Zhang Feng did not leave. After going out from the front door, he made a circle and slipped into the mansion through the back door.

The reason why I got up so early today is mainly to go to Dongyuan to see potato seedlings.

That's the real baby. Once he gets it out, it's the money Zhang Feng can't spend all his life.

Although he knew later that the reward he had just given was a thousand liang of silver, Zhang Feng didn't regret it!

On the contrary, there is some excitement.

After all, solo music is not as good as public music.

Besides, even if the money of Zhang's house is given to the servant 1000 Liang every day, it can't be spent

Dongyuan is basically a forbidden area of the whole mansion.

Originally, this was a very ordinary house, but since the old man didn't know what he had moved back from the outside, the master directly ordered that no outsiders should enter this Dongyuan.

This is Zhang Feng's rule. No one dares to go beyond it. Even Jing Shu and Zhang Yuyao have only seen it a few times from a distance.

Compared with the other three courtyards, the area of Dongyuan is slightly larger, but at this time, the three old men are very disciplined. They never live in all the rooms. They just built a few thatched huts in the remote corner, especially next to the thatched hut. According to the scale of the brewery, a shed with a cooking pot was built, which is burning for many years.

The temperature here has reached a constant state. Even the trees, flowers and plants close to here are still lush, and the fallen leaves are still dilapidated five steps away.

At this time, the three old men burned a large pot of water early, and they didn't see any other action. They couldn't help adding water to the pot, while the other old man went to the kitchen and brought food. Several people gathered in front of the stove and ate and drank like this.

They didn't even notice Zhang Feng walking in.

Zhang Feng's eyes crossed the three and landed on a wooden trough in front of the stove

On the wooden trough, there are already more than ten dark green seedlings.

He looks rather fat.

Until this time, the three old men found Zhang Feng's arrival, got up quickly and said, "Sir, it's the little old people's dereliction of duty."

Zhang Feng waved and squatted in front of the stove with three old men. Looking at the raging fire in the stove, Zhang Feng suddenly felt that he had returned to the home of later generations.

When I was a child, the stove at home was like this!

Zhang Feng shook his head, took back his thoughts, pointed to the thatched shed next to him and asked, "why do you sleep here with so many rooms?"

"Go back to the master. This is our rule. Besides, we are dirty all over. How dare we defile the master's house? It's very good here. We can take care of the seedlings at night and look after the stove fire on the stove. Besides, it's warm here. The little old people are used to it."

Zhang Feng was speechless.

But he also thought that once, their family wanted to take grandpa to live in the city, but grandpa severely refused. The reason for refusing was the warmth in the mountains!

Zhang Feng did not insist, so he got up to check the situation of potato seedlings.

Potato seedlings are really good from a distance.

But when you get closer, you can find the difference.

That is, there are not only some yellowing, but also some black spots on the newly extracted buds!

This should be a disease, but Zhang Feng knows nothing about it. After all, he really doesn't understand agronomy. He just judges it based on his experience of growing up in the countryside for more than ten years.

It should be lack of phosphorus.

And he also studied the soil of Datang.

Han, there are too many alkaline substances.

Zhang Feng doesn't have to think about it.

"Master, what do you think of this seedling called potato? It's the little old people. When their own son is looking after it!"

Several old men said with some ostentation.

Zhang Feng nodded with a smile: "this seedling is really good, but he lacks fertilizer!"

Several people could not help but change their faces.

"Can't we? We water it with gold juice every day according to your orders. Where can there be such a thing?"

The first thing they do every day is to check the seedlings, even if there is an insect egg in the soil, they will destroy it at the first time.

Not to mention fertilization.

They are all Zhuang family. At this time, they are in Zhang Feng's house. The gold juice they were reluctant to use is inexhaustible here. They all want to pour all the gold juice on the potato seedlings.

Knowing that they had misinterpreted their meaning, Zhang Feng shook his head and said, "you think too much, I don't mean that, I mean..."

"Forget it, you don't understand. When you go to Chang'an University tomorrow, I'll give you some fertilizer. Every five days, you use your eating spoon, wipe a spoon, throw it three inches away from the potato seedlings, and then cover it with soil, but after this thing is used, I must hear their reaction every night!"

Although there is no problem with phosphate fertilizer, Zhang Feng also wants to test whether phosphate fertilizer works. The most important thing is to see whether the fertilizer is really purified successfully.

The old man was a little surprised, but he copied it.

Who made Zhang Feng the owner?

And the things Zhang Feng once concocted are unprecedented!