Love lasts a lifetime

Teachers and students, after listening to Li Lin's vivid explanation, they felt that Teacher Li Lin was worthy of being a top student who graduated from the Provincial Agricultural School.

The agricultural knowledge is not shallow, and the metaphor is so vivid! Everyone listened with gusto and praised it!

When Li Lin saw the students listening so intently, he continued energetically:"When the corn seedlings grow to the height of a person's waist, the corn must be hoeed for the second time. The purpose of hoeing this time is, first, When applying top-dressing fertilizer to corn, the second step is to cap the roots of corn.

In the past, farmers used diluted manure water for this fertilization. Water the roots because the manure water has been fermented. Watering the roots will not damage the roots. This is the best method. Good scientific fertilization...

But this is only done by farmers on small areas of corn fields, but now it is planted in large areas, so it is difficult to do it. Nowadays, chemical fertilizers are used for top dressing. The advantage of using chemical fertilizers is that corn seedlings grow quickly. , seedlings are strong.

But scientists are still studying whether this will have any impact on the body if people eat such corn.

However, my point of view is that it is safer and more secure to eat food without chemical fertilizers.

I say this, It’s not that I am against the use of chemical fertilizers.

Now, the government calls on production teams to use chemical fertilizers for planting. The advantage is that it can increase food production.

This issue gives students the opportunity to become scientists in the future to conduct research!

When applying chemical fertilizers, students You must remember that chemical fertilizers cannot be applied to the roots of corn, but can only be sprinkled on the soil around the roots.

Otherwise, the corn seedlings will be burned to death, because when the chemical fertilizer encounters moisture, it will dissipate heat and burn the corn roots. Burned out.

Students will definitely ask, if chemical fertilizer is spread on the soil and slowly evaporates, isn't it the same as spreading it in vain?

Because the next step is to put a cap on the roots.

Do you know what capping is?

If you know, please give me some examples hand!"

……

A male classmate stood up boldly and said,"Teacher! Are you afraid that the fertilizer will evaporate? Then you dig up the surrounding soil with a hoe and bury the fertilizer?""

"This classmate is half right. Can you think about the effect of wearing a cap on the roots? Li Lin asked.

The classmate scratched his head with his hand, thought for a while and said,"Teacher!" I have no idea!"

Li Lin asked again;"Which classmate knows? You can stand up and say it boldly!"

……

After a while, no classmates still knew.

Li Lin reminded:"Everyone is harvesting corn. Have you seen that there are many rhizomes growing at the base of the corn root above the ground? If you think about it, you will know why."

A classmate stood up and said:"Teacher! Does covering the roots of corns with soil make them grow more rhizomes?"

"You are right, this classmate can use his brain, but where does the rhizome grow from the root of the corn?"

A classmate said;"It grows from the knots of corn stalks."

"This classmate is good at observing and using his brain, and he is right."

Not only do you need to bury the fertilizer with soil, but you also have to use the soil to gather up the roots of the corn.

Everyone said, isn't this like putting a cap on the roots of the corn?"

When the students heard what Li Lin said, they laughed. laugh it out.

It's true;

Li Lin is really capable, and he not only explains the knowledge vividly and in detail.

We also conduct interactive teaching with students to increase their interest in learning.