Chapter 227 The third failure

: Xiao Xu has learned more than you know. I will shock you when I tell you in the future!

Xu Wanning made a large pot of noodles, which was quickly divided.

Not even a bite of the two kinds of pasta sauce was left.

She hasn't even had dinner yet.

"Oops! We seem to have finished all the noodles. Xiao Xu hasn't eaten yet." Teacher Jin suddenly slapped his thigh and screamed.

Immediately, he looked at Xu Wanning with an apologetic look: "Sorry, Xiao Xu, look at the fuss..."

"It's okay, Teacher Jin, I'll just make some for myself later."

"Teachers, if you like it, then I'll just cook it for you in a few days."

Her cooking is not only delicious, but also fast. Just like this hand-rolled noodle meal, it might take other people two or three hours to make such a large portion. It can be done in just over an hour.

Teacher Lu subconsciously asked: "Why can't we do it tomorrow?"

After asking, he patted his head and said later: "Look at my brain, everyone has to take turns cooking, how can I let you do it every time?" What about cooking? Don’t mind, classmate Xu. "

But after eating this delicious meal, how can they eat other people’s food?

Is that called food? That's called wasting food!

"I'll make something else for you to eat tomorrow, with a different taste. Teachers are already busy doing research every day, so just leave the cooking to me. I'm young, so it's okay to suffer a little."

Seeing her like this She said that the other teachers were not polite and gave her the responsibility of cooking.

It’s not that they want to exploit young gays, it’s just that her food is so delicious.

The days passed like this, and in the blink of an eye, a month had passed.

During this period, Teacher Chen and several other teachers have determined the cause of soil contamination based on the directions provided by Xu Wanning.

It is indeed soil salinization.

After discussing with Xu Wanning, Teacher Chen sorted out the four reasons she wrote in his own words and sent them back to the school. The school would then step in and contact other regions to figure out the reasons for soil pollution in various places. .

The climate and environment of each place are different, and the causes of pollution are also different.

"Wanning, have you ever read in the book about the methods of controlling soil salinization?"

"Yes." Xu Wanning handed the information she had written early to Teacher Chen.

"Teacher Chen, these are all summed up by me based on the content in the book and my own study during this period. I am not sure whether they are all correct, so I have to do more in-depth research with Teacher Chen and other teachers."

Teacher Chen looked at Holding this piece of paper full of words is like finding a treasure.

Even if he didn't fully understand the content on it, he was extremely sure that the information on this piece of paper could definitely help them solve this problem.

There is also new progress in the greenhouse.

After a heavy rain one day, the rainwater seeped into the soil along the bottom of the greenhouse. Many vegetables that were about to mature were destroyed because of the heavy rain.

Although Teacher Jin and others were regretful and sad, they still accepted this fact with normal expressions.

After all, this has happened many times before.

They are all used to it.

Xu Wanning looked at several new additions to the experimental data and said inadvertently: "Can we reduce the use of fertilizers and drugs?"

After her words came out, several teachers present turned their attention to her.

Over the past month, Xu Wanning basically spent all her time studying behind the teacher except for cooking and resting. Her seriousness made all the teachers like her very much.

And she can always say an idea that no one has thought of at any time, thus changing the direction of their research.

So now that Xu Wanning spoke, everyone looked at her with burning eyes, looking forward to her next speech.

Xu Wanning smiled sheepishly: "I also got the inspiration from Teacher Chen. Since the soil will be seriously polluted due to salinization and cannot allow farmers' crops to grow normally, then our greenhouses should have the same problem. Are you worried? "

"I used to go to the countryside in Heilongjiang Province, and the waste materials used there were usually very precise. The maximum and minimum amount per acre of land must be within this range to be effective. "If it is too much, it will burn the crops."

"I asked an old farmer at the time, and he said that the biggest concern when applying fertilizer is the accumulation of fertilizer, which will cause the nature of the soil to change, reduce the absorption capacity, and affect the production of crops... ..."

Xu Wanning expressed her views in a way that echoed the thinking of this era.

After listening to her words, Teacher Jin slammed the table.

"I just said that I felt there was something wrong. It was probably because we were using too much medicine."

In order to make the greenhouse vegetables grow well, they used a lot of medicine. It can be said that most of the funds were used to buy pesticides.

The potential for drug harm is also great, and the dominant symptoms are obvious, sometimes invisible, and difficult to detect.

They have a natural dependence on pesticides. They always feel that if they use more pesticides, the crops in the greenhouse will grow better.

In fact, this view was wrong from the beginning.

It's like a person taking medicine even if he is not sick. It is said to prevent diseases, but in fact it changes the person's constitution.

"There is another problem."

"The drainage in our greenhouse is not very good. I heard Teacher Yang mention that this is the third time our vegetables have been destroyed due to heavy rain. Greenhouse cultivation is afraid of drought damage as well as rain damage. I personally think that instead of fertilizer accumulation and pesticide damage, we should find ways to solve the problem of drainage. "

We have considered this problem before and tried other methods to solve it, but as you can see, the results have been minimal. We have a total of six greenhouses here. The two in the northwest were rebuilt after the first rain damage. We also asked the construction department to solve the problem, but

the discussion still failed. Here, there is no way to proceed to the next step.

After all, Xu Wanning didn't specialize in this. She could only tell what she had learned in later generations and try to find a suitable solution.

However, the greenhouse technology of later generations already has a very mature system, and various agricultural tools and pesticides have gone through many generations and reached a high level.

This is incomparable under today's circumstances.

It’s really hard to move even an inch.

Xu Wanning was in an indescribably depressed mood.

She originally thought that she could help people of this era live a good life as soon as possible by relying on the knowledge she learned in later generations.

But what she knows is really just theoretical knowledge.

Once used in reality, there are still many places that fail to meet the requirements.