Lingzhou itself has this geographical environment, the shape of the Yellow River, is the Yellow River, but this nine districts, is in the west of the figure, the east side, has been relatively gentle, coupled with the geographical advantages, there are a large number of tributaries injected, these tributaries, because of the relationship between length and runoff, formed a rich land.

In the Han and Tang dynasties, the Hetao Plain was plugged with pearls, as well as the remaining water conservancy systems, which created the Hetao Plain, which was almost a thousand years of glory.

At the end of the Three Kingdoms, near the Hetao, there was a rise of Dong Zhuo, Ma Teng, Han Sui and other figures, to the Tang Dynasty, although Guanzhong is the foundation, but there is no assessment of the Hetao, how the Tang Dynasty suppressed the Turks and drove the Turks out of East Asia completely.

The years are always an invisible sword, but very terrible, in the long years, even if it is a rich Hetao, but also because of the inability of descendants to cultivate and decline, from the Western Xia to occupy the Hetao, the Hetao has gradually declined, from a plug to the south of the Yangtze River, into a grassland, maybe his grassland is abundant, but compared with the fertile soil of farming, I don't know how much.

These ancient water conservancy facilities were buried in the land because of the yellow sand, and they no longer existed.

But now, when the Northern Song Dynasty reoccupied Lingzhou and had a certain geographical advantage, the impact of re-mentioning this project was very amazing.

One of the key issues is that as long as there is money, it can be reproduced, or even better played, the role of the Hetao Plain, and two prerequisites for this have been solved, one is human and animal power, and the other is money.

Because of the massive population growth in the Northern Song Dynasty, an important issue in the future is the problem between population and food, which is actually the fundamental problem of any dynasty.

The sentence at the beginning of the Romance of the Three Kingdoms, the major events in the world must be divided for a long time, and they must be divided for a long time, which is Luo Guanzhong's judgment in the Ming Dynasty, which summarized a lot of history and finally made a judgment, not to mention Yin Shang and Xia, starting from the Western Zhou Dynasty, every few hundred years, there will always be division, and then usher in unification.

There is not a lot of history of dynasties, especially after Qin, the most dynasties will not exceed 350 years, the reason is very simple.

After the war, the Li people were easily satisfied, the population brought by the war was sparse, and under the huge land distribution, as long as there was no completely deaf and problematic emperor, it was only a matter of time before the great rule was made.

However, with the gradual continuation of the dynasty, problems began to arise in all aspects, corruption, clans and families, more of a rapid population growth brought about by long-term peace, and the land annexation of landlords and nobles accelerated the process, when the distribution was uneven, most of the poor could not survive, unable to maintain a normal existence, the whole dynasty was like sitting on a dynamite barrel, once a little spark was put up, it was a spark that could start a prairie fire.

To put it bluntly, human nature is to live, to find food, hungry beasts are terrible, hungry people are even more terrible, how many tragic stories are happening in the midst of hunger and disasters.

Rations and rations, this is the foundation of a small people, to maintain a Li people's life, a year, need 5 stone of grain, the Northern Song Dynasty has so much land, when the population is huge to a certain extent, it will inevitably cause problems.

Of course, the situation in the Northern Song Dynasty is a little more complicated, the Northern Song Dynasty is a minority, not by the uprising of the peasant army, or the rebellious nobles knocked down, he perished at the hands of foreign races, the Northern Song Dynasty in the later period, and even in the later period of the Southern Song Dynasty, the food problem did not deteriorate to an unbearable extent, but it has to be said that grain is also a huge problem in the current situation of the Northern Song Dynasty.

In this era, the Northern Song Dynasty owned far more land than later generations, with an area of more than 3 million square kilometers, it may be able to develop the land, that is, 14.6 million hectares, according to the appearance of 100 acres of one hectare in the Northern Song Dynasty, this is 1.4 billion acres.

It is this ration field that supports the consumption of the Northern Song Dynasty, according to historical records, the Northern Song Dynasty occupies 1,300 catties of grain per capita, and the total output of grain in the Northern Song Dynasty exceeds 1.5 billion stones, which is a basic plate, in history, such a small area of the Northern Song Dynasty, but has the entire feudal era, second only to the population base of the Qing Dynasty.

As a result, most of the places in the Northern Song Dynasty could recuperate, even have a large amount of wine, and produced a huge number of food-based snacks.

In this case, the largest estimate is that the entire Northern Song Dynasty will feed more than 200 million people at most, which has reached an upper limit.

