In the palace, Li Er had already summoned all the civil and military officials to discuss the matter for half a day, but for the severe drought, everyone could think of it, taking advantage of the disaster and immediately mobilized manpower to dig a well!

By the time Bai Fan and Yuan Tiangang arrived, everyone in the palace had already had dinner. Everyone in the Political Affairs Hall was waiting for Bai Fan to see what good deeds were there for the rescue man Yuan Shenxian calculated!

"Boy, I guess Master Yuan has already explained it to you on the way. Do you have any ideas about this?" Li Er asked!

Bai Fan looked tired, wiped the sweat from his head and said, "Your Majesty, I haven't eaten for a day. Can you talk while eating? The drought hasn't started yet, so we must not have been chatting for a day, so don't be so anxious!"

Everyone laughed. This kid must have been very hungry!

Two plates of snacks, a large pot of three pieces of juice, Bai Fan was not polite, so he just sat down and feasted!

"If you think about it carefully on the road, you must prepare for this major disaster in two steps. The first step is to save the drought first. If it cannot be eliminated, try to weaken the impact of the drought!

The second step is to prepare to treat the next locust plague,..."

Before Bai Fan could finish speaking, he heard a few exclamations below!

"What? Locust plague? Boy, this time it is a severe drought, not a locust plague, what? Is there a locust plague about to happen?

God, is this going to destroy our human race?” Li Jiancheng screamed!

When Bai Fan saw that it was his father-in-law, he patiently explained, "The old saying goes, long-term drought will lead to locusts! This severe drought is unprecedented. Will there be no locust plague?"

Li Jing retorted, "With that being said, can we conclude just by saying this? Is there any connection between drought and locust plague?"

Bai Fan smiled and borrowed paper and pen to the eunuch Lao Gao, and explained to the ministers in public what locusts were!

"Locusts belong to insects, which are egg growth! The reproduction speed and growth rate are very fast. If there is no limit and the time is not long, it will be a plague of locusts!

But heaven and earth have their own wonders. Because of this, locusts also have natural enemies!

The existence of natural enemies is what nature appears to limit the plague of locusts!

The natural enemies of locusts are mainly frogs and birds, especially frogs, which live in the same type of ecological environment as locusts. Low-lying areas with reeds and weeds, ponds, ditches, etc. are their good places to live. Therefore, frogs are the vanguard that restrict the survival and reproduction of locusts.

According to statistics, a frog can eliminate more than 10,000 pests in one summer; a frog eats an average of 50 pests a day, with the highest number of up to 266; even a toad with a dumb body can prey on nearly 10,000 pests in three months in summer!

Birds that eat locusts include swallow plucks, white-winged floating gulls, field pisces, etc., especially swallow plucks are the most prominent!

During the brooding stage, birds need to prey on a large number of locusts. Taking ordinary swallows as an example, a pair of kisses and a nest of chicks can eat more than 16,200 locusts per month!”

While telling and drawing pictures on paper, Bai Fan played a guest appearance as a biology teacher for a while, and began to popularize food chain knowledge to all ministers in the Tang Dynasty!

"At this point, I believe everyone can already guess why droughts are often accompanied by locust plagues!" Bai Fan asked!

Everyone was thinking, Bai Fan’s speech was vivid and concise, and everyone understood it. Even if they had never been exposed to these things, it was not difficult to understand!

Changsun Wuji was the first to speak, “Is it because there is no water on the ground?

That’s right, it must be like this. Droughts often have thousands of miles of land and loess all over the sky. Without water sources, even wheat seedlings in the fields will not grow. Then there will be no frogs! If there is nothing to eat locusts, then a locust plague will form!"

Bai Fan smiled and said, "Yes, that's the reason! During a severe drought, if there is no grain production in the fields, people will be starved to death and thirsty. Frogs make a living by water and have no place to drink water, so they will definitely not be able to survive!

Another type of bird that is natural enemies of locusts also needs to drink water. When there is no water source, birds generally choose to fly away and relocate. Therefore, wherever there is a severe drought, it is when locusts rise!”

"If we say so, as long as we solve the drought, will the locust plague naturally disappear invisible?" Du Ruhui asked.

Bai Fan nodded, "Yes, it's the case in theory! But the reality is cruel. With the current conditions of the Tang Dynasty, it is still impossible to completely eliminate large-scale droughts! So..."

"Boy, there's nothing you can do about it?

You don’t have a good idea to study droughts and locust plagues so much? You never aimlessly!" Li Er asked.

Bai Fan shook his head, "It's not that magical, it's just picking up the wisdom of our predecessors! These masters have taught us, and the academy will also specialize in insect biology, specializing in studying the interests and harms of insects!

As for this severe drought, I can only say that I can do my best to minimize the disaster!”

"Okay, let's talk about what you can do?"

"My senior brother calculated that it would not rain in the next few months, so when the drought came, we pointed to the rain from the sky and couldn't do it, so we had to get water from the ground!

There are rivers and seas on the ground. At that time, the huge rivers can withstand severe droughts and not dry up. Can we use powerful water intake equipment to draw water from rivers and irrigate the farmland on both sides, which can alleviate some drought!

I have a large exquisite tube truck and water truck here! It is very convenient for water withdrawal of such surface water sources. I will take it out later so that the general manager can vigorously rush to make it!"

"Okay! I will go with you later to be the supervisor!"

"In addition to the water source on the surface, there is also the water source on the ground. It can be said that there is a large amount of water underground, which is enough for Chinese people to drink and irrigate!

However, the depths are different and limited by the conditions for drilling wells, what we can now use are only shallow wells more than ten meters away from the surface!

In fact, even in arid and low water areas, there is usually water for a hundred meters underground, but our wells cannot be dug that deep!" Bai Fan sighed.

"It's true? The Tang Dynasty has endless human power. I don't believe that I can't dig a hundred meters!" Li Er was so proud that he heard that there was water!

Fang Xuanling stopped him and said, "Your Majesty, no, what we lack the most now is time. Even if it is an ordinary ten-meter-deep well, it will take at least ten days and half a month to build one. What's more, a hundred-meter-deep well. Even if we drive it out, a one-deep well will be meaningless for irrigation at that time!"

Li Er's expression was condensed, because he was confused, "Oh! What a pity!"

Gao Shilian comforted, "Your Majesty, you don't have to do this. Now there are still two months left. We will immediately recruit people to dig wells everywhere, so that when the drought comes, every five households can have a well to irrigate, and even if three or five acres of land is preserved as food, it will be good!"

"Oh, that's all, it's better than nothing! Unfortunately, the national treasury has no food. If the national treasury has enough stocks, how can a severe drought be a big deal!

If one day, I can say that I can support the people of the world with the national treasury, it would be enough to smile at my ancestors!"

Bai Fan pondered for a moment and said, "Actually, we still have enough time now, and there are still many ways to prepare in advance!"

Li Jiancheng slapped Bai Fan on the head, "I have an idea and say it in one go. Hurry up, the people of the whole country are waiting!"

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Chapter completed!