After seeing off Ilully and Leon, Donn went straight to the Engineering Research Institute.

"Where's Brian?"

The young man who was stopped said flatteredly, "Master Brian is in the back of the furnace." ”

Furnace?

When Donn found Brian, the guy was working on something with a high face, and although it was snowing outside, it was very dry near the steaming furnace, and the nearby apprentices were even sweating profusely.

"What are you doing?"

"Big brother, are you here?"

Brian laughed wildly, "I was inspired by the previous battle, and I decided to create a new type of armor, trust me, you'll love it then!" ”

“…… Well, then you come on. ”

Originally, I wanted him to be in charge of building a greenhouse, but seeing him like this, I'm afraid he won't be able to calm down in a few days, Tang En simply went to Nokia, and the dwarf craftsmen should be more interested in this kind of knowledge.

"Greenhouse?"

As expected, Nokia was very interested: "Can you elaborate on that?" ”

Don and Nokia chatted over hot drinks, and he told Nokia about the principles and key points of the greenhouse - in fact, he only knew a little about the greenhouse, only knowing that it was to use glass or plastic to insulate the cold air and keep it warm, and to grow out-of-season vegetables in a constant temperature and humidity environment.

But knowing that this method is feasible, it is enough in Prandal, and if you can't figure it out, you can solve it with magic, which is the essence of magic reform.

"I see, it's a great idea, but I don't think it's very feasible."

Nokia was amazed at Donn's idea, but he dismissed the viability.

Edgar, who was doing nothing next to him, also shook his head: "Just by changing the environment such as temperature and humidity, you can make vegetables grown in other seasons grow in winter...... I think it's incredible, I'm afraid this kind of thing is only gods...... Oh, and elves, like Miss Grandia, can do it. ”

Due to Grandia's recent activity, her popularity in Ellington is quite high, and many people know that the food they eat is grown by Grantia, so they are very grateful to her.

"Relying on the power of the druids is too limited after all, what I want to solve is a method that can be replicated, no matter who it is, as long as the greenhouse is built and implemented according to the standards, it can be replicated successfully, and vegetables and fruits can be grown."

Although the power of the druids is convenient, it is impossible for humans to rely on elves all the time, not to mention that the number of elven druids is so small, how can it be possible to meet the needs of the entire human race? The key to solving the problem is only by relying on human beings themselves.

"Well, as you said, give it a try."

Nokia clapped his hands and said, "Anyway, it's snowing recently, and there's nothing big going on the researcher's side, so let's give it a try." ”

Crystals and multi-alloys were available, so they just prepared a little bit and started work in the afternoon.

The place they had chosen was a field outside Ellington that had not yet been leased, which had been frozen by the snowfall, and the frozen ground was very hard, but with Donn there, of course, none of this was a problem.

"Are you sure this is possible?"

As the Minister of Agriculture (nominal), Grantia was also called, and the little girl was hiding in the three leaves drinking hot fruit tea and waiting to see the sketch for the first time, but was dragged out by Tang En, and she was complaining that there was no place to sprinkle it.

Obviously, it was already snowing heavily, and the snow on the ground was still very thick, but Grandia was still wearing the emerald green short-sleeved skirt she had before, and she didn't feel cold at all.

"Of course it works...... Aren't you cold? ”

"We elves are a race that can be in tune with nature, and of course it won't be cold."

“…… You're not cold-blooded. ”

Don is no longer able to complain, how much does Nessclaire hang up on the elves?

"The first time I built it, I did it myself, Nokia, you record the key points and tips of the construction, make it into a standard manual, and be sure to let others copy it according to the manual in the future."

Don said, with one hand in his hands, a twisted vortex appeared above his head, and the precision-cut multi-purpose alloy flew out one after another, hanging in the air at a certain distance, and there were some thin pipes connected to each other.

As soon as Don snapped his fingers, the universal alloy pillar fell to the ground with a "boom", firmly piercing into the frozen soil, and then the frozen soil dissolved and lifted under the action of magic power, and after tightly wrapping the universal alloy, it turned into stone again, firmly fixing the pillar there.

After all the pillars were secured, there were the surrounding walls - since the walls would consume a lot of universal alloys, the current output could not be wasted like this, so Tang En used a very crude solution - earth spells.

Using the earth-based spell Stone Wall Technique, a solid stone wall was built, which was inexpensive and durable!

After installing the alloy gate on the remaining exit, Donn began to cap it.

Large pieces of colorless transparent crystal were taken out, after processing, these crystals are very flat, and the light transmittance is very high, which is very suitable for the roof of the greenhouse.

