be roughly divided into two types.

One is to use soilless cultivation techniques to grow crops.

The benefit of this type of cultivation is clear: the effects of soil contamination can be completely ignored. At the same time, the yield per unit area is higher than that of soil planting. However, the disadvantage is also obvious, that is, the high cost of cultivation. The use of soilless cultivation technology to produce Camu resin, an industrial raw material, is definitely lost to grandma's house, and is usually used to cultivate some luxury goods, such as mutated fruits that are not completely complete.

The representative building in the sixth block is the CNC planting tower. Of course. Because of the advent of canned fruit, this type of industry has been on the verge of bankruptcy.

The other is to do regular planting on the land.

Simple and crude, sprinkling seeds, watering and fertilizing can produce products. Whether to hire serfs for slash-and-burn farming or mechanized dense planting was a matter of choice to the landowner, and was mainly used to produce less sophisticated variants. For example, camu resins used in industrial production, such as tobacco in various flavors

The advantage of this type of cultivation is that it is low-cost. However, the demand for soil quality is a bit harsh.

In the case of camu trees, for example, the crop can only be grown if the soil contamination level is less than 10. There are very few such treasure lands in the wasteland, so the production of Camu resin is not high even in the sixth block. Originally, there was no demand for these things, but recently they have been in short supply.

"Isn't it okay to buy soilless cultivation equipment?" Jiang Chen asked unwillingly.

"If you grow a camu tree with soilless cultivation equipment, how many subcrystals do you have to spend to get a ton of camu resin? Sun Jiao said helplessly.

Now it's a little tricky.

Jiang Chen's brows couldn't help but wrinkle up, falling into deep thought.

But at this moment, he suddenly thought of Lin Ling.

That's right!

If it is possible to create even a local biosphere, there is no reason why there is no technology to improve the soil, right?

"Did you think of anything?" Sun Jiao looked at Jiang Chen, whose face was constantly changing, in confusion, and asked.

"Hmm. A smile rose at the corner of Jiang Chen's mouth, "It seems." The 'little slaves' in our villa are going to come in handy. ”

Sun Jiao understood in seconds, and a flash of joy flashed on her face

"What??Why do I have to help you?" Fingers pinched the test tube and shook it, the long silky silver hair blocked the disgusted expression, Lin Ling said unceremoniously.

The red and black eyes were the same as they had been before he left, and it seemed that she had become accustomed to the life of an anomalous creature living in her body.

"Because you need to eat. Sighing, Jiang Chen said as a matter of course.

He was somewhat tired of seeing that humiliating expression, but this chick seemed to be happy with it?

"I said, are you being bullied?" Looking at Lin Ling, who began to write and draw on the touchpad with a frustrated face, Jiang Chen said helplessly.

Obviously has a face that is not inferior to a beautiful girl.。 I have to put on such a bad face.

"Die. With the last stroke of his finger, Lin Ling glanced at Jiang Chen fiercely, stuck out his tongue and made a grimace.

"What is this?" Jiang Chen asked, ignoring her movements, leaning over to the touchpad.

"Huh. Stupid—" Lin Ling puffed up her chest, and the corners of her mouth raised.

"Ahem. ”

"Ahh Pouting in frustration, Lin Ling stretched out her finger and pointed on the screen, "The first step is pH neutralization, and the second step is to remove heavy metal ions with an ion filter." The third step is "

"Wait, what is the ion filter?" Jiang Chen stopped her words and asked with his head down.

"Something that can be easily filtered out of a specified relative atomic mass should be common. Lin Ling said very casually.

Damn, I've never heard of it at all.

At this time, Jiang Chen suddenly recalled that this Lin Ling seemed to have been staying in the research institute, otherwise she would not have no understanding of the situation in the last days. In this way, what she says is common is that it is common in the laboratory.

Misguided

"Let me ask first, how many steps do you have to take in these processes?" Jiang Chen asked with black lines on his head.

"No more, no less, just 24 processes. I've sampled the soil here, and the contamination level is 68. It's unbelievable that weeds can grow in such poisonous soil. As soon as she talked about the field she was good at, the expression on Lin Ling's face also became interested.

"Don't you think about the cost when you're tinkering in the lab?" Jiang Chen complained.

"Of course, I will consider it. Lin Ling said disapprovingly.

"You have more than 20 processes, you tell me what the cost is?"

Lin Ling glanced at Jiang Chen strangely.

"Are you misunderstanding something? The Eden Project is not a 'soil purification project', since it is a sub-project of space colonization, why do we have to study how to control the earth's pollution. With organic matter and minerals from other planets, we can make soil, and it's too much trouble to purify it. ”

"Making soil?"

"Yes, it's not difficult to make soil, at least it's much easier than washing the floor. However, it is full of 'finished products' that have been contaminated, and it seems that it is not easy to find raw materials for pure synthetic soil. Lin Ling sighed.

Making Soil? Other Planets?

Jiang Chen suddenly patted his head and cursed in his heart.

Damn, why didn't I think of it. Why is it so troublesome, I can cross on both sides! I can bring back the grain, how difficult is it to get hundreds of cubic meters of mud?

Now that the problem has been solved, Jiang Chen doesn't plan to continue this problem, so he diverts the topic.

"Okay, let's not talk about this for now, by the way, has the task given to you been completed? (To be continued.) )