Due to the huge difference between the two planes in the speed of time flow by a factor of 24, it is still the evening of July 31 in modern Shijie, but in 16th-century Mexico, it has ushered in a new dawn.

"-Drip-Drip-Drip-"

In the early morning breeze, an agricultural three-wheeled electric vehicle, which should never have been seen in this era, honked its horn and bounced down a path paved along the river beach with sand by the Native Americans.

A native-born Indian Lori curled up on the back bucket of an electric car, crying and screaming in fright.

Then, due to the unevenness of the road surface and the carelessness of the female driver, the electric tricycle suddenly skewed and slammed into a tree on the side of the road. The Indian Lori, who was caught off guard, suddenly slipped on the soles of her feet, and didn't catch the guardrail, and flew out with a "poof" in an instant, just crashing into the arms of the female driver, causing the two to roll in the grass together several times......

“…… Hey, Senior Sister Ma Tong! You'd rather drive a little slower! It's not a smooth road! ”

Wang Qiu, Cai Rong, Wen Desi, and Professor Yang Wenli each stepped forward on two legs and chased after them with a snort. Then there were a few more Indian warriors, who followed at a trot. Because they also had to carry heavy burdens, they were so tired that they were about to foam at the mouth.

-- Because it was written in the history books that Spanish explorers used war horses to scare Indians who had never seen large animals, Ma Tong, who had always liked to be in the limelight, insisted on riding an electric tricycle despite the opposition of others. And little Lolitia, who was curious about this "metal monster", was also fooled into the car by her, intending to enjoy the thrill of the 16th century.

However, the ideal is plump, and the reality is skinny.

There is a distance of about five or six kilometers from the fishing village where Wendesi lived to the central city-state, or capital, where the chief of Avaha lived. If the electric car can go full speed, it will take less than five minutes to arrive.

However, the roads of the Stone Age were so rough that they could not be compared with the roads of the Industrial Age, and even the dirt roads in the countryside of later generations were far inferior - although the width of the roads was about three or four meters, the Indians only cut down the thorns and shrubs that stood in the way, and laid sand in some muddy places. In addition, not only is the road far from smooth, but even the stones have not been picked up.

-- The Indians had no vehicles or large animals, and their roads were only for human traffic, without any consideration for the need to drive.

It must be said here that the civilization of the American Indians has a fatal flaw, not that there are no guns, but that there are no wheels.

The advent of the wheel has completely liberated manpower, and productivity has been greatly improved.

However, the Amerindians did not invent the wheel, and even thousands of years after the birth of civilization, they still knew how to carry it on their shoulders, or drag it with a rope, and in addition to using canoes to transport it.

In fact, the Indians had the concept of a circle very early, for example, the Mayan calendar and many crafts were round. When transporting boulders to build pyramids, the Mayans also knew how to lay logs under the stones. In addition, the Indians of the vast majority of tribes used a horizontal potter's wheel when making pottery, and when it was erected, it was a wheel.

However, because the Indians did not have cattle and horses to use to pull carts, they never erected the potter's wheel and invented their own vehicles. Horses thus became a major advantage for Europeans in their conquest of the Americas.

As for the North American wild horses in later generations, they are all horses that were lost after the arrival of the Spaniards and rebred in the wild. …,

Uh, that seems a bit off-topic.

In short, due to the poor road conditions, Ma Tong's agricultural electric tricycle unfortunately rolled over and hit a tree less than 300 meters from the entrance of the village.

Fortunately, the two people in the car were not injured except for their gray faces.

So he left one Indian warrior to guard the tricycle, while the others continued to march on foot.

――――――――――――――――――――――――――――――――――――

After a distance from the shore, the fresh and cool sea breeze fades away.

Passing through the cornfields outside the village, all sides are hidden in a dense green rainforest, and the air begins to fill the air with a sultry, humid and unpleasant smell, vaguely rotten, reminiscent of the Huangmei days in the rainy season in southern China.

And the buzzing and flying of all kinds of mosquitoes and flies have brought great troubles to people.

Due to the high humidity of the air, after walking for only a few minutes, Wang Qiu, a modern college student who lacked exercise, found that he was already sweating.

――Walking in this hot and humid jungle, you can realize that the Weishenme rainforest is not suitable for human habitation.

Wang Qiu felt a little dry in his mouth, so he opened the military kettle, poured a large mouthful of pure water into his mouth, and then thought silently.

Thankfully, the rainforest is not very wide, and in less than ten minutes, there are large fields of corn and cotton, as well as small vegetable beds with tomatoes, broad beans, pumpkins and peppers.

