Two months later, the well-groomed green wheat fields are spectacular.

In his previous life, Gu Guo took the high-speed train, drove on the fields of Jiangjiang, and overlooked the endless rice fields from a height of 20 meters above the ground.

Now he felt like he was on earth, with the familiar countryside close in front of him, with clusters of wheat growing neatly between the ridges.

Under the blowing of the summer breeze, the rhythm of layer after layer of rhythm was accompanied by the rustle of the fluffy sharp leaves rubbing against each other, which made Gu Guo, who was standing on the ridge of the field pulling weeds, feel extremely happy.

The wish to grow food from the land is finally coming true.

On the other hand, the tubers planted in relatively small quantities have long been flourishing, and the tubers full of roots are now absorbing the nitrogen, phosphorus and potassium in the soil, and the solar energy is converted into starch under the photosynthesis of chlorophyll and fixed on the fat rhizomes.

When the people of the other tribes heard the news that food could be grown in the fields, they expressed their desire to exchange copper coins.

Gu Guo readily agreed, but this year's harvest of wheat can only be used as seeds.

He is also not sure how many seeds will be harvested from 1.5 tons of second-generation wheat seeds. Don't look at the wheat ears in the wheat field now are full and lush, and when the wheat ears turn ripe after more than a month, there may be only eighty or ninety percent of the wheat ears that can remain.

But even if it is only eighty or ninety, another wave of planting in the next year will be enough to feed 400 people, but at that time, the amount of land reclamation work, three curved ploughs are not enough.

And those wheat grains that fall into the soil will sprout again in the spring of the next year, so as to pollute the genes of the second generation, so the experimental field opened up by Gu Guo in the city is still operating, and the three generations that have been screened again are planted at this time.

He calculated in his heart that the population of the settlement could be expanded to 800 people next winter, and compared to the tribes that relied on plundering population and food to grow rapidly and decline immediately, the settlement of the Gu Kingdom would rely on the land to survive.

"Xiao Feng, come!"

Gu Guo beckoned to Xiao Feng, who was also weeding in the field, and the little girl wore two braids and walked a full hundred meters between the ridges before standing in front of her brother out of breath.

"Xiao Feng, in the future, the things in this field will be handed over to you, have you learned the steps of planting wheat?"

More than two years have passed, and Xiao Feng has grown from the little Lori who was originally half a cut shorter than Gu Guo to a generous girl.

"Brother, I've learned everything! Now they have made a threshing machine! ”

Gu Guo snorted and let Xiao Feng continue to work, while he ran back to the city to inspect the construction progress of the threshing machine.

There are many ways to get the wheat off the ears of wheat, and using a wooden flail to constantly beat the ears of wheat is one of the easiest methods, but Gu Guo has not yet made a concrete floor, and using a flail will only beat the wheat into the soil.

Another way, which is much more difficult to implement, is to make a hand threshing machine.

When Gu Guo was a child, he and his grandfather used a hand-cranked threshing machine in the field, where the rice was thrown into the wooden bucket above, and the iron crank was turned, and the broken stems and leaves and hollow millet would be blown out of the side opening, and the millet would fall from a small groove in the front due to gravity.

When he was a child, he patronized the rotating handle for fun, but he didn't think about the internal structure at all, and now he can only rely on what he learned in his previous life to restore this instrument.

Under Gu Guo's preliminary design, Gui has spliced the core hand-rock roller, which is inlaid with U-shaped copper rings on the surface, and is now tightly installed on the wooden frame.

Don't look at the fact that this thing is made of wood and a small amount of metal, but you need to use the knowledge of high school physics and some trigonometric functions, and Gui, who can only solve one-dimensional equations at the mathematical level, is naturally not competent for the design work.

First, the U-shaped copper ring on the rotating drum will first break the ears of wheat, and the crushed ears will follow the rotation of the drum until the individual wheat and broken branches and leaves are separated.

Separated crushed leaves and wheat, determine the quality relationship between the two, mass determines inertia, when separating, the drum turns too fast will blow out the wheat and crushed leaves together, and if it turns slowly, the two can not be separated.

Therefore, it is necessary to bring in the rotational speed of the hand-crank under normal circumstances to determine the centrifugal inertia and air volume generated by the drum......

After a series of calculations, Gu Guo finally drew the design of the hand-cranked threshing machine, and with the size of each part, Gui, who could understand the logo on the design drawing, took the lead in taking over the task.

Gu Guo walked up to the hand-cranked blower, which had not yet been fitted with a shell, grabbed the bronze handle, and turned the drum in a clockwise direction.

With the addition of animal oil, the two plain bearings at both ends of the drum have a low coefficient of friction, and the wear-resistant bronze rings can last for several years.

After praising the Guihe people for a few words, Gu Guo rushed to the production site of the stone mill again.

Without animal power, it is purely manual grinding, and there is no need to make large stone grinding discs.

Under the chiseling of the bronze chisel, ten small grinding discs the size of washbasins are neatly stacked together, and there is no difficulty in making the grinding discs, there are no complicated calculations, but it took a long time to pick the stones.

Everything is ready, just wait for the 42,500 square meters of wheat in the field to ripen.

The scorching sun was in the sky, and a wisp of wind blew away the sweat on Gu Guo's forehead, and the heat taken away by the evaporation of water vapor made him feel a trace of coolness.

His memories have long since merged with the reinforced concrete of the big city, the mechanical bearings and steel screws fill every inch of nerve cells in his mind, and he has not looked back at the wilderness of his hometown for twenty years.

Standing in the wheat waves of more than 40,000 square meters, people are small, and as far as the eye can see, they are all green of hope.

"It's getting better, it's really getting better!"

This is the joy of growing life with their own hands, just like Xiao Feng, who is still weeding in the field at this moment, and many clansmen, who bend down to pick up scattered stones and grass roots, and sweat drips on this public land that they have worked so hard for.

Gu Guo tied the animal skin clothes around his waist, revealing his well-proportioned upper body, and he was already sweating profusely by now running around.

"We have to find a way to weave linen clothes! Wearing a animal skin skirt in summer, it's really not a taste to rub your thighs lightly, and you squat down and scratch the grass directly! ”

While fanning the wind with a piece of bark, he pondered the basic structure of the loom.

The raw materials for making linen are abundant in the lower reaches of the Tao River, and tons of flax can be brought back by a sailboat to the lower reaches of the river, and when the daily needs are met several times, they can be planted near the city and harvested once a year.

It is completely enough for the city-state that will develop into a few thousand people in recent years, and as for the cotton used to make warm clothes in winter, Gu Guo has not been able to see it all the way south along the Tao River.

"Alas, the world is uneven!"

Sighing, Gu Guo continued to bury his head in the field weeding.