Soon the early rice harvest near Gangneung began.

Liu Ba and others even went to the site to calculate the yield, because the newly reclaimed land is too barren, the average per mu is about two stones. Therefore, the research of fertilizers is gradually on the agenda.

For fertilizers, the post-harmonious Liu Cong also did not have much research. However, there are still occasional examples of basic knowledge such as basal fertilizer and foliar top dressing.

In ancient Chinese literature, fertilizers are called dung, such as soil dung, fur dung, etc. Even plants are called manure, wild green manure is called grass manure, and cultivated green manure is called seedling manure. Fertilization is called manure field. The application of fertilizers and fertilization techniques have undergone a process of development.

From the pre-Qin to the Wei, Jin, Southern and Northern Dynasties, there is a poem in the Book of Songs: Ode to Zhou, which shows that the Western Zhou Dynasty had recognized the role of weeds in fertilizing fields after decay. "The Book of Rites and the Order of the Month" says that the use of high temperature and rainfall in summer to rot weeds "can dung the field and can beautify Xinjiang", "Mencius" says "a hundred acres of field, a hundred acres of dung", "Xunzi" says "more manure fertilizer field", etc., fertilizer has been valued before the Qin and Han dynasties.

By the Han Dynasty, the source of farm fertilizer expanded rapidly. The types of fertilizers such as manure (toilet manure), manure (livestock manure), silkworm arrows (silkworm manure) and other excrement, broken bones and other fertilizers have greatly increased. In terms of fertilization methods, the application of basal fertilizer, seed fertilizer and top dressing has been carried out separately. Some of the base fertilizer is scattered in the field, and some are applied intensively in the district field. When sowing, the method of sowing with fertilizer is adopted; It is also used to rot silkworm arrows and human feces and urine as top dressing, and applied to hemp fields.

There are only so many experiences that Liu Ba and others can learn, and the rest depends on Liu Cong's memories. The so-called book is less hated when it is used, and Liu Cong has a deep understanding at the moment.

After discussing with Liu Ba and others, Liu Cong felt that in addition to using human and animal manure, it was also important to cultivate green manure. This is what was often referred to as grass seed in later generations, but rice fields could not be promoted until the winter break. In addition, there is also a special emphasis on planting cash crops on dry land. From planting grain in the field to planting melons, sunflowers and green onions, green manure is used as base fertilizer, and it is known that green manure crops such as mung beans, adzuki beans and turnips can improve the soil and make mulberry trees grow well.

As for the amount of fertilizer according to the quality of the soil, it is a more complicated problem. Inorganic fertilizers such as lime, gypsum, salt and sulfur have also been used. In order to achieve reasonable application, Liu Cong clearly proposed: water cooling in low fields, and the application of lime can warm the soil and benefit seedlings; As fertilizer, it is best to apply hemp and fire manure in seedling fields, but do not use large manure, especially avoid raw manure irrigation; Planting ramie, using donkey and horse dung can generate heat and keep out the cold; Horse manure for planting lilies and leeks is especially suitable; Planting yams, avoid human feces and urine, cow dung, hemp and so on.

In terms of fertilizer accumulation and processing, new methods such as river mud accumulation, cake fertilizer fermentation, burning soil manure and manure should be adopted. In order to preserve the effectiveness of fertilizer, manure accumulation and fertilizer preservation facilities such as manure huts located near farmhouses and brick cellars located in fields have been established. He also asked Li Yan to send people to Jiangling to learn fertilizer making and fertilization techniques.

With the efforts of everyone, the fertilizer source has been further expanded. There are dozens of types of fertilizers, and Liu Cong summarizes them into ten categories: human manure, animal manure, grass manure, fire manure, mud manure, clam ash manure, seedling manure, meal manure, black bean manure, and fur manure. When transplanting rice in cold water fields, the ashes are often dipped in the seedling roots, and it is believed that bone fertilizer has the effect of seedling germination.

The cake fertilizer is mainly hemp cake and bean cake, a small amount of rapeseed cake, big-eyed tung cake, black tree cake, sesame cake, cotton cake, hawthorn cake, sulforaphane seed, dried pork bean cake, etc. There are many types of green manure, and the common ones are rao (yellow flowering grass), barley, broad beans, mung beans, flax, rape, radish, etc. Inorganic fertilizers have also increased the number of species such as alum.

Miscellaneous fertilizers such as silkworm sand, fishy water, rice swill, rice bran, and canned wine mud are used in the cultivation of field crops and fruit trees, vegetables, flowers, bamboo and medicinal plants. In short, all the sundries that can be used are required by Liu Cong to be used in field fertilization experiments.

The Jianghan Plain is crisscrossed by rivers, and it is also a vigorous development of mulberry fish ponds, rice-based fish ponds, cane-based fish ponds and other farmland ecosystems similar to those harmoniously established on the basis of organic matter recycling.

