Gong Nanhai bought a very cheap piece of land from the county government office a few months ago without any trouble. [Full text reading] As for why such a large area of land close to a river is uncultivated, the Agricultural Committee thinks it is because there is plenty of land in the area and a lack of labor. However, when Wang Tian heard that the "elders" had bought this land, he quickly came to tell Wu Nanhai: The transaction was a loss!
In fact, this land has always been reclaimed by farmers from Fujian, but they always abandon the land after one or two years of cultivation.
"The yield is too low." Wang Tian said, "If you work hard to grow rice, you can get about 70 to 80 kilograms per acre. If you don't take good care of it, you can't even reach this number. If you plant two crops, you will not be able to harvest anything. Two hundred kilograms of rice is not even enough to fill the stomach.
"Seven or eighty pounds?" Wu Nanhai was almost shocked. Seventy or eighty kilograms is just dry grain, and after peeling it will lose another 20 to 30 percent. He knew that the level of agricultural production in ancient times was not high, but based on what he currently knew, ordinary rice fields on both sides of the Wenlan River could still produce a yield of three hundred kilograms per mu as long as irrigation could be ensured.
"I don't know something," Wang Tian said. "It's not easy to farm here. If it doesn't rain, there will be a drought. If it rains for three days in a row, it will fall off immediately. However, even if there is no drought or drought in the United States, you won't be able to harvest much rice."
Wu Nanhai felt strange about this phenomenon, but because he was unable to open it for a while, he did not investigate further. In order to prevent a large area of land from being abandoned, he asked agricultural workers to extensively plant some leguminous crops and green manure for silage on this land, some of which he brought from another time and space. Some were found by remote exploration teams. The result was quite bleak. Except for the yield of Holland, which was barely acceptable, the leguminous crops were almost completely wiped out.
"It seems that this land is seriously deficient in phosphorus. We need to improve the soil
"So the low yield is probably due to problems with the soil environment." Fa Shilu said after listening to his description, "We have not carefully investigated the soil quality and harvesting conditions in the United States and Taiwan.
“Is it possible that the pH value of the soil is too high?”
Fashilu said: "It is possible. Since we are engaged in high-yield and stable-yield fields, it involves the issue of soil improvement.
He picked up some soil at random on the ground and looked at it: "If I remember correctly, the soil in Lingao should be consistent with the main soil type in Jiangxi and Guangdong, mainly brick red soil. In this case, it is relatively easy to improve. It's easier, lime can do it. If you have alkaline soil, you have to look for gypsum.
He rubbed it a little: "This kind of red soil is cultivated from basalt, plus the sand washed down by the river from the upper reaches over the years. Generally speaking, the sand is relatively heavy, but it is not a big problem for rice fields.
While she was talking, Chu Qing came back with a large basket filled with bottles of kvass and kombucha drinks.
"There's no more in the canteen. I'll go directly to the food factory to get it." Chu Qing said with a smile, "I'll soak it in water to cool it down first." As she said that, she carried the basket and walked towards a stream down the slope.
These two beverages have been officially mass-produced in food processing plants, with semi-automatic filling and manual bottle sealing. The bottles are provided by the glass factory and sealed with cork and wax. Due to the lack of preservatives, sugar and citric acid can only be used for preservation, so the shelf life is very short. It doesn't taste that great either.
But for those who were tired of drinking tea and boiled water, these two drinks came at just the right time and immediately became a hot commodity in the canteen. Many indigenous people who bought a bottle out of curiosity also fell in love with their taste. Some simply did it for the purpose of imitating the lifestyle of the indigenous people.
Fa Shilu watched her soak the entire basket into the stream. There are many low hills scattered on the edge of this field. Unlike Tianyang with sparse vegetation, the vegetation on the hills is dense. There are many streams on the ground between the hills, and the gurgling water flows among the green vegetation. Some of it gathers into larger surface runoff and flows into the Wenlan River, some of it gathers into the ponds in the hills, and some of it flows on the ground for a while and then dives into the ground.
"The water source is so abundant!" Fashilu said to himself.
"Have you investigated the water sources here?" he suddenly asked Yan Quezhi. Yan Quezhi was originally staring at Chu Qing's back before he came back to his senses:
"No, geological matters belong to the remote exploration team. I can't even help build houses in the construction company.
"Since you are a hydrologist, you should know something about it. Is the surface runoff here spring water?"
"It's not considered mineral water, but the water quality is very good. The water quality is clear and the water temperature is low." Yan Quezhi said with confidence, "It should be the precipitation that accumulated underground and then emerged."
"That's right." Fashilu nodded and greeted everyone, "Let's go down and investigate the soil conditions here."
Several people walked down the hillside together. Wu Nanhai took his apprentice named Lu Jia who he selected from the school. Lu Jia's family is an official tenant, specializing in school farming. The burden of official tenant farming is very heavy, which is far more difficult than that of ordinary civilian tenant farming. In order to have less mouths to talk to, Lu Jia’s father gave Lu A and Lu B, two brothers, to
"When the Yin Yue Group came, it was just to make a living. Lu Jia was older. He knew a lot of farm work and was smart, so he was accepted by Wu Nanhai as his apprentice.
