As the mother river of the Chinese nation, the foundation of the entire Central Plains civilization, whether it was Guanzhong, Henan, or even Hebei and Shandong, these are the most important and historically rich places, almost all of which are in the Yellow River Basin.

The Seven Heroes of the Warring States period a thousand years ago, except for the Chu State, were all deeply influenced by the Yellow River, and he can almost be said to be the starting point of the Yanhuang civilization.

However, after the Tang Dynasty, because of the rapid deterioration of the climatic conditions on the loess plateau, human life has changed the natural environment more and more, resulting in the Loess Plateau, which is a wonder of human beings, and also created the flooding of the Yellow River, which has become a river of disaster, affecting almost the entire Central Plains.

On the high slopes of the loess, in the northwest border of China, the Yellow River has a special significance, the water volume of the Yellow River has increased greatly, in the second half of the zigzag, in Shanxi and Shaanxi, a large number of tributaries have been injected, especially after passing through Henan, the water volume of the Yellow River has begun to increase rapidly.

On the eastern inner side of the entire Yellow River, in the middle reaches of the Yellow River, the most important tributaries, they form a meandering water system, and also form the rich foundation of the Hetao Basin, but this is not all.

In Han Qi's plan, these tributaries were used to form an extensive, dense water network, and when the first resources arrived, a huge amount of heat started a series of large-scale projects in the middle of the tributaries and the Yellow River.

To put it bluntly, the basic farmland water conservancy construction is to build a part of the reservoir in the low-lying place relative to the river channel with the help of the advantages of the terrain, and then, through the ditch, the water of the Yellow River is introduced into these reservoirs, and when the reservoir has enough water, the water can be transported to various places through the ditches in all directions.

Under the premise that there are not enough pumping stations and pumping equipment, it can only be changed through manpower and the natural advantages of the terrain.

Although the Yellow River is relatively low, otherwise, the tributaries will not be able to be injected into the Yellow River, but in the middle of the place, there is not no place with low terrain, and through excavation, as long as the digging is deeper, it can also form a relative drop, which has become the source of water in these ravines.

In this way, as long as the water in the Yellow River is sufficient, water can be injected into these ditches, and when there is water in these ditches, the dry fields can be turned into paddy fields, and the grade of the land can be greatly improved.

The growth of plants is inseparable from all kinds of water, according to calculations, an acre of wheat needs 260 to 400 cubic meters of water, and an acre of rice is as high as 800-1000 cubic meters of water, which is also a change in the north and south of China.

Only the abundant water and abundant water network in the south can support the growth of rice, and if rice is grown in the north, a simple water problem is a huge problem.

There is a shortage of water in the north, and sometimes, during the dry season, it is not known how many lives are paid for the fight for water, and the fight between the two villages is often due to this.

But it was a small river, or even a small stream, that was susceptible, and in the Northern Song Dynasty, because of the lack of rational use of water resources, the Yellow River not only did not stop flowing, but even the amount of water injected into the sea every year was very staggering, conservatively estimated at 100 billion cubic meters per year.

According to the use of 400 cubic meters per mu, this Yellow River water is enough for 250 million mu of fertile land to supply water in the case of complete drought.

It is impossible to have a full-scale drought, even in the most severe time, it is a small-scale drought, not to mention, the existence of average precipitation, most of North China loves more than 400 mm, basically meeting the basic needs of a season of wheat, the only difference is that it is not very balanced, when wheat needs water, there may not be water.

Once the wind and rain are smooth, even the worst land can get a good harvest, and the harvest is the hope of the farmers to survive.

It is not impossible to adjust the wind and rain, but for the farmers in a place, it is too difficult and difficult, and in most cases, watering has become the only way.

In between, it is divided into paddy fields, irrigated fields, and dry fields, needless to say, paddy fields are the most fertile, but also the highest yield, there will be no shortage of water at all, the reason for the formation of paddy fields, or in the southern region, a large amount of rainfall and runoff formed.

Or in the north, near lakes and rivers, they have enough water as long as the lakes and rivers do not dry up.

In these places, there is no need to water, and even in some cases, you have to consider what will happen if there is too much water, and with a little effort, you can achieve a yield of four or five stones under intensive cultivation.

That's right, that's it, as early as the Song Dynasty, some yields were already about the same as before liberation, and before there were no scientific seeds, as long as there was enough water and farm fertilizer, grain crops could grow very well.

Watering the ground is a place where there is water relatively close to the surrounding area, which can be watered by watering to ensure the smooth growth of crops.

Dry land is land that is too far away from water, unless there are some key growth links, it will try to pull some water with a water wheel, or even not water it at all.

Water is the source of life, even the most vigorous weeds, it can even be said that there is no need to grow, without water, can not survive, just rely on the water from the sky, the slightest problem, will reduce the yield, even if there is no problem, the harvest of a year, is also greatly reduced.

This is actually the norm in northern China, most of the land is dry land, can only rely on the sky for food, so most of the yield per mu, less than 1 stone is also the key.

There is water in the water resources and runoff system of the entire north, but the reason why there are so many dry fields is because of manpower.

No matter how industrious the peasants are, they don't have the time and strength to go a mile or two away to get water, and that labor force will die.

Even if it is wheat, in a growth cycle, an acre of land needs about 300 tons of water, with the burden of farmers, how much can be picked, I am afraid, if the grain does not arrive, I will be exhausted to death first.

However, if the ditches are connected to form a series of water networks, it is completely different, and the degree of hard work of Chinese farmers exceeds that of all people in the world, and it is their hard work that has created a glorious Chinese civilization.

As long as a huge network of ditches is built, so that water can be smoothly distributed in the network, the area of one or two miles around the water network can be turned into watered land, which greatly reduces the labor intensity, and for the hard-working farmers, they can fully bear this intensity of labor.

It seems that the yield per mu has increased from 1 stone to 2 stones, or 2.5 stones, but when converted to a large data, this is a terrible data.

Just Lingzhou and the Northwest Fourth Road, you can increase 5 million acres of watered land, so the extra food is very terrible, Lingzhou will solve the food problem in one fell swoop, and become a self-sufficient existence.