"Boy, guess what I'll bring you back?" Daddy mysteriously took out a cloth bag and said.

"I know you can't guess, you see." Daddy excitedly unwrapped the cloth bag, "This is a picture." Yang Heng felt strange, what did Dad do with some picture scrolls.

"What kind of picture, you don't know how to learn this book." "Books, aren't they books one by one?" Yang Heng was a little confused, this is indeed Yang Heng's mistake, the books of this era are about volumes, whether it is bamboo slips, silk books, or paper books, they are all rolled up.

"What is this called, this is the book, but I exchanged a few prey for it, I don't believe it." Dad picked up a scroll of paper, untied the red rope tied on it, and slowly unfolded it, "Look, aren't these all words, how can there be any paintings?" ”

"Volume 6 Sheep Felt and Crisp Cheese ......" manuscript, what is this, first, first, Yang Heng began to flip through these paper rolls, oh, this is the first, I saw a capital word written on the outside of the paper roll, untied the tied rope, and slowly unfolded.

"Qi Min wants to be skilled, and the preface to the history records says that Qi Min has no cover...... Gai Shennong is a ...... for the elderly, "This is actually Qi Min's technique, a book of agriculture, but there is one place, Yang Heng does not know many words on it, they are all some traditional characters."

"Grandpa, where did you get this book, this book is amazing, it is a book that explains how to farm, Grandpa, you are so good, and you want to get a book for the child to read." Yang Heng was a little excited, and he was a little incoherent for a while.

"It's useful, grandpa is still afraid of uselessness, this is grandpa went to a veteran's house to be a guest, he took it out to show me, said what was the trophy in a certain battle, he didn't rob others at that time, there was only such a burden of books left in that place, he had to take it back, how could he know how to read, so he kept it there, and even almost burned it, no, I remembered that you like to listen to other people's lectures, so I gave you a few prey in exchange, you can use it, then I will rest assured, I didn't waste some prey in vain."

"It can be used, it can be used, Xie Lu Xie Grandpa, Xie Lu Xie Grandpa." "What do you say, you are my son, I am your Laozi, you like to read, you Laozi, I will change your books and come back, isn't this how it should be." Daddy scolded.

It can be seen that Yang Heng's understanding of his father has taken another step, and his father is not so ruthless.

"Grandpa, what else did you bring back, wouldn't you just bring back such a book?" Yang Heng was very curious.

"Stinky boy, are you worried about Grandpa bringing you food, don't worry about you having something to eat." Daddy turned around and walked out, and then brought in a big cloth bag, "Grandpa, you brought so much food back." Yang Heng was surprised.

"How can it, ah, this is for you, lady, this is yours." Yang Heng got a small cloth bag, while the old lady's was a piece of cloth. "What is this, pie." Yang Heng said with some disappointment.

"This is Hu Cake, you have eaten it before, and you still say it is delicious, why, eat meat, I don't like it." "I like it, I like it, why don't I like it, it's just that I haven't eaten it in a long time." Yang Heng hurriedly explained, no matter whether it is delicious or not, this is a piece of Dad's heart. "If you don't like it, you don't like it, your grandpa bought this for easy take, isn't it, you stinky boy, you can't lie, don't you often buy it for you when you're in the city." The old lady laughed and scolded.

"You see, I have also bought some grain for planting, and whether this field is successful or not, this kind of seed still has to be bought." Then Daddy took out a few more packets of seeds from the cloth bag.

"This is millet, this is millet, this is rice, and there are some legume seeds, which are said to be fertiliser, and I don't know if they can be planted or not." Dad is indeed not a farmer, and now he won't even buy seeds, this rice should be rice, Yang Heng seems to remember that there is no upland rice in this era, (at this time, Yang Heng is a little wrong, upland rice should be there at this time, but there are not many plantings) Look at the barren mountains here, how can you grow rice, but what is millet and millet, Yang Heng opened the cloth bag and observed, only to find that millet is yellow rice, and millet should be a crop such as sorghum in later generations, but it is a little different from sorghum.

Beans, which look like mung bean seeds, are they used to fertilize the field? When Yang Heng checked Qi Min's technique, he realized that this mung bean was really used for fertilizing the field, and Qi Min wrote in the technique, "In the method of all beautiful fields, mung beans are the first, and small beans and flax are second,...... For the spring grain field, then the mu harvest ten stones, its beauty and silkworm arrows, cooked dung the same.

It can be seen from this paragraph that this mung bean is used as fertilizer, and Yang Heng also remembered that he had read some online articles in his previous life, which contained the saying that mung beans were used as fertilizer, and it seems that the source is here.

Even Yang Heng in the countryside in the previous life has a saying that soybeans and corn are interplanted, corn can use the rhizobia on soybeans to increase production, it seems that this mung bean is also this effect, but here mung beans can not harvest fruits, but after the bean seedlings grow into the field, and then plant grains in the next year, according to Qi Min's technique, this effect is good, it can reach a yield of ten stones per mu, and I don't know whether it is true or false, this can be tested, but it is just a consumption of two or three liters of mung bean seeds, and it doesn't matter if the field arrives, In this era, due to the lack of fertilizer, it is generally a one-year field to be planted, and the land must be rested for a year, and the planting is in turn to facilitate the rest of the field.

Thinking of this, Yang Heng suddenly thought of one thing, that is, when he was cultivating the field, he cleaned up a lot of weeds in the field, and even leaves and other sundries, originally Yang Heng piled them all in a big pit to prepare for manure, but if this manure is not good, the field is easy to grow insects, and it is easy to cause overgrown, Yang Heng remembered that in his previous life, he wanted to use the crop straw in the field to make machine-made charcoal, and he once looked up about machine-made charcoal on the Internet. Among them, there is a mechanism of charcoal grinding into powder for use in the field can add some nutrients to the field, and even improve the ability of the field to absorb heat, so that crops, or vegetables and vegetables yield and quality, so that these weeds and leaves can be carbonized, so that not only can be used as fertilizer, but also can kill the eggs and weed seeds?

Since we have come to this era, the development of science and technology is Yang Heng's primary goal, but the increase in grain production can not be given up, and even speaking, only the high yield of grain will promote the development of technology, and the transformation of the industry cannot be idle for a lifetime.