The Tiger Tribe was the first matriarchal clan encountered by the Dragon Tribe, and it was the first tribe with fewer women than men, which was truly magical.

The number of the Tiger tribe that was separated and integrated into the Dragon Tribe was quite large, a total of 220 people, including 61 adult males, 60 adult females, 95 minors, and four sick and disabled.

Coupled with the two tribes conquered before, they all have to integrate into the dragon tribe anyway, no longer counting the number of slaves, the total population of the dragon tribe has stepped from more than 3,000 to nearly 3,500 people, the adult male tribe is in the early 500s, the adult female tribe has exceeded 1,000, and the adult labor force that the dragon tribe can put into labor is also more than 1,000 people.

Needless to say, the benefits of the increase in labor force were that when the four patriarchs of Zhi, Biao, Yang, and Song led the expeditionary team to fight abroad, the various tasks of the Dragon Tribe had already begun.

Yuan took two hundred tribesmen to the copper mining area to mine copper ore, and was responsible for daily fishing and labor, and the matter of organizing the hunting team to go out was handed over to Jian by Su Yan, who personally led the tribe to expand the residence, expanding the residence from the scale of a small village to the size of a small city.

Building a city is not a trivial matter, although this city may be smaller than the smallest county town in ancient China, but after all, it is a city, covering an area of more than 800 acres, and the length of the city's walls is more than 900 zhang.

The walls of the city did not need to be as wide and tall as those of ancient Chinese cities, but they should also be a little wider and taller than the walls built by the dragon tribe before, and there should be more lookouts close to the walls.

In general, the construction of the walls is the largest part of the construction of the entire city, and the houses in the city can be made in batches without the need to assemble.

Su Yan mobilized more than half of all the adult labor force of the Dragon Tribe to build the city wall, with a total number of more than 500 people, and minors and even pregnant women on the side, it is expected that the city wall will be completed in this spring.

Here's where the benefits of a larger population and more workforce come in, and a project of this magnitude can be completed in just one spring, something that was previously unimaginable.

Now that the first month of spring is coming to an end, the construction progress of the city wall has reached one-third, even a little faster than Su Yan's estimate.

The construction of the city is underway, the spring external strategy has been successfully completed, and it is about to enter the second month of spring, and there are three important things to do.

The first thing is to plant crops, there are more than 3,300 acres of land to be planted, Su Yan plans to suspend the construction of the city for a few days, and lead most of the labor force to cultivate the farmland first, five or six hundred labor force, it is expected that it will only take a few days to get the more than 3,300 acres of land.

The second thing is the exploration of the southern region of the Dragon Tribe, first build a pontoon bridge over the river, this will not take long, it happens that the mining team in the copper mining area is going to be rotated, Su Yan plans to hand over the exploration task to Yuan, and form an exploration team of fifty people, such a scale of exploration team, even if you encounter enemies, you don't need to be afraid.

The importance of the third thing is also on top of the first two things, Su Yan will send Yang to lead a team of people to bring gifts to visit the three primitive tribes closest to the dragon tribe on the left bank of the river, the ultimate goal is naturally to invite the three tribes to join the dragon tribe, it is best to accept the invitation to join the dragon tribe, if you don't join, you can only conquer by force.

……

Spring ploughing also has to choose the time, Su Yan chooses the time is often the second month of spring every year, the cold of winter in the first month of spring has just receded, it will take time to completely recede, and when the second month comes, the temperature outside is almost suitable for crop cultivation.

There are three kinds of crops planted this year, millet and hemp, which are already familiar, and the third is the green onion that the eagle tribe sent as a gift last year.

Millet is still the largest crop in terms of planting area, and the planting area of millet will reach 2,300 mu of 3,300 mu of farmland.

This year is the fourth year of planting millet, the yield per mu of millet in the first three years is seventy catties, eighty-five catties, ninety catties respectively, in the process of continuous optimization, the yield of millet will continue to be improved, the initial improvement is the fastest, and the subsequent promotion will slow down.

It is impossible for Su Yan to make the yield per mu of millet reach the modern level, but it is still possible to make the yield per mu of millet exceed 200 catties, Su Yan is ready to train a few young clansmen to be responsible for crops, teach them a little biological knowledge, at least to know how to increase the yield per mu of crops.

The second largest planting area is hemp, and the planting area of hemp will reach 1,000 acres, an increase of 200 acres over last year.

There are two kinds of hemp products: hemp seeds and hemp fiber, hemp seeds can be eaten or squeezed for oil, in fact, sesame seeds are also a kind of hemp seeds.

The yield per mu of hemp seeds is not as good as that of millet, and the upper limit is much lower than that of millet, Su Yan has never thought of hemp seeds as a staple food, even if the yield per mu of hemp seeds has reached 80 catties.

Su Yan has already put the matter of hemp seed oil extraction on the agenda, and when he has time, he will try to extract hemp seed oil instead of eating hemp seeds as a snack.

Compared with hemp seeds, hemp fiber is the most important place, the dragon tribe's fishing nets, hemp clothes, hemp rope and other things need to use hemp fiber, with the dragon tribe's demand for hemp fiber increases, hemp planting area will increase almost every year.

There is only one problem, the yield per mu of hemp seeds will increase every year, but the yield per mu of hemp fiber has hardly increased.

If you want to increase the yield per mu of hemp fiber, you can choose the seeds planted next year according to the amount of hemp fiber produced by a single plant, but there may be a decrease in the yield of hemp seeds per mu when the harvest is harvested in the autumn of the next year.

In modern times, hemp seed yield and hemp fiber yield can be sought together, and in the primitive era, you can only focus on one, if you are lucky, it is also possible to cultivate hemp seed yield and hemp fiber yield have increased, but this kind of thing is more tiring, Su Yan can't do it personally, you can only wait for Su Yan to train a few agronomic talents.

The last green onion, the planting area of the green onion is the smallest, after all, the dragon tribe has just gotten the green onion, the seeds of the green onion have not been collected much, the seeds obtained last year can not be planted an acre of land, can only slowly expand the planting area, the green onion is also the first vegetable planted by the dragon tribe.

Originally, Su Yan also planned to accumulate farm fertilizer, but the farmland surrounded by fruit trees has been planted for several years, and the fertility of the land has declined.

But now it seems that it will not be needed in the short term, this farmland surrounded by fruit trees is being surrounded by the city wall, and in the future, this area will be the living area of the dragon tribe, and no longer grow crops on a large scale.