Cultivated land naturally has a deeper level, it is not as simple as it seems on the surface, at the beginning, when Ren Hai had not learned those experiences, he actually felt that cultivated land was just like cultivating the land, it was nothing more than turning over the ground or something.

Now they are similar to their own thoughts at that time, and Ren Hai doesn't feel anything.

"Yes, ploughing land is not as simple as you think, then you be quiet, I will say, when you speak, you have any questions in your heart first, and after I finish speaking, you are asking me in detail about your doubtful questions." Ren Hai said the rules for a while, and then after taking a look, he started.

"Cultivated land, cultivated land, literally, is naturally simply the word cultivated land, there is nothing to say, but to go deeper, we have to talk about it from the method of cultivating land, and in combination with the situation at that time."

"Cultivated land is divided into several ways, deep ploughing, clear tillage, shallow tillage, tillage, these farming methods, all have their unique advantages, there are certain drawbacks, the main thing is to see everyone use, according to the situation at the time to use these advantages and disadvantages, find the most suitable advantages and disadvantages, and then to find the most suitable way on the line."

"What is Qing Ploughing!" A voice suddenly sounded in the crowd, and because the scene was already quiet, this time, the sound was particularly abrupt.

The voice was the voice of a child, and everyone immediately looked at the child, and the father who was holding the child, this man was the one who just said that he had brought his son, and that his son had a very good memory.

At this moment, the father began to get nervous, and then began to reprimand his child.

"Minister Ren, I'm sorry, my child is still young, please let him go." This father's posture is very humble, even in the face of Ren Hai, who is now somewhat amiable, but it is still the case, after a long time, some things belong to the subconscious state.

"You... Come out and pick up the baby. Ren Hai looked at the father holding the child with a serious expression, his voice was full of seriousness, and he actually interrupted himself to speak, which must be punished.

"Minister Ren, Minister Ren, I will take care of anything for my child, and I hope Minister Ren will not embarrass my child." The father walked out as he spoke, and then stood in front of Ren Hai, but he didn't get close.

In this crowd, only Yang Yi and Lei Qiang looked at Ren Hai with a smile, and there may be only two of them who understand Ren Hai.

"What's your name?" Ren Hai asked.

"Back as minister, my name is Liu Tiesheng." The father said, when he spoke, his tone was still full of worry, but this worry was obviously better than before, usually if you want to be executed directly, it will not take so much effort at all, and you will often be executed directly, in this case, it means that Minister Ren may only be slightly punished.

Thinking of this, Liu Tiesheng's trembling body was much better.

"I didn't ask you, I'll ask your son again." Ren Hai just pretended to be angry a little and said.

"My name is Liu Hope, and my father said that I am the hope of the family, so he named me Liu Hope." There is still some immaturity in the little boy's voice, but there is a kind of agility in his eyes that many people do not have.

This may be because the family's expectations for him are relatively high, this kind of little boy, in the future, the motivation to move forward is much stronger than most of his peers, which may be a certain motivation brought by this name.

"Well, that's good, it's called Hope, then I want you to be the hope of your family." After Ren Hai finished speaking, he looked at this Liu Hope, and then spoke again: "You just asked what Qinggeng is, then I'll ask you first, why are you asking that?" After Ren Hai finished asking, he looked at Liu Hope quietly, wanting to hear the answer from his mouth.

"Because I haven't heard of it, as for deep cultivation, I've heard of it, but I haven't heard of it." Liu Hope said it very honestly.

"Well, okay, it's good to have questions, but pay attention to the rules I just said, you can't ask questions until I'm done, and in order to show punishment, I'm going to let you be my assistant, and you can do whatever I ask you to do, okay?" Ren Hai said to Liu Hope.

"Okay." Liu Hope said very dryly, and then a happy expression appeared on his little face.

His father Liu Tiesheng also breathed a sigh of relief after hearing this, where is this punishment? This is Minister Ren planning to take his own son, I can't see this, then I can go home to wash and sleep.

