Seeing that the mountain chief finally relented, the students of Wuben Academy were all relieved, and they secretly rejoiced one by one, only to feel that the hard days had finally come to an end.

The truth is brutal, but the facts are there...... Like Shi Jizhi, there are still a few people who can experience many benefits such as strengthening the physique, tempering the will, making the article more real and insightful, and condensing the down-to-earth atmosphere from farm work.

Most people who read the book only think that farming is torture.

It's understandable, how many people are willing to work in the fields all day with their butts pouted? Aren't they all aimed at Ma Yilong's high level of learning, and he has worked hard in education for half his life, and he is an out-and-out authority in the imperial examination?

Their calculation is that even if they only spend half the time studying at Wuben Academy, it is better than letting those two knives guide their studies, and it is much better than doing it behind closed doors.

Now Zhao Gongzi promised them that after going to Kunshan, he would let the famous teachers of Yufeng Academy take charge of their studies to reduce the burden on the mountain chief. But these guys are so happy.

Because the mountain chief has to face 600,000 acres of land and 60,000 farmers every day, and he also has to engage in agricultural scientific research, there is definitely no time to continue to toss them.

And Zhao Gongzi will also take the time to guide them. In Daming, the ability to teach people to study can be better than their mountain chiefs, I'm afraid that only Zhao Gongzi is the only one, right?

Although a certain beast in Suzhou Mansion may express dissatisfaction...... But a five-jinshi is the golden signboard last word.

Ma Yilong couldn't help but be secretly annoyed when he saw the students' expressions, which could be regarded as dawn. He sneered: "Don't worry, when you arrive in Kunshan, the old man will not ignore you, at least he will supervise you and continue to plant the land." ”

"Yes, the mountain is long......" The students became frosted eggplants.

~~

After lunch, Ma Yilong sent his disciples to work in the fields. Even if you want the land of the academy to be taken care of by someone else, you have to complete all the preparations before planting.

He and Zhao Hao talked about agricultural technology under the pergola. Ma Yilong has personally cultivated for many years, and has read all the agricultural books of the past dynasties, which can be described as rich experience and solid theory. Traditional agriculture is a profession that relies heavily on experience and practice. He thought that no one knew how to farm better than he did.

Ma Yilong has even insisted on using the 'ear selection method' to increase yields for many years.

To put it simply, it is to select the strongest man after the rice is ripe...... Oh no, Spike. Threshing separately and set aside for seeding.

It's a laborious process, but it's been amazing year after year. The yield per mu of his academy has doubled the average.

It's a pity that the common people can't always come to this kind of fine play, which leads to the delay in keeping up with the yield per mu in Liyang......

Although Zhao Hao has never farmed, he has a lot of new agricultural knowledge that the other party has never heard of, and the impact on Ma Yilong can be imagined.

He told Ma Yilong why 'crops are all dependent on dung', because fermented manure is rich in nitrogen, phosphorus, potassium and various organic matter. Nitrogen, phosphorus and potassium are the nutrients that plants need and take away more at harvest.

But they don't return much to the soil in the form of stubble and roots, so these three nutrients must be constantly replenished for plants to thrive.

"Egg Spray Nails?" Ma Yilong is naturally unheard of.

"You didn't study Chemistry, and you didn't understand it." Zhao Hao felt that it was necessary to deal a blow to Comrade Ma's over-inflated self-confidence. Taking a sip of tea, he said slowly:

"You just need to know that nitrogen, phosphorus and potassium correspond to leaves, rhizomes. I'll teach you a smooth talk, and when you see the condition of the crops in the future, you can judge for yourself what is lacking and make up for what is missing. ”

"Well, please." Ma Yilong nodded, he was indeed hit.

"What is missing, what is missing, look carefully, nitrogen, yellow, red, phosphorus, potassium, brown spots. Potassium carries lodging phosphorus to resist drought, and the branches and leaves are yellow and thin but due to nitrogen. Nitrogen grows leaves, phosphorus grows fruits, and there is potassium fat waist and thick stems. Zhao Hao smiled and taught the characters who appeared in the junior high school biology book about junior high school biology, which was a great feeling.

It's like, it's like using Sister Ma's poem to move Sister Ma, which makes people almost climax in the skull.

