The Mayans, indeed, did not discount on the issue of compensation, because they were the losing side, and they spent a long time collecting all kinds of plants, most of which were relatively valuable, but unfortunately these precious plants did not satisfy Dingjun, that is, after several times, they were given a cold reception, and after the jar was broken, they found sweet potatoes.

But it doesn't mean that other plants have no effect, it's just that these things have not been drawn by Zhao Xin, when these plants were sent to Dingjun, Zhao Xin found that there were surprises after looking at them.

One of them is that pumpkin, pumpkin is also a huge yield, an acre of land produces thousands of catties, there are not many problems, unlike potatoes and sweet potatoes, starch-rich food crops, pumpkin has a large yield, but can not be eaten as a staple food, he is more as a dish, enrich the residents' vegetable basket.

Pumpkin is also a healthy food, rich in a variety of fiber and nutrients, long-term eating, very good for the body, this can be planted in a small part, diversified rich by-products.

Among the many plants, there is a famous cash crop in later generations, that is, tobacco leaves, Mayans and Indians, the history of smoking tobacco, has been very long, as early as in the primitive society, the Indians have discovered the role of tobacco leaves, but at that time it was just chewing and refreshing, but soon after, began to smoke.

Historically, the earliest recorded picture of tobacco is in a temple built in 432 AD, on which a fresco of the temple clearly depicts tobacco pouches and smoking, which is the earliest history of evidence.

After hundreds of years, or even thousands of years of smoking, the Indians have become very common in tobacco cultivation and smoking, so when the navy asked for plants, the first batch of tobacco leaves were delivered.

From this point on, the Maya is still very honest, and even mentioned his benefits when he sent this thing.

Historically, the Spaniards who conquered the Americas also discovered that the Indians were smoking, perhaps out of curiosity, or by accident, in short, slowly, it became popular.

The charm of tobacco is incomparable, countless people want to quit smoking, but can't quit, this is the root of tobacco in the world.

At this moment, the Dinghai exploration team just sent the tobacco back to the Dinghai Navy with other seeds, and did not pay much attention to this tobacco, and even according to the discipline, the Mayans said that the benefits of tobacco, they did not try it, so, for the time being, in the entire Dinghai control range, tobacco has not yet spread.

The exploration team didn't know that tobacco had such a terrible effect, but Zhao Xin knew that when he received tobacco from across the ocean, he also ate it, although he knew that there was tobacco in the Americas, but did he say that tobacco was in South America, because he didn't smoke, he didn't study the history of tobacco in South America, and he didn't know that tobacco was already a popular activity of the Mayans, and there were many Mayan smokers, especially among the nobles, most of them were smokers.

The unexpected appearance of tobacco is a headache for Zhao Xin, but this thing, if Zhao Xin doesn't open it, in the future, it may be opened by someone else.

After receiving the tobacco, Zhao Xin could only temporarily cultivate and research, but he would not plant it on a large scale, let alone open this Pandora's box, and even in order to ensure safety, he would not even develop the medicinal value.

Tobacco, and even some unique products in later generations, most of them are in the form of medicines, first developed, whether it is Y tablets, or H Luo Y, they were all drugs in the beginning, after the seventeenth century, Y tablets are a very broad spectrum of medicinal materials, almost every doctor, in the face of incurable diseases, will prescribe a little Y tablets.

Later, after discovering the addictive nature of Y tablets, I began to quit, and at the beginning, H Luo Y existed as a withdrawal drug, but I didn't expect the latter to be more addictive, and directly beat Y tablets to the ground.

Of course, tobacco is different from the only product, but in some anti-smoking propaganda, it is even more than the original product, because it is called a legal unique product, and the number of smokers in the whole world is very large, and many people have tried hard to quit, but there is no way.

Tobacco, for the whole world, has always been said to ban smoking, is supported by the majority of people, and even the people of the whole world, there is a recognized idea, that is, agree to ban smoking, unfortunately, the reason why it has not been banned, one is addictive, the general long-term smokers, even if they have the perseverance to quit smoking, will quickly relapse, because it is too easy to get tobacco.

Some people have also proposed to deal with tobacco as a unique product, and even many people have called for that in many ways, the harm of tobacco is probably not inferior to that of a unique product, but there has always been no way, the reason is very simple, nothing more than interests.

In the world, there are many tobacco giants, they have huge profits, tobacco in many countries, is one of the important pillars of tax revenue, some even occupy a considerable share of the tax revenue of some small countries.

No one will give up such a financial resource, although because of more and more propaganda, there are practical examples, but the huge benefits still make it very difficult for many countries to do.

In the huge publicity, there are also many restrictions on tobacco, for example, cigarettes are not allowed to be advertised, on tobacco, more warning signs are printed, or some pictures of some lung cancer patients, etc., these cannot stop the profits of tobacco, which is a super-large, the same, a group with huge interests in all aspects.

Zhao Xin is very clear about the future development, he may study this, and will carry out some promotion in the Botanical Research Institute, but he will not take the initiative to open this, and even in the American part of the Dinghai Navy, some bans will be issued to prevent this tobacco from spreading on a large scale.

It's a pity that these may not be able to stop tobacco, the unique charm of tobacco will affect many people with time, and even spread on a large scale, what Zhao Xin can do is to reduce as much as possible on this basis, and delay the arrival of this time.

In addition to pumpkin and tobacco, there is also an economic harvest is cotton, Dinghai because of the textile industry, large-scale planting of cotton, especially in Central Asia, where is the paradise of cotton planting, not only the territory is vast, the same, a variety of conditions are also very suitable, the annual output of cotton continues to rise, but also let the cotton textile industry continue to expand.

