Chapter 619 Weeds.

Jiang Yuan looked Pang Jidong up and down. To be honest, he was not as confident as Pang Jidong in terms of the functionality of forensic botany.

Pang Jidong looked at Jiang Yuan with an excited expression, as if to say: See if I guessed it right! I guessed it right!

For the purpose of encouraging teaching, Jiang Yuan asked: "How do you think you can find the burial site?"

"I saw that you used vegetation to find the buried body when you were doing the eucalyptus in Litang Township before?" Pang Jidong asked.

Jiang Yuan was a little stumped by the question, shook his head and said: "That is much easier, it is a judgment within a small range. And I just happened to see it, not looking for it specifically."

"But it should be possible to make a judgment." Pang Jidong has studied for so many days, and it is really not in vain. Moreover, the main direction of his study is how to use forensic botanists, rather than really doing it himself.

Although Pang Jidong knows that what he has learned is difficult, from his current understanding, it seems that Jiang Yuan can do it.

Jiang Yuan looked at the map again, coughed twice, and hesitated a little.

This work is comparable to the investigation, the difference is that the investigation is a group of people carefully searching, fearing that all the previous efforts will be wasted because of missing a point. And using forensic botany to find the body, he can only search carefully by himself, not to mention boring, the work efficiency will not be very high.

The most important thing is that this approach is very difficult, there are few precedents, and if it fails to do its best in the end, Jiang Yuan himself will find it difficult to accept.

"Jiang Yuan, you try it." Seeing this, Liu Jinghui said, and then said: "If you don't do it, you can only find Xu Chu."

"Hey hey hey hey... Why are you talking about something wrong..." Huang Qiangmin didn't say anything at first, but now he couldn't sit still, and hurriedly said: "This is our Ningtai County's own money, don't waste it."

According to the lines drawn by Liu Jinghui, searching and investigating is similar to the investigation of more than 100 kilometers of national highways in Luyang City that year, and the difficulty may be even greater. The advantage is that it is in the county, and it is more convenient to supply, but there will definitely be more trouble.

But no matter how simple it is, Ningtai County can't afford it with only 10% of the cost of Luyang City.

Even though Jiang Yuan sold so many times, he got back all the supplies, and the cash of Ningtai County Bureau is still tight. If it really comes to the time when you have to spend money, there is no way, but for now, it is obviously not so urgent...

Huang Qiangmin held Jiang Yuan with one hand and Liu Jinghui with the other, and said: "Let's discuss it well, don't waste money all the time. Our Ningtai is a poor county, and it is not easy to save a little family wealth. Jiang Yuan, you can use that botany, can it work?"

"Even if it's flying a drone, it's too time-consuming to look at it piece by piece. If I'm alone..." Jiang Yuan said here, looked at Pang Jidong, and asked: "Have you tried to find a botanist?"

"Yes." Pang Jidong nodded quickly, and took the initiative to say: "Do you want to invite him to try?"

"It's best if you can invite him." Jiang Yuan said quickly. If you need someone to help, the situation will be different.

"Sure. I'll make a call. How many people should I invite?" Pang Jidong took out his cell phone.

"A few... the more the better. Can you invite a lot?"

"I've found four or five people now, all researchers from the Institute of Botany, or professors from the school, with a team. Let's see how many can come."

Jiang Yuan was surprised: "I think it's quite difficult for the police abroad to hire experts, and the expenses are not small."

Pang Jidong smiled while sending WeChat and text messages: "How can the police abroad compare with ours? We are the people's police. Moreover, no matter how harshly everyone scolds the experts, these capable botanists are still very idealistic. I told them that they can apply what they have learned. They don't even care about money. They buy their own round-trip tickets."

This part is really something Jiang Yuan has never come into contact with, so he can only nod obediently.

The special case team became busy.

According to the line drawn by Liu Jinghui, the police team released several drones for low-altitude photography. The technology in this area is already very mature. The demolition office that ordinary families often encounter will release drones to take pictures of all the conditions on the ground to prevent people from building randomly or even planting trees and reclaiming wasteland after the demolition notice is issued.