Of course, these fertilizer-making and fertilization technologies can not be realized all at once, Liu Cong only knows the roughly, and briefly lists some outlines and development directions, so that farmers can slowly explore in the future tuntian.

The easiest and most direct way to increase grain is to increase the planting area, so it is necessary to constantly reclaim wasteland, and to make waterwheels to increase the face value of rice cultivation. Fortunately, the population of the Han Dynasty was small, while the Jianghan Plain was large enough.

Liu Cong's research on fertilizers greatly surprised Zhuge Liang, Liu Ba and others. The second son is really well-read. It's just that Zhuge Liang wondered why he hadn't heard of this kind of book. In this regard, Liu Cong only smiled and said nothing, he couldn't say to Zhuge that I was a traverser, we used compound fertilizer in that era, and fertilization was based on the composition of the soil. What nitrogen, phosphorus and potassium will make you dizzy.

With such a wise man as Liu Cong at the helm, Liu Ba was full of confidence in greatly increasing the grain output in the next season, and Liu Cong also instructed Wen Ping to start a new round of conscription after the summer grain harvest was over. You must know that Cao Cao is about to unify Hebei, relying on 8,000 people, no matter how elite he is, he can't stop Cao Cao. Scale is also important.

The days without war passed really quickly, and on the tenth day of August, Liu Cong led the generals to Xiangyang, and during this time he was busy with the affairs of the county, and the time to return to Xiangyang to catch up with the civil and military officials was significantly reduced. Take this opportunity to connect with everyone.

Gan Ning, Wei Yan, Liu Pan, and Huang Zhong, four generals who were preparing to participate in the competition, and Zhuge Liang, Jiang Wan, and Liu Ba, three civil officials who were preparing to participate in the poetry competition, plus Cai Lin, Han Yi, and Liu Cong's personal army, drove to Xiangyang.

This is the first time that Zhuge Liang and his wife, Wen Ping, Gan Ning and others have returned to Xiangyang after following Liu Cong to Jiangling. It was also Liu Pan and Huang Zhongshi who returned to Xiangyang after many years, and it was the first time that Jiang Wan, Pan Rui, and Liu Min entered Xiangyang.

Everyone was quite touched, but the atmosphere was not bad, because Liu Cong was a master, and because of the stability of Jingzhou. It was Liu Cong who changed the trajectory of their lives, and it was Liu Cong who made each of them see hope in this troubled world.

Liu Cong was even more excited, today's Nanjun is at least full of talents among the counties of Jingzhou. And the composition of the staff is gradually becoming more reasonable.

Liu Cong, Liu Ba, Huang Quan 21, Zhuge Liang and Liu Min 24, Wen Ping, Jiang Wan, Huo Jun 27, Liu Pan, Wei Yan, Pan Rui 30, Li Yan and Pang Shanmin 33, Gan Ning 35, Wang Wei and Zhang Bo 41, and Huang Zhong 51 years old.

Overall, they are still a bit young, but according to history, three years later will be the Battle of Chibi, and these people will gradually enter the peak of their lives, the future

Five, ten, or even twenty years will be in a stable and mature stage for a long time! This is also the time for Liu Cong to gain a foothold in the troubled times and dominate the world!

Such a combination will be a good team in the future generations of harmony, and Liu Cong certainly has reason to be excited.

Just when Liu Cong happily took Cai Lin's hand and returned to the general's mansion to meet his stepmother Cai, he found that the atmosphere in the mansion was very strange. Liu Cong temporarily arrested a servant, and when he asked, he learned that the third son, Liu Xiu, had been injured.

Who else dares to fight Liu Xiu in Xiangyang City? Liu Cong couldn't think of anyone who was so bold, so he hurried to the room where Liu Xiu was with Cai Lin at the moment. The room was full of people, Liu Biao and Liu Qi. Liu Qi was reprimanding a group of young people with an angry face.

Liu Cong hurriedly pulled over his little sister Liu Wen and asked what was going on.

It turned out that Liu Xiu and Liu Cong went to Jiangling for a few days and then returned to Xiangyang, and no one cared about him in Xiangyang City on weekdays, but he always liked to pick his nose and eyes at a young age, and pointed fingers at others, young and old. This is a kind of pathology, probably, because the living conditions are superior, so I always feel that I am superior, and my mother died early, but I was left out at home, so I always want to find another way to attract the attention of others.

Over time, it becomes a habit. Originally, in Xiangyang City, men, women and children all sold Liu Biao's face and gave him three points. But today I met Ma's five sons, Ma Yan. Ma Jian has read a lot of books, likes the art of war, but he is so boastful, plus he is young and has no combat experience, and he bragged in a tavern today that he happened to be met by Liu Xiu of the same age.