Many Native American farmers, nearly naked with only a little strip of cloth wrapped around their crotch, were sweating in the fields. Seeing Wen Desi and the others coming, they were all busy bending down or kneeling, and saluted and greeted these "superior people" respectfully.

The tools of these Hungshutizgan peasants were very primitive, and there were no ploughing animals, no plough sticks, only the most rudimentary wooden sticks and stone axes, which were used to dig holes in the soil and sow all kinds of crops, while stone axes were used to cut down trees and clear the ground, and to clear weeds.

In general, their labor is very inefficient.

To make matters worse, corn is a drought-loving crop, and growing corn in low-lying jungles with abundant rain means that the water in the fields must be drained frequently, resulting in a dramatic increase in labor and yields.

As a result, the yield of corn in this area is pitifully low by modern standards - according to Wen Desi, if calculated in Chinese acres of mu, about 100 kilograms of corn can be harvested per acre...... In later generations, most of the improved corn can easily reach a yield of more than one ton per mu when the chemical fertilizer is sufficient!

Although he has been here for about 20 months, he has no way to conjure up a large number of metal tools out of thin air to improve the labor efficiency of these people. As for the jishu who built small dams and irrigation canals, these Indians had long been so skilled that they did not need his guidance at all.

However, in the previous period, he racked his brains to provide a major innovation for the country's agricultural jishu.

-- That's soil fertilizer.

Just as Wang Qiu and the others were slowly walking through this farmland, they saw several farmers carrying a huge clay jar coming towards them, and there was a person holding a gourd scoop next to them, constantly splashing a pungent smell of turbid liquid into the farmland.

Wang Qiu and Ma Tong didn't react to this, but Cai Rong and Professor Yang Wenli couldn't help but say "huh" when they saw this. Professor Yang couldn't help but start whispering in his mouth, "...... That's not right! When did the Indians have this kind of jishu? ”…,

When he saw it, he introduced them to them quite complacently: "...... Hehe, don't be surprised, this kind of soil fertilizer practice is what I taught them. In my hometown in the north, due to the high price of chemical fertilizers, until the 90s of the last century, the villagers in the countryside were still using soil fertilizers, so I have some understanding of this aspect.

There are two kinds of soil fertilizers in our hometown. One is ammonia, the raw material is fresh cow dung, cooked gypsum powder, the two in a ratio of ten to one, sealed at room temperature for three days, and then mixed with water can be used; The other is ammonium sulfate, which is made of human urine, water, and cooked gypsum in a ratio of 10 to 5 to 1, mixed and closed for ten days, and then can be taken out and used.

Because in ancient Mesoamerica, there were no animals except dogs, so I had to try to produce the latter kind of ammonium sulfate. Hehe, I didn't expect it to be successful in one go! After spreading it in the corn field, the yield per mu has increased by half! ”

“…… Well, it's no wonder that everyone here is so respectful to you, it turns out that you have come up with such a powerful innovation! ”

Ma Tong smiled and punched Wen Desi on the shoulder, and Wang Qiu also gave a thumbs up in admiration - if it was him who crossed over, I am afraid that he would definitely not be able to make this kind of jishu progress that can work immediately.

Think about it, if you can increase the grain yield per mu by half, you should at least have the status of the great druid Yuan Longping in society!

“…… However, just eating corn as a staple food is probably not good for your health! We have brought you a lot of rice and wheat seeds this time, so why don't you have them sown and try it! ”

After thinking for a while, Wang Qiu persuaded Wen Desi again.

-- Corn is one of the great contributions of the American Indians to shijie, and it is also the highest grain crop per unit of shijie except for sweet potatoes (which are also inventions of the Indians). In addition, corn is very adaptable and can grow in difficult conditions such as drought and barrenness, and it can be called a hardcore crop with good seeds and guaranteed harvests, so it is widely cultivated throughout Shijie.

But the problem is that the unit yield of corn is high, and there is another layer that is not very good, that is, the nutrient content is insufficient.

The reason why corn has become a healthy food today is because it can play a role in supporting the stomachs of fat uncles and fat aunts, and prevent fat people from overeating nutrients. Before the Industrial Revolution, when the common people were generally short of food and clothing, and those who ate corn were usually poorer in physique due to insufficient nutrition.

Of course, the seeds of high-yielding crops brought from later generations are not without problems. For example, their high yields last only one generation, and these crops are very labor-intensive, requiring large quantities of chemical fertilizers that were impossible to produce in ancient times...... However, under the huge golden finger of the space-time portal, none of the above problems are a problem at all for the time being.

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