Chapter 275 (subscription is not required) explains what a controlled experiment is

Author: Qi Ye

Chapter 275 (subscription is not required) explains what a controlled experiment is

Time goes back to three months ago.

After the Lantern Festival, His Majesty announced Fu Yuanzhi and Song Yizhi to the palace. When Fu Yuanzhi came back, he and Song Yi discussed the issue of increasing production.

Song Huan listened and thought about it all night. It happened to be Xiu Mu the next day. After eating the morning meal, Song Huan sat directly opposite Fu Yuanzhi and said softly: "Are you worried?"

Fu Yuanzhi stopped writing and raised his head to look at Song Huan. After looking at each other for three seconds, Fu Yuanzhi put down his pen and placed his hands flat on the table. He unconsciously tilted his head towards Song Huan and said with a raised lip: "Seeing Madam's appearance,

Can you help my husband solve his doubts?"

Seeing the sudden ambiguous atmosphere, Song Huan couldn't bear it. He strategically leaned back, raised his fist and poked Fu Yuanzhi's cheek with a white finger, and said, "Just talk, what are you doing? Sit down.

, sit upright."

Fu Yuanzhi suppressed his smile, pretended not to know, looked at himself and then at Song Huan, and asked blankly: "What's wrong? Is this bad?"

Song Huan: "..."

Song Huan cleared her throat and pursed her lips. Seeing Fu Yuanzhi's proud look, she stepped forward directly. Their noses were less than a finger apart.

Song Huan's very provocative gaze slowly looked down from Fu Yuanzhi's forehead until it stopped on his lips. Song Huan swallowed and directly took a sip from the bar.

Fu Yuanzhi's eyelids drooped slightly, and although his face remained calm, his slightly clasped hands revealed his nervousness at this time.

But Song Huan didn't intend to let Fu Yuanzhi continue to calm down. After the kiss, he directly attached his hand to Fu Yuanzhi. He first touched Fu Yuanzhi's palm, and then quickly placed his index and middle fingers on his pulse.

Song Huan made a sound in surprise.

Fu Yuanzhi also came to his senses at this moment and took his hand back.

Song Huan was proud and said, "Besides, you still want to win against me!"

Fu Yuanzhi: "..."

Seeing that Fu Yuanzhi was silent, Song Huan moved other things on the table, took Fu Yuanzhi's paper, and spread it out with both hands.

Song Huan said sternly: "To tell you the truth, although you will slowly explore it yourself, it will probably waste a lot of time. Too many people can't afford to wait. If I can help a little, you can do less.

Take some time."

When Fu Yuanzhi heard this, the messy things in his mind disappeared instantly, and he said seriously: "Okay, madam, please listen to me."

Song Huan took out his special charcoal pen from the other side and looked past the brush.

Tsk, the brush will only affect the speed of her attacks.

Song Huan listed the words one by one.

Fu Yuanzhi already knew all about himself, and Song Huan was too lazy to pretend anymore. She said while writing: "First, let's conduct a controlled experiment and divide it into an experimental group and a control group."

After writing down the four words "controlled experiment", Fu Yuanzhi wondered: "What is a controlled experiment?"

Song Huan paused for a moment and tried to explain the meaning of the controlled experiment in his mind: "Actually, the harvest of crops will be affected by many factors, such as light, soil moisture, fertility, thinning, etc., but so many factors

What factors can increase the yield of barley? The controlled experiment is used to prove the exact impact of one of these factors on the experimental results."

Fu Yuanzhi digested it for a moment. Although he still didn't understand it, he wrote down these words for later understanding. He said: "Continue."

Song Huan thought that he would be able to understand the controlled experiment later when it was explained, so Song Huan stopped worrying and continued: "I listened to your conversation with Uncle Gao before, and thinning is a way to increase production.

Method, but what is the best time period? Is it possible to compare it? "

Song Huan drew circles on the paper, pointed at one of them, and said while writing: "Assume that for this piece of land, you can use the method taught by Uncle Gao, and for the other pieces of land, you can divide the seedlings into different thinnings.

method."

"We divide them into several code names. Number 1 is Uncle Gao's thinning method. Number 2345 and so on we can use the possibilities we guessed."

"Suppose there are four hundred plants in No. 1, and the row spacing * hole spacing is 2*1 (feet), then No. 2 is divided into 2*1.5 (feet), No. 3 is 2*2 (feet), and so on.

Keeping other factors unchanged, and only changing the row spacing and hole spacing, you can figure out which distance is the most suitable for the growth of banana wheat."

"Of course, this may only be limited to the capital city. It may be different in different places such as Danyang County, Yangjiang Prefecture, etc."

Fu Yuanzhi looked at the picture drawn by Song Huan and combined it with what Song Huan said, and he finally understood it.

"So, when you say contrast, you mean contrast."

Song Huan nodded and said with a smile: "Yes, that's what it means, but you have to note that this condition can only change the row spacing and hole spacing, and other factors cannot be changed. Fertility, terrain, soil, lighting, etc., as long as there is one

If it changes, your experiment will not be considered a success."

Fu Yuanzhi nodded, "Understood."

Fu Yuanzhi pulled away the "messy" paper that Song Huan had drawn on, carefully put it away, then took out a piece of clean paper, flattened it, and said, "Continue."

Song Huan raised his eyebrows, his eyes filled with sighs.

He is worthy of being a top student...

After Song Huan was brought back to his senses by Fu Yuanzhi, he continued: "After we have found the best way to acupoint distance and line distance, we can try to change other factors."

"For example, only one seedling per hole is left. Because it is evenly distributed, it can make full use of various factors in the early growth period (before tasseling). Therefore, it usually grows into a thicker stem, but when the banana plant grows vigorously,

, will it really increase production?”

After Song Huan asked this question, he finally typed up to say hello.

Fu Yuanzhi also came up with the answer at this time and said: "The leaves of the wheat are enlarged and widened, which strengthens the shade and the sunlight is not fully exposed. It really needs to be carefully observed whether the grain yield of this wheat is high or low."

Song Huan nodded, with a teachable expression on his face.

Song Huan continued: "In this case, we boldly speculate whether hole sowing has any impact on growing banana wheat?"

"Is it feasible to expand the row spacing and reduce the plant spacing?"

“What about single plant strips in wide and narrow rows?”

"Can wide and narrow rows of single-plant strips be divided into other forms?"

"For example, the spacing between wide rows is about three feet, and the spacing between narrow rows is about one foot?"

"Or, extremely wide and narrow rows, with large row spacing enlarged to more than four feet..."

"Of course, these are all my examples. You won't know if it works until you actually try it, right?"

Fu Yuanzhi said: "What do you mean by hole digging? Is it the shape of the hole dug?"

Song Huan choked.

Then he lowered his head and without any nonsense, directly drew a hexagon and a square, and then marked the points of each corner. The positions of those points were the sowing pits.

Song Huan could not say that she had read the newspaper or knew about the relevant investigation report.

Plants use nutrients most effectively, including space factors and soil factors, in a circular shape. The utilization rate when sowing in square holes is only 78.54%, while the utilization rate in hexagonal holes reaches 90.69%, which increases the utilization rate by 15.5%.

.

Song Huan just told Fu Yuanzhi directly, which one can increase yields and improve land utilization by planting in a hexagonal shape or planting in a square shape.

Thank you to the comrades who voted~
Chapter completed!