Compared with the Central Plains and the south, the Bingzhou region is relatively in an arid and rainless climate, and the Bingzhou belongs to the edge of agricultural civilization, and then to the west and north, the climatic conditions are not suitable for farming, so the north and west of the Bingzhou have entered the zone of nomadic civilization. ¤八¤八¤Read¤Book,.☆.←o

Since it is on the edge of the farming circle, relatively speaking, the natural conditions are much worse, and the Central Plains Dynasty is basically in a state of semi-abandonment of the state, starting from the end of the Eastern Han Dynasty, a large number of Hu people moved inward, and the state has almost become a place where the Hu and Han people live together, and many Han people's arable land has been seized by the Hu people to graze horses and sheep.

If it weren't for Cao Liang's defeat of the Xiongnu, the expulsion of Xianbei, and the complete recovery of Bingzhou, then Bingzhou would have further fallen into the territory of the Hu people in the last few decades, becoming a base for their attack on the Central Plains.

Now that Cao Liang has defeated the Xiongnu and Xianbei and returned the state to the rule of the Han people, it can be regarded as eliminating a catastrophe for the Han nation.

But now Cao Liang is fighting against Sima Yi, who controls most of the Wei State, in one state, and from the perspective of the comparison of forces, there is an extremely huge disparity, so at this stage, Cao Liang can only take a defensive position, preserve his strength in the defense and grow and develop.

The battle of Shangdang repelled Sima Yi's attack, and made a good start for the contest between Cao Liang and Sima Yi.

After he invented and created the Quyuan plow, greatly improved the efficiency of agricultural production, but only the Quyuan plow, it is still far from enough, and the climate of the state is arid, the rainfall is much less than that of the Central Plains, and the south can not be compared, if the normal year, the wind and rain are smooth, the harvest is not bad. ¤八¤八¤Read¤Book,.☆.←o

However, in the event of a major drought, there is a high risk that there will be no harvest, so if we want to maintain stable grain production, we must make a big fuss about building water conservancy.

In this regard, Deng Ai is a good hand, so Cao Liang deliberately transferred Deng Ai out to temporarily take charge of the construction of water conservancy.

The largest river in Bingzhou is the Fen River, which is also the second largest tributary of the Yellow River after the Wei River, and the Fenhe Plain is also the largest plain in Bingzhou, and more than eighty percent of the cultivated land in Bingzhou is concentrated in the Fenhe Plain.

The construction of water conservancy is undoubtedly the most effective means of improving the cultivation conditions of these cultivated lands and achieving the goal of sustained high yields; if we can divert water from Fenshui and the rivers of its tributaries to irrigate the fields, we can safely solve the problem of reducing the output of the major drought.

After Deng Ai received this appointment, he immediately worked tirelessly and traveled around the state to inspect the situation.

Deng Ai was originally an official in Tuntian, if he hadn't met Cao Liang, Deng Ai even thought that he would be in charge of Tuntian's affairs, work for a lifetime, when he was enthusiastic to take a Huainan water conservancy map to Luoyang, I thought I could do a lot, but I didn't expect to meet the then Diannong Zhonglang General Sima Zhao, his own proud plan was abandoned by the other party.

For this reason, Deng Ai was sad and depressed for a while, feeling that his career was completely blocked, but he didn't expect that under Cao Liang's arrangement, he changed careers and became a military general, from Sima of other departments to captain, and now he has become a general of Yuecai, Deng Ai's military talent is fully displayed.

However, Cao Liang obviously still remembered Deng Ai's talent in Tuntian water conservancy, and entrusted him with the task of building water conservancy in the state, and Deng Ai also lived up to his expectations and completed this task brilliantly.

He built many dams upstream of many tributaries of Fenshui, and organized the people to dig many channels during the slack period, so that the river water was channeled into the farmland.

Why will the dam be built in the upper reaches of each tributary, the main reason is related to the technical level of this era, the general river upstream water volume is small, the river surface is relatively narrow, in the winter dry season, the use of stone masonry, you can build a dam, and the middle and downstream of the general water is relatively abundant, with the current technical conditions, want to build a dam in the turbulent river, it is quite difficult.

Therefore, Deng Ai wisely avoided the relatively large flow of the river, so that the difficulty of the project was reduced a lot, and the damming of the upstream of each river, because of the high terrain, as long as a more suitable channel can be built, almost most of the cultivated land can be covered.

Even if the introduced river water flows through a relatively high-lying place, there is a keel waterwheel, and there is no need to worry about not being able to water the ground.

In fact, after Ma Jun invented the keel waterwheel, it was only used in Luoyang and its surrounding areas, and it was not introduced in Bingzhou. At the same time as Cao Liang built the water conservancy, he made the craftsmen build thousands of keel waterwheels, which were placed in the places where they were needed, almost all over the entire Jinzhong Plain, and the scene was magnificent.

In fact, in ancient times, there was no shortage of clever inventors, but due to the isolation of information and the limited conditions for dissemination, many inventions that were originally extremely beneficial to the people have not been promoted.

Like Cai Lun improved papermaking, it stands to reason that paper should be promoted and used quickly, but two hundred years have passed, bamboo slips and wooden slips still have not withdrawn from the stage of history, not only the folk but also a large number of use, even many official documents, are still using these bulky writing tools, I have to make Cao Liang sigh, in this era, the pace is really slow.

You must know that in the next two hundred years, all scientific and technological inventions have already advanced by leaps and bounds, changing with each passing day.

Cao Liang has set up agricultural officials in all parts of Bingzhou, and he has not slackened his efforts in agricultural production and has not reduced his efforts to popularize scientific and technological inventions, not only the zigzag plough and keel waterwheel, but also many inventions and creations that are beneficial to agriculture have been promoted in an orderly manner in various parts of Bingzhou in accordance with Cao Liang's requirements.

This also includes intensive cultivation of production methods, the Han and Wei era of agriculture, basically in a kind of extensive planting, farmers buried the seeds in the ground, and then rely on the sky to eat, no wonder Cao Liang first went to the field to inspect the harvest of crops, was surprised, how such a large field, actually only produced such a pitiful little grain.

At best, there is only a little more than the seeds, and if the crops are due to drought and rain, they will not even be able to get back the seeds that have been put in.

Such extensive planting and thin harvesting not only wastes seeds, but also wastes a lot of manpower and material resources, and if we want to solve the problem of poor grain harvest, we have to work intensive cultivation. 11...Friends who read books, you can search for "blue Chinese network", you can find this site as soon as possible.