In the palace, at this time, Li Er had already convened all the civil and military forces to discuss this matter for a long time, but for the great drought, all everyone could think of was to take advantage of the disaster before it began, and immediately mobilize manpower to dig a well!

By the time Bai Fan and Yuan Tiangang arrived, everyone in the palace had already had dinner, and everyone was waiting for Bai Fan in the Yizheng Palace, looking at the person who Yuan Shenxian had calculated to save him, what was the best solution!

"Boy, presumably Yuan Dao has already explained it to you on the long road, do you have an idea about this matter?" Li Er asked!

Bai Fan looked tired, wiped the sweat on his head, and said, "Your Majesty, I haven't eaten for a day, can you talk while eating!" The drought hasn't started yet, and we'll certainly not be able to talk for a day, so there's no need to be in such a hurry! ”

Everyone laughed, this kid must be very hungry!

Two plates of dim sum, a big pot of three pulp, Bai Fan was not polite, just sat down and feasted!

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

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

Before Bai Fan finished speaking, he only heard a few exclamations below!

"What? Locusts? Boy, this is a big drought, not a locust plague, what? Is there still a plague of locusts?

God, is this to destroy my human race? Li Jiancheng screamed!

Bai Fan saw that it was his father-in-law, and patiently explained, "As the old saying goes, locusts will grow after a long drought!" This drought is unprecedented, will there be no locust plague? ”

Li Jing retorted, "Having said that, can it be concluded just by this sentence? What is the relationship between drought and locust plague? ”

Bai Fan smiled and asked the chamberlain Lao Gao to borrow a pen and paper, and explained to the ministers in public what a locust is!

"Locusts belong to the class of insects, they are oviparous! The rate of reproduction and growth is very fast, if it is not restricted, it will not be long, it will be an overwhelming locust plague!

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

The existence of natural predators is the emergence of nature in order to limit the locust infestation!

The natural enemies of locusts mainly include frogs and birds, especially frogs, which live in the same type of ecological environment as locusts, and where there are reeds and weeds in low-lying land, pits and ponds, ditches, etc., are their good places of survival, so frogs are the vanguard of restricting the habitat and reproduction of locusts.

According to statistics, a frog can eliminate more than 10,000 pests in a summer; A frog eats an average of 50 pests per day, with a maximum of 266 pests; Even a clumsy toad can prey on nearly 10,000 pests in three months of summer!

Locust-eating birds include terns, white-winged gulls, and wrens, especially terns!

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

While telling and drawing pictures on paper to explain, Bai Fan made a cameo appearance as a biology teacher for a while, and began to popularize the knowledge of the food chain to the ministers in Datang!

"Speaking of which, everyone must have been able to guess why when there is a drought, it is often accompanied by a locust plague!" Bai Fan asked!

Everyone thought about it, Bai Fan's words were vivid and concise, everyone understood, even if they had never been exposed to these things, but it was not difficult to understand!

The eldest grandson Wuji was the first to speak, "If you say that, is it because there is no water on the ground?"

That's right, it must be the case, droughts are often thousands of miles away, loess is all over the sky, there is no water source, there are no wheat seedlings in the fields, and there must be no frogs! If there is nothing to eat the locusts, then there will be a plague of locusts! ”

Bai Fan smiled, "Yes, that's exactly the reason!" When there is a great drought, there is no food in the fields, people will be starved to death of thirst, and frogs live on water, and there is no place to drink water, so they will definitely not survive!

Another kind of locust natural enemy birds, also need to drink water, when there is no water source, birds will generally choose to fly away and relocate, so where there is a big drought, where is the time when locusts rise! ”

"In that case, as long as we solve the drought, won't the locust plague disappear naturally?" Du Ruhui asked.

Bai Fan nodded, "Yes, that's the case in theory!" But the reality is cruel, with the existing conditions of Datang today, it is not yet able to completely eliminate the large-scale drought! So ......"

"Boy, even you can't do anything?

Don't you have a good idea for all this research on drought and locust plague? You're never untargeted! Li Er asked.

Bai Fan shook his head, "How can it be so magical, it's just picking up the wisdom of the predecessors!" These teachers have all taught them, and in the future, the academy will also set up a special department of insect biology to study the benefits and harms of insects!

As for this drought, all you can say is to do your best to weaken the disaster to the greatest extent! ”

"Okay, let's see what you can do?"

"My brother predicts that there will be no rain in the next few months, so when the drought comes, we point to the sky and it will not work, so we can only get water from the ground!

There are rivers and seas on the ground, and the huge rivers will be able to withstand the drought and not dry up, so we can use powerful water intake equipment to irrigate the farmland on both sides of the river, which can alleviate part of the drought!

I have a large and delicate tube car and a water wheel here! It is very convenient to take water from such surface water sources, and it will be taken out later, so that the supervisor can vigorously rush to make it! ”

"Good! Later, I will go with you to the prison! ”

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

It's just that the depth is different, and due to the limitations of the well drilling conditions, all we can use now are those shallow wells that are more than ten meters above the surface!

In fact, even in arid areas with little water, there is water 100 meters underground, but our wells can't be dug that deep! Bai Fan sighed.

"Really? The Tang Dynasty has infinite manpower, and I send an army, so I don't believe that I can't dig a hundred meters! "When Li Er heard that there was water, he was arrogant!

Fang Xuanling stopped, "Your Majesty, what we lack 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 for three or five people to build one, not to mention a hundred-meter-deep well, even if we drill it, then a well will be meaningless for irrigation!" ”

Li Er's expression was condensed, he was confused, "Hey! What a pity! ”

Gao Shilian comforted, "Your Majesty doesn't have to be like this, now that the time is still two months, we will immediately requisition the people to dig wells everywhere, and strive to have a well for irrigation in every five households when the drought comes, even if it is good to keep three or five acres of land as rations!" ”

"Hey, that's all there is to it, it's better than nothing! It's a pity that the national treasury has no grain, and if the national treasury is sufficient, what is the need for a major drought!

If one day, I can say that I can feed the people of the world with the country's grain stockpile, it will be enough to laugh at my ancestors! ”

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

Li Jiancheng slapped Bai Fan on the head, "If you have an idea, don't finish it in one breath, hurry up, the people of the whole country are waiting!" ”

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(End of chapter)