The group of people dug several exploratory squares at intervals on the wasteland to sample and observe the soil.
"Old method! It's still brick red soil here. It's everywhere," Wu Nanhai said.
"Yes, this is the most common soil in southern China." Fashilu squatted beside the pit. "The fertility of this soil should be good. If you grow rice on such land, you will only be able to harvest less than 100 kilograms. , that’s weird.”
But further excavations soon revealed the mystery of the place's low productivity. They began to dig out large amounts of rusty paddy soil. This kind of soil is caused by long-term poor drainage and irrigation, and there is water accumulation in the soil layer. There are a lot of rusty red hydroxides in the soil. The soil is highly acidic, has low nitrogen, nitrogen, and calcium content, and the soil fertility is very poor.
"Strange, this should be caused by long-term water accumulation." Wu Nanhai said, "But this place is still far away from the highest water level of the Wenlan River in the rainy season."
"The underground water level of this body is high." Fashilu pointed to the hilly area. "The water in the stream eventually dives into the ground. It looks like a plain, but in fact it is like a sponge full of water underneath. It is a typical waterlogging."
Yanquezhi put the equipment up and observed it: "Well, the terrain here can't be felt. It's actually lower than the surrounding places. In addition, the spring water in the hilly area is constantly replenished. The groundwater level is very high, so it forms a A situation of long-term hidden internal contentment.”
"That's right, otherwise there is no way to explain why there is such widespread rusty paddy soil." Fa Shilu said, "Not only did people cultivate paddy fields in the United States and Taiwan in history, but paddy field cultivation was also quite extensive. Finally, it is because of the soil. Only then will the problems be abandoned.”
He said this because paddy soil is essentially a kind of artificial soil, cultivated by annual irrigation of accumulated water in rice-growing areas. There is generally no such soil structure in nature.
"Master, we call this rust paddy field here." Lu Jia interrupted, "There is often a layer of oil-like red rust on the paddy field. In fact, there are some rotten wet fields here, all over the hills."
"Rotten wet field?" Wu Nanhai became interested, "Has your family ever planted it?" "
"No." Lu Jia shook his head, "You will lose money if you farm here.
No one in the county would come here to farm except Fu Lao who came here to open up wasteland without knowing the reason. "
"Let's go and have a look." Fashilu suggested.
Soon they arrived at the ground of a hillside. At first glance, it looked like an ordinary wasteland, but if you look closely, it looked like it had been cultivated, and the ridges of the fields could still be vaguely seen.
"In the past, Fu Lao came to plant here. But in the end, the harvest failed." Lu Jia said, "Water came out of the good fields, and the rice was submerged."
They visited again. The situation here is worse than that there. Water comes out almost as soon as you dig it, and springs will appear in some places. Due to long-term water logging, the soil is oversaturated with water, the soil is extremely dispersed, the texture is heavy and mushy, making it difficult to cultivate, and the soil layers are not clear.
"The fertility of this soil will not be good." Wu Nanhai fiddled with the mud and separated many dead leaves and grass from it. They are all intact, with little decay, and "the organic matter basically does not decompose."
"Because it rotates too much," Fashilu said. "Air can't get in. It's like a closed environment. How can organic matter rot?" He shook his head. "This kind of land is even more difficult to manage."
Wu Nanhai seized this opportunity. Lu Jia was taught for five minutes what organic matter is and why organic matter decomposes. What are the benefits to planting after the decomposition of organic matter? Regardless of whether he understands it or not, just pour the concept into it directly before speaking.
"The key is drainage." Fashilu concluded.
To change this situation, it is not enough to simply improve the soil. The fundamental problem must be solved: internal slander.
"To solve the problem of internal overflow," Yanquezhi said, pointing to the survey map, "we have to expand the size of the drainage channel. The groundwater level is too high. It needs to be lowered to at least 2 meters to be suitable for farming. If necessary, another one must be added. A dedicated water pump is required. The five currently planned drainage branch canals may not be enough, and three more drainage channels need to be added.”
"In this case, your river embankment project is not small."
"The embankments are part of the Wenlan River Basin reconstruction plan," said Yan Quezhi. "According to Ma Du Gong's plan, the water surface of the entire Wenlan River will be raised by several centimeters in the future to facilitate navigation. At present, all along the The river facilities are all in good order according to this plan.”
According to the plan, a riverside dam will be built along the development area to isolate the river water from the entire high-yield and stable-yield farmland area to prevent possible flooding during the rainy season. A gate for the canal will be set up on the river embankment. A steam pumping station will also be installed. , using steam engines as power for irrigation and drainage. If you want to know what happened after the funeral, please log in to 6 Muscles. There are more chapters and support the work!~!
