The times are advancing, technology is advancing, in order to adapt to the different needs of farming and sowing farming, the industrious ancestors made the main components of the plough into parts that can be disassembled and assembled, and when used, they are combined according to needs.

This is more than a notch higher than the standardized production of the U.S. military, it is simply the original version of the Transformers, could it be that the Saiyans visited the earth in the primitive era?

With the cultivation of the plow, there is a real sense of farming agriculture, so that a large area of millet and pepper (soybean) has become a reality, and began to gradually domesticate and cultivate some wild plants into crops suitable for cultivation.

Such as millet, rice (wheat), mu (barley), rice, hemp, etc., later generations will collectively call these crops "five grains" or "hundred grains" ("Book of Songs" said), and left a lot of beautiful legends of "Shennong created five grains".

In fact, the invention and improvement of production tools and the domestication of wild animals and plants are gradually realized by human beings in long-term production practices.

Later generations attributed all these achievements to Emperor Yan, showing people's respect for him and nostalgia for their ancestors, but in fact, many improvements were created and invented by ordinary working people.

Some archaeologists pointed out that the Yellow Emperor and the Yan Emperor may actually just be the names of the leaders of the two tribal alliances, in fact, the leaders of these two tribes for several generations are called the Yellow Emperor or the Yan Emperor.

You must know that the life span of primitive people is very short, and the emperor actually tasted a hundred herbs, which is an extremely dangerous job, and it seems unlikely that he will have so much time to do so many things.

At this time, Wang Tian couldn't help but think: If he made a plow, and then the legend is still the same, wouldn't he become another Yan Emperor, with this idea popping up, Wang Tian couldn't help but laugh at himself.

As for the materials used to make the plows, Wang Tian did not plan to use wood, unless he could find a very dense wood material.

Otherwise, the wooden plows are too easily damaged, and the tribe will plough virgin land that has never been cultivated, and I don't know if it will be washed away by rain and hail meteor showers for tens of thousands of years, or hundreds of thousands of years!

He decided to choose between stone tools and bone tools, which are harder and more wear-resistant than bone tools, but the toughness will be much worse.

Considering that the 900 acres of arable land in front of the tribe are all muddy soil, resilience is relatively more important.

Wang Tian finally chose to use bone tools to make it, and after years of hunting, the Tianlong tribe has accumulated a lot of all kinds of bones in the tribe's cave, and Wang Tian is not worried about finding suitable materials.

Especially the bones on the altar as sacrifices, I don't know how many times they have been touched by the witches of the Tianlong tribe for generations, and the surface is covered with pulp and color......

If Wang Tian could travel back to the afterlife, then he would definitely choose to take them away, but now they are there, just a few ritual vessels.

Of course, Wang Tian didn't dare to really hit the idea of these bones, and religious beliefs should not be touched easily, otherwise the consequences would be very serious. Even if he was the son of heaven in the tribe, Wang Tian would not dare to die in a fancy way.

In fact, it was completely unnecessary, and it didn't take a long time for Wang Tian to dig out a lot of bones that were both hard and big enough.

Wang Tian first chose a bone that was about a rectangular shape, "about 45 centimeters in length and about 30 centimeters in width."

If the length is too long or too short, it will be difficult to step into the dirt with your feet, and if it is too short, the distance to penetrate into the soil will not be enough after installing a wooden handle.

Now the size of this bone is just right, and after installing the wooden handle, the length that can penetrate into the ground is about 30 cm, and the wooden handle will be tied to the top of 1/3 of it.

You can climb to a depth of 30 centimeters in one go, which is twice as much as before, and after turning it over with a rake, you can dig up a piece with a hoe.

Then the land used for breeding can meet the requirements of 50 cm deep, of course, other land can be ploughed once with a plow.

The purpose of ploughing is to make the soil fluffy and ventilated, which is conducive to the growth and development of plant roots, and the root growth is not restricted, so as to provide sufficient nutrients for plants.

If the soil is compacted, except for the root system of woody plants, which can be pierced, as a crop of grasses, there is no way to take this compacted soil.

Even the root system of the plant can't expand to 4 weeks, so the plant can only grow into small bean sprouts, and the wind can blow down, which is the reason why the ground needs to be ploughed.

After selecting the right bone, Wang Tian called a big hand, according to the appropriate width he chose as the cutting edge position, and thinned the edge of the edge on the stone, and sharpened it as much as possible.

After the cutting edge is sharpened, the next question is how to fix it, in primitive times there were no nails and no screws, and it was impossible to lock two workpieces with this.

There will also be no natural mounting holes left by the shovel when the shovel was built in later generations, and the wooden handle can be pierced through the hole left on the shovel.

To install and fix, you must first drill the hole where the handle is installed on the bone. This kind of hole was almost impossible to complete before the arrival of Wang Tian's crossing, but since the hand drill, everything is not a problem.

Many things are easier said than done, and before there is a hand drill, if you want to make 4 wooden handle mounting holes on the bone tool, Wang Tian estimates that it will not take a month to complete.

Even now that the Tianlong tribe has a hand drill, it is not easy for Wang Tian to drill these 4 holes, the first thing to overcome is how to fix the drill bit on the smooth bone, Wang Tian has already felt it when he tried to drill the first hole.

If you have drilled holes in ceramic tiles or glass, you will understand how difficult it is to drill holes in smooth bones, and it is so difficult to use an electric drill, not to mention that the speed is far less than that of a hand drill with an electric drill.

A total of four installation holes need to be drilled, and two pairs correspond to each other, so as to thread and fix the "rake" of the bone and the wooden handle, and the first pair of holes are drilled in the middle of the bone head.

The second pair of holes are drilled in the upper part of the bone, and in order to maintain the firmness of the edge of the bone, this pair of holes should be about two to three centimeters away from the edge.

How to tie up and strengthen the hole after drilling, this is not an easy thing, the connecting part needs to be forced, and the part that needs to be stressed is tied with a rope.

This installation method seems unscientific to think about, but it can only be so under the existing conditions.