After hearing this, the people in the crowd did not express their dissatisfaction, they didn't dare to really touch the minister's brow for this opportunity, this time it was handled like this, and next time who knows how to deal with it?

"Okay, then let's start talking, deep ploughing, simply put, is the depth of the cultivated land is relatively deep, this method is often aimed at the beginning of spring, with the use of base fertilizer..."

Ren Hai introduced the use of deep ploughing, as well as his advantages and disadvantages, respectively, and then introduced shallow tillage and medium tillage.

"Okay, I'm done with my content, now let's talk about Qinggeng first." After Ren Hai finished talking about what he wanted to say as a whole, and then said in combination with everyone's questions, this Qinggong must be what everyone is more confused about.

Because as the little boy said just now, he has heard everything else, but this one has not been heard, that's all, although Ren Hai has just explained it, it is incomplete after all.

"The so-called clear tillage, as I just said, is to completely plough the land, everyone will be curious, deep ploughing is also, in fact, there is a certain gap, clear tillage is actually in the management, no matter what weeds grow, will be cleaned up completely, that is, let the land be in a state of no plants for a long time."

"The use of this is very rare, mostly used in some areas with serious diseases or serious insect infestations, simply put, a piece of land breeds a disease, planted year after year, not only can not make a profit, and even there will be a big loss."

"Why is this happening? It is nothing more than a serious disease, which leads to an increase in costs, and at the same time the yield is not up to standard, and even the quality of agricultural products is not enough, these are the reasons for losses, so what role does tillage play? ”

"I'll give you a brief explanation, starting with the disease, adding a piece of land is because of the disease, this disease will be called a fungal disease for the time being, this disease tends to evolve according to the pesticides you spray every year, and it will be more difficult to treat in the second year, and you need to use more drugs, or even more poisonous drugs, and the reason why this fungal disease is difficult to treat is that he can successfully survive the winter or even summer."

"And their place is on weeds, dead branches and rotten leaves, once they are cleared, they can not grow plants for a long time, so that their living space is reduced, and they can naturally curb the reproduction of fungal diseases to a certain extent."

"I say this, it's not absolute, this situation is not much, everyone should just understand, there is no need to understand this matter, generally speaking, as long as deep ploughing and cultivating are used well, a large number of problems can basically be solved." Ren Hai said a lot in one breath, and roughly explained all the characteristics of this Qing cultivation, and after finishing speaking, he listened quietly.

"So there are so many exquisiteness in this cultivated land?"

"Yes, yes, there are so many things to cultivate, I don't know until now."

The crowd was talking.

"Now you can ask questions." Ren Hai said softly, and then waited quietly.

There was a moment of silence again, and no one took the initiative to ask questions.

"Well, may I ask a question?" Suddenly, a voice came from Yang Yi's side, and Ren Hai took a closer look, it was the person Yang Yi brought.

Yang Yi didn't pay attention to that person, just listened quietly, because of this kind of thing, he didn't need to interfere.

"Of course, just ask." Ren Hai said.

"Minister Ren, as you said just now, in addition to removing weeds, cultivating also has a certain moisture preservation effect, I don't understand very much, isn't it that the water volatilizes faster after the cultivation is completed? Why does it still have the effect of preserving moisture? The man asked in a faint voice.

After Ren Hai listened, his eyes lit up, it seems that the power of the people is still great, everyone gathers a little more wisdom, and the whole together is a huge wisdom.

"What's your name?" Ren Hai asked, this kind of person, he needs to pay attention to, although this kind of person for some things, not very clear, Ren Hai does not know everyone's situation, but can find this kind of question, although not necessarily the strongest, but definitely talented, Ren Hai always believes that the biggest problem is not to find problems, the biggest problem is that there is no problem, this is also Ren Hai's code of conduct.