Food, clothing, shelter and transportation, this is the necessary needs of people, and clothing is the first place, out of ignorance, the first thing primitive people do, is to cover the body, on the one hand, to keep warm, on the other hand is shame.

Dingjun has invested a lot in cotton, and has improved a lot, but the yield of cotton has not been high, and it has not reached the yield of later generations, the reason is very simple, the cotton varieties obtained by Dingjun before are Indian cotton, this cotton, in terms of yield and quality of cotton wool, is not as good as the Americas, and the long cotton in the Americas is not only longer in fiber, but also better in fiber, suitable for some high-count cotton cloth, and the yield is higher.

At that time, it was to solve the problem of whether there was any, and now, when this problem is solved, the next step is to breed and survive the fittest, hybridization and a variety of research, to find the most suitable and highest-yield cotton, which is the future, the task after getting cotton.

With the two cotton of India and the Americas, there are two origins, and the next step is to study step by step, find out the differences and similarities, and cultivate, retain the advantages, this is a rather long process, but for the planting area of the Dingjun, even if it is a 1% increase, integrated into the number of acres, it is an astronomical number, let alone more than 10% of the increase.

Of course, of all the plants, including pumpkins, tobacco leaves, and even cotton, all of them are not as good as sweet potatoes.

To be able to become one of the three major crops in North America, as one of the three major crops that jointly change the world's food system, sweet potatoes are definitely a key point, although sweet potatoes have such and such problems, for example, after eating, it is not easy to digest, long-term eating hurts the stomach, etc., but purely from the aspect of yield, it has exploded a lot of things.

In the era of low grain production, in the era of famine, this is God-given food, in ordinary grain products, are 5 stones, to corn is 8 stones, but sweet potatoes, as long as a little cultivation, suitable for China, his output starts at 20 stones, and gradually develops and cultivates, when he finds a key method for planting sweet potatoes, his yield can even be as high as 100 stones.

The Americas deserve to be a plant paradise, even now, there is no development of tropical rainforest plant resources, just the current North America, there has been such a big harvest, it can be said, it is perfect, of course, even the later generations have not thoroughly investigated the plants of the Americas, in the Amazon rainforest, there are countless buried plant gold.

However, those plant golds have not been thoroughly used in the 21st century, and there are countless pharmaceutical companies in the 21st century, spending huge sums of money, more than ten or two billion dollars a year, in the South American rainforest, searching for small molecule substances contained in plants, this era, can not reach the ability of accurate extraction in later generations.

The North American thing has gradually come to an end, the three major crops, only two have been found, but for Zhao Xin, corn is the most important, this important thing, must be obtained, obtained, under the premise of large-scale promotion, it means that the two problems of food and feed have been solved, and now they have got sweet potatoes, which is already very good.

Sweet potatoes and potatoes, these two, basically should be little different, sweet potato yield is a little higher, potatoes are more suitable for the stomach, and can also exist as starch, but these two, almost all of them are large-yield food crops, both are very high-yield.

In the absence of key plants, or when there is a famine, both of these are irreplaceable, as long as a little planting, can solve a large degree of problems, even if there is no famine, it can also be processed, processed into starch, vermicelli, and other products, in short, the range of use is very wide.

In fact, it is also an important role of the three major products in North America, the three major crops in North America are basically known for their yields, one is higher than the other, corn is normal, if you don't count the comprehensive utilization of animal feed, at most it is about twice that of ordinary food crops, but sweet potatoes and potatoes, these two are more terrible than the other, if you look at the output, all of them are monster levels.

You can imagine that before the Ming Dynasty, the yield of ordinary farmers, even the highest paddy fields, was about 4 stones, which was already astronomical for ordinary farmers, and for farmers with only a few acres of thin fields, this was already several times the ordinary harvest.

But in sweet potatoes, potatoes, often 20, 30 stone yield, and do not pick the land, even if it is a little barren, can be planted, it is much more terrible, to put it bluntly, this in the time of disaster, is disaster relief food.

After obtaining the sweet potato, there was no need for the potato, and after understanding the strength of the Maya, and even after a huge war, although it was said that the navy had won, but in the same way, gradually developing southward, a series of large number of ports, once as a springboard, into South America, this is almost non-existent.

Too long a battle line, too much control, too much territory, this is very unfavorable for the Ding Navy, the Mayans attacked the fortress, occupied the upper hand, but will they let the Ding Navy, continue to advance easily, in case of construction period, if there is a war, maybe, it will be a disaster, perhaps, the Ding Navy will have an advantage, but any loss, is not what they want to see.

In this way, the Dinghai Navy stopped, first of all, began to operate North America, the Rocky Mountains are close to the Pacific Ocean, in which, the Mayans may have had cities here, and some layouts have been withdrawn according to the agreement, as long as the mountain passes are sealed, this area can be developed.

Based on the problem of population, the navy cannot, and cannot be, in North America, carry out large-scale development, control the huge land, and produce huge harvests, but it has to be divided into types, if it is placed in the interior of North America, more than a dozen cities, one or two hundred thousand people, I am afraid that even a bubble will not rise, and it will be directly diluted by the huge and huge territorial area, but if this point is placed on the shore of the Pacific Ocean, it will be very suitable, and if this place is reasonably developed, it is needless to say that the benefits will be obtained. It can also support the ports and the control areas of the navy, which will have a huge effect on logistics and a good effect on the entire North American strategy.