At the same time, Huang Qiangmin transferred the entire police dog squadron to try to use it on the scene.

The experts invited by Pang Jidong arrived as early as noon, which can be said to be a race against time.

In the afternoon, several botanists arrived at the meeting room of Ningtai County Bureau one after another - the meeting room of Zoumadao Police Station was too simple, and Huang Qiangmin felt that outsiders should not misunderstand the working conditions of the people's police.

Jiang Yuan sat in the meeting room very early, watching the screen and taking notes. He greeted the botanists who came in, but did not socialize too much.

Liu Jinghui drew a total of 5 routes, and the area to be seen was very large, and everyone would have a full workload.

The last botanist to arrive at Ningtai County Bureau was Su Lei, a female researcher wearing a professional suit and stockings, tall, with long and thin legs.

As a result, several more people were added to the conference room. The botanist who came in first also politely introduced the situation, saying, "Now is the initial screening stage. Each person will claim an area or line, and then interpret it on the computer. Once there is a result, report it. But it is recommended to record it in a notebook and submit it later. The corpse will not run away."

"Okay." Su Lei agreed, and then asked: "How is your search going?"

"We found a solitary grave, buried three or four years ago. The time doesn't match, it should be buried secretly by a local. We have sent a police officer to find the person." Jiang Yuan answered.

Su Lei was amused: "Is it so interesting to work with the police?"

"I am a policeman." Jiang Yuan pointed to his shoulder badge and introduced himself: "I am a forensic doctor from Ningtai County Bureau."

"I know, Officer Pang said you know forensic botany. In fact, I am quite skeptical. Does anyone really know forensic botany?" Su Lei is a real insider, and the questions she asked are actually very insider. She said: "I think forensic botany is a bit of a pseudo-proposition. Botany involves too much information. It would be too difficult to be a part-time forensic doctor and botanist."

In fact, it is.

If Jiang Yuan didn't have the help of the system, he would definitely not think about challenging forensic botany.

This kind of technology is knowledge that really requires systematic education to master. If you master it before graduation, you will master it. If you can't master it before graduation, there is no hope for it after graduation.

Jiang Yuan couldn't explain his situation either, so he could only spread his hands and said: "Forensic botany is indeed difficult. We are now inclined to look for mature botanists. I am special."

"It is indeed special." Su Lei said as she approached Jiang Yuan.

Before she started working, she walked over to look at Jiang Yuan's work screen and glanced at Jiang Yuan's notebook.

At a glance, she saw that Jiang Yuan had memorized a lot of weeds, such as crabgrass, oxgrass, purslane, and lacquer...

Su Lei understood it immediately and said: "Soil disturbance?"

"Yes." Jiang Yuan nodded.

Soil disturbance will transmit various environmental influences to plant seeds in the soil and induce growth. The principle of this thing is also related to the "seed bank". Seed bank means that the soil contains the seeds of all nearby plants, but when the conditions are not suitable, the seeds are just like in a bank, just stored and not moved, in case of emergency.

When the soil is disturbed, the seeds in the disturbed soil will think that the time has come and then rush to grow.

This is also the principle of vegetation change in the burial ground.

At first, the burial ground will become barren, and then a large number of plants will rush to grow.

Because the most stored in the seed bank are weeds, and weeds also have low growth requirements, so the second indication of the burial ground after the barrenness is weeds.

But in the end, everything will be attributed to competition, and the more competitive plants will eventually cover the burial ground.

One point that must be pointed out is that the plants near the burial ground will not grow very lush.

The law of change is different in each place and at each time, and botanists need to observe and accumulate information.

This is also what Jiang Yuan is doing.

Su Lei only looked at Jiang Yuan's notebook and understood his working mode, and then her expression became serious.

"I choose this one. Line C." Su Lei returned to her position, selected the route, and began to work hard.