"My name is Li Ming, and I am the minister." Li Ming's voice still seemed a little shy, and at the same time there was some weakness.

It's not manly, but Ren Hai doesn't care about this, he just needs to be talented.

"Are you interested in coming to me, I can teach you more." Ren Hai suddenly opened his mouth and said, this person is much better than his own Li Tiezhu.

"Alas, alas, without this, how can you poach my people in front of me." At this moment, Yang Yi couldn't sit still, although he didn't know why Ren Hai did this, but it was obvious that the Li Ming he recruited must have bright spots, and he already had a little idea of wanting to compare with Ren Hai, how could he let it go.

"Okay, I won't rob you, but if you have any questions, you can come and ask me." Ren Hai's first sentence was said to Yang Yi, and the second sentence was said to this Li Ming.

"Then I'll talk about why cultivating can protect moisture." After Ren Hai finished speaking, he looked at Liu Hope, and then said to him: "You go find two containers of the same size, and then fill them with half of the dry soil in each." After Ren Hai finished speaking, he took out a bucket of water from the void and waited quietly for Liu Hope, everyone saw this, and obviously guessed something, this minister is going to use it for experiments

This kind of thing, they have seen before, and they don't think it's new at this time.

Soon, Liu Hope found two identical bottles of mineral water, and cut them neatly, exactly the same, and filled them with the same height of dry soil.

"Well done." Ren Hai gave a word of encouragement, and then poured the exact same water into the bottles.

"Seeing this or not, it's equivalent to imitating the soil environment in reality, and then I'll leave this and put it in a cool place, and then everyone can observe it later." After Ren Hai finished speaking, he put the two containers in a cool place.

"Due to time constraints, we don't have time to wait for the results of this experiment, so I'll just say it first, and then you can observe it later, and if you have any questions, you can also come and ask me."

"Look, I'm sprinkling a layer of dry soil on top of one of them, and this container is equivalent to cultivated land."

"Generally speaking, if the land is not cultivated for a long time, a very small capillary will be formed between the soil, and these pipes will let the water in the lower layer evaporate all the way to the outside. Ren Hai said as he spoke, and then began to do some practical operations on the side.

"In fact, this principle is the same as when I just sprinkled some dry soil in a container, in fact, I have a problem with this operation, I should wait until the soil in the container forms a capillary, and then water, and then sprinkle dry soil, but the time does not allow, I will ignore this step, anyone who is interested can try."

"This principle of tillage, in fact, is the same as sprinkling hay on the soil, which is to achieve a moisture preservation effect, can I understand this?"

Ren Hai asked, but seeing everyone's expressions, he could guess a rough idea, and everyone still didn't understand much, but it didn't matter.

"You just need to know this principle and then experiment with it, as for this principle, it doesn't matter if you can understand it and if you can't understand it."

"Okay, do you have any questions?" Ren Hai asked again.

....

It wasn't until the evening that everyone ended the lecture, Ren Hai and Yang Yi returned to the small courtyard, during this period, everyone asked a lot of questions, some about vegetable planting, and also about rice planting, all kinds of questions were overwhelming, but as long as Ren Hai knew and understood, they all answered, but it was okay, everyone who listened to it understood more or less.

Along the way, Yang Yi and Lei Qianggao also asked Ren Hai what to plant on the newly reclaimed wasteland, and Ren Hai also explained them one by one.

Newly reclaimed wasteland, there is an obvious lack of soil fertility, there will be a certain crop growth of poor situation, finally Ren Hai recommended Yang Yi to plant a crop of corn or beans first, these crops are field crops, easy to manage, and have a good effect of land cultivation.

Whether it is corn or beans, it itself has a kind of nitrogen-fixing rhizobia, even if the soil is insufficient, it can still be planted, not particularly affecting the growth, not like other crops, the harvest is very low, or even no harvest.

When all the communication was over, they also went to the small courtyard, and after dinner, they went to bed.