Of course, the cost of these crystals is slightly higher, and if you have quartz sand, you can definitely reduce the cost even further after firing glass of various shapes.

The crystal is fixed by the card slot on the universal alloy, and after the crystal is laid one after another, the card slot is firmly buckled on it, which is very stable.

These crystals are only as thick as a little finger, but because of the magic circle to be placed here to protect the greenhouse, there is no need to worry about the sturdiness at all, and the more troublesome thing is to increase the thermal insulation effect, so the double-layer structure is used - including the stone wall just now.

Soon the roof was all sealed.

"Is this a greenhouse?"

Grantia frowned slightly: "Isn't it just a sealed house...... The top is made of crystals only. ”

"That's not all."

Tang En motioned for everyone to enter the greenhouse, and after closing the door, the cold wind disappeared from all around, but there was still thick snow and cold air in the greenhouse.

"The reason why it's called a greenhouse is because it's warm inside...... Wait a minute. ”

Don snapped his fingers: "Fire." ”

I saw that the blazing flames around Don instantly ignited, and those flames turned into a brilliant ribbon, flew out, and spun in circles in the greenhouse, and the snow on the ground was melted in the blink of an eye, and turned into water vapor that gathered on the ceiling, froze on the crystal, and melted again......

The temperature in the greenhouse rose rapidly, the hard frozen soil began to regain its softness, and all the moisture in it was released, and soon the whole greenhouse became humid and stuffy.

"Whew! It's so boring! ”

Edgar couldn't stand it anymore and unbuttoned his shirt: "The magic is incredible, it's such a cold winter, it's so hot without a fireplace." ”

"Almost."

After the frozen soil in the field was turned over several times, Tang En dispersed the fire element, and the temperature in the greenhouse has climbed to twenty-eight or nine degrees at this moment, and because it is a closed double-layer insulation environment, this temperature will be maintained for a long time, if it is full of vegetables and fruits, and there is more carbon dioxide, the insulation effect will be better.

"Dikarios, your little brother can come here."

Don said to the air, and then a fire elemental appeared out of thin air next to him, and the fire elemental looked at Tang En dumbfoundedly, waiting for his order.

"Fire elemental?"

Nokia asked curiously, "Are you trying to use the fire element to keep the temperature here?" ”

"Yes, do you see the stove in the middle? There is a central boiler with all the pipes, where the fire element heats up when the temperature drops, and then the hot water is transmitted through the pipes to the whole greenhouse, raising the temperature here...... I call it heating. ”

"No one else can hire elemental creatures."

Seeing the fire element burrowing under the boiler in a daze, Tang En smiled and said, "The standard manual can be changed to an incineration boiler to quickly increase the temperature...... In fact, if you use compost fermentation, you can also increase the temperature, but the efficiency is too slow. ”

"As for humidity and sprinkling, you can let the water element help, and the instructions should be written according to the previous pipe irrigation technology."

"In addition to these, because it is in a greenhouse, it is too troublesome to drive in the agricultural cultivator, so the cultivated land can use the power of the earth element."

"After planting a large number of crops, a lot of carbon dioxide will accumulate in it, and when the time comes, you can use an exhaust fan powered by magic energy, or with the power of the wind element......"

"My lord, what is carbon dioxide?"

“…… A colorless gas, if the concentration is too high, it will kill people, so mark it out. ”

Nokia quickly jotted down these key data, whether it was double glazing to keep warm, or carbon dioxide, a deadly colorless gas, it was very fresh knowledge.

"In order to let you see the results as soon as possible...... Grandia? ”

Don smiled and waved his hand, Grantia reluctantly walked out, took out the vegetable seeds that had been prepared long ago, she just threw them casually, and those seeds fell accurately into the turned soil, more than ten acres of farmland, she finished sowing in minutes.

It takes a lot of time for the seeds to germinate, but in order to get them to see the results of the experiment as soon as possible, Donn asked Grantia to run a catalytic experiment, as long as they saw that the seeds could grow normally in the greenhouse, the effect was already achieved.

In fact, if it weren't for the fact that he didn't know how to synthesize nutrient solution, Tang En would have wanted to directly engage in soilless cultivation with higher efficiency, which not only took up less space, but also increased the yield of many vegetables a lot, and the yield per unit area was increased geometrically.

Now, he can only use greenhouse technology to barely improve the vegetable production here, at least after the vegetable production goes up, it will fill some food gaps, reduce the price of winter vegetables, increase people's average nutritional intake base, and finally improve their comprehensive physical fitness.

Of course, Donn's ultimate goal is to increase their average combat effectiveness. (To be continued.) )