That was at the best time, now, with a series of disasters in the Northern Song Dynasty, especially in the middle and late stages of Renzong, perhaps because of the influence of the Xiaoice River, the north is getting colder and colder, floods and drought disasters and locust plagues, are also endless, almost every year there are some places out of harvest, so that the frequent appearance of disasters, so that the grain production is greatly reduced, which has threatened the rule.

There are two other methods, one is to develop new fields, and the other is to increase grain production.

In the right place, more fields, which itself is the foundation that the Northern Song Dynasty has always advocated, the silt fields in the south of the Yangtze River is one of them, the silt fields above the lakes and rivers, all are high-quality paddy fields, under the double cropping in a year, at least seven or eight stones of output can be obtained.

Han Qi looked further, Jiangnan is Jiangnan, where is the land of fish and rice, but the most urgent thing is the north, the capacity of the Beijing-Hangzhou Grand Canal has basically been handed over to grain transportation, the increasing amount of grain, and the threat of the north, these two are mixed together, and the power generated has affected stability.

Once there is a large-scale flood, when the Beijing-Hangzhou Grand Canal is cut off, even Bianliang will have a large-scale food problem, not to mention, relying on the entire frontier of Bianliang.

Once Lingzhou's grain production increases to 10 million stones, plus the entire northwest, the northwest will be self-sufficient, which is not just about food.

The pressure of transportation, the reduction of costs, coupled with the stability of the frontier and the volume of thousands of miles, once there is a little problem in any link, it will cause the collapse of the entire northwest situation, but if they produce their own, they can not only ensure stability, but also expand outward.

That's right, a very important reason why the powerful combat power of the Northern Song Dynasty was overwhelmed by the Western Xia was that the northwest was too far away from the central region of the Northern Song Dynasty.

Even if the core of the northwest is Bianliang, but Lianbianliang itself does not have a grain base that can supply Bianliang with a smooth transition.

In this case, the effort spent on transporting the grain that was finally transported from the south of the Yangtze River to the northwest is simply amazing.

In fact, this is also the actual situation in the northwest of the Northern Song Dynasty in the real world, when the Western Xia was not destroyed, it took almost several decades to harass the western part of the Northern Song Dynasty, and the annual military expenditure increased from several million guan to tens of millions of guan, and in the Shenzong period, the annual investment exceeded 20 million guan, which was the key to dragging down the entire Northern Song Dynasty finance.

Han Qi can see this, which is commendable, but he didn't realize that Zhao Xin had already gone to Bianliang to solve this problem, when a 2,000-mile railway unites Bianliang and Lingzhou into one, the importance of this water conservancy project is not as strategic as it used to be.

But even so, it does not mean that this water conservancy project is completely useless, solving the food problem has always been the primary problem of feudal society, no grain is unstable, even in the 21st century, it is still an important issue involving the country, if anyone does not pay attention to it, it will be overturned by the big problem of food.

When Han Qi had not yet returned, such a huge project had already begun, and all the previous preparations, when the materials and personnel arrived, when enough tools were processed in the military's workshop, of course, there were also tools called from the people, thousands of shovels, on the frozen soil, when swaying, countless sweats, making this frozen soil a hot construction site.

On the whole construction site, the personnel are very distinct, with a part of the army, assisted by a small number of technicians, to control these slaves, the technicians through the previous survey, delineated one by one, and the ditches were outlined with white ash.

At this point, I have to say that the benefits of Lingzhou are that in the whole Lingzhou, most of the original Western Xia people are treated as slaves, and there is no dispute over these lands at all.

This is probably the biggest problem in the construction of farmland and water conservancy in the north, although it is said that this is good for most of the land, but occupying other people's land, this will always have to pay some price, and the peasants and landlords do not see the good or bad things, but only take advantage of them.

Therefore, the north can only make up for the inherent water conservancy construction, but in Lingzhou, it can be built with great fanfare.

Any suitable place, a depression that is lower than the Yellow River and easy to drain over, can become a place for future water storage, a lower lying place, or a natural swamp and lake, and even reduce the amount of earthwork in the project.

Perhaps, because of the relationship between the years, the relationship between wind and sand and natural changes, these water conservancy can no longer be used, but these water conservancy systems have been built before, which can give a lot of inspiration to the present, and some can even be borrowed directly.

This is a huge, even not limited to the entire Lingzhou large-scale construction, on the basis of a huge number of manpower and a large number of livestock, on the Hetao Plain, the abundant and dense water network, has become the basis of reclamation, this is already winter, digging is not good, but this is the most correct, but also the most undelayed agricultural time.