Thinking of this, he couldn't help but glance at Ma Xianglan, who was sitting next to him, and Secretary Ma smiled in return. Although I always feel that Childe's smile is a little ill-intentioned......

~~

Zhao Hao told Ma Yilong again, but he should also pay attention to it. If nitrogen is applied excessively, the plant will be greedy for green and late maturing, prone to lodging, and susceptible to disease invasion. Root crops can also disappoint root yields because the leaves grow too luxuriantly.

Excessive phosphate fertilizer will cause crops to mature late and reduce seed setting rate. Excessive potassium fertilizer can lead to reduced yields.

Ma Yilong was dumbfounded when he heard this, he thought that Zhao Hao, a boy like Zhao Hao, who didn't touch the spring water with his fingers, even if he had agricultural knowledge that he didn't know, it was only a little bit. I didn't expect it to be so systematic and practical!

"Is this the power of science?" He muttered a sigh and asked Shi Jizhi to quickly take pen and ink to write it down.

Zhao Hao immediately asked Ma Yilong to give him a box of pencils, it is too strange for agricultural technicians to use brushes, or pencil heads cigarette box paper, which is more in line with the professional image.

Ma Yilong naturally knows leads, but Zhao Hao's box of pencils is much more practical. I saw that in the carved wooden strips, a black lead core was embedded, and then the two wooden strips were glued together in pairs. The box also comes with a knife, apparently used to sharpen the pen.

"China card?" Ma Yilong saw that there was still a trademark on the box, and couldn't help but praise: "Childe is really patriotic." ”

"That's it." Zhao Hao smiled awkwardly, and said in his heart that it was actually the bad taste of this son.

Ma Yilong used a pencil to write down the knowledge that Zhao Hao had just imparted. Then he looked up and asked, "So where are these three treasures?" ”

"At present, potash is mainly derived from plant ash; Nitrogen fertilizer mainly comes from well-rotted human and animal urine...... Actually, soybeans, forget it, when I didn't say; Phosphorus fertilizer, fish scales, fish bones, animal bones, eggshells, clam shells, chickens, ducks, geese, bird droppings, etc. are abundant. ”

"I see!" Ma Yilong slapped his thigh violently, and excitedly said his exclusive secret recipe: "The old man collects shells from the river and grinds them into powder and scatters them in the ground, and the harvest will be a little higher." Sure enough, nitrogen grows leaves and phosphorus grows fruits! ”

"And before the flood, I will sprinkle grass ash in the ground to prevent lodging, it turns out that it is because of the presence of potash fertilizer!"

After all kinds of confirmation, Ma Yilong was convinced of Zhao Hao's theory, and pulled him to not let go, with a posture of squeezing him dry.

"Just now you said that there are all nitrogen, phosphorus and potassium in the feces?"

"Of course, dung is golden juice."

"Not bad!" When Ma Yilong heard this, he couldn't help but feel like a confidant. "The old man often said that the gold and silver mountains are not as good as the dung mountains, but unfortunately they always think that I am sick."

"That's because they don't know." Zhao Hao laughed and said: "In order to encourage people to actively compost, I spend money to collect manure. One cent for a load of human manure and water, ten points for one hundred catties of cow dung, fifteen points for one hundred catties of pig and horse manure, twenty points for one hundred catties of poultry manure, and twenty points for one hundred catties of sheep manure!

Hearing his categorical offer, Ma Yilong asked with interest: "Poultry manure is rich in phosphate fertilizer, and the amount is small, I understand." Why is sheep manure so expensive? ”

"Among all kinds of animal manure, sheep manure has high nitrogen, phosphorus and potassium content, followed by pig and horse manure, and cow manure is the lowest; Cow dung is the most excreted, followed by pigs and horses, and sheep dung is the least, so it is priced. Zhao Hao replied with a smile: "It's very reasonable, right?" ”

"Reasonable, very reasonable!" Ma Yilong applauded and praised: "Now all the dung in Kunshan will belong to us!" ”

"The people of Kunshan still have too few livestock, and the idea of attacking Suzhou City is enough." Zhao Hao was dissatisfied with his desires.

"That's a million people in Suzhou, how many people have to pull......" Ma Yilong was leisurely fascinated.

The two chatted enthusiastically, but the people next to them were about to vomit out their lunch.

ps. The first update of the three consecutive changes, ask for a monthly pass!