Song Yuanhuanzhi

Chapter 275 (subscription is optional) explaining what is a controlled experiment
Time goes back to three months ago.

After the Lantern Festival, His Majesty announced Fu Yuanzhi and Song Yi into the palace, and when Fu Yuanzhi came back, he discussed the issue of increasing production with Song Yi.

Song Huan listened from the sidelines and thought about it all night.It happened that the next day was Xiu Mu. After eating the court food, Song Huan sat directly opposite Fu Yuanzhi and said softly, "Are you worried?"

Fu Yuanzhi stopped writing, looked up at Song Huan, his eyes met for three breaths, Fu Yuanzhi put down the pen, put his hands flat on the table, tilted his head towards Song Huan unconsciously, and said with pursed lips: "Seeing Madam's appearance, Can you help solve my husband's doubts?"

Seeing the sudden ambiguous atmosphere, Song Huan couldn't bear it, so he leaned back strategically, raised his fist and slapped Fu Yuanzhi's cheek with a white finger, and said, "Just talk when you talk, what are you doing? , sit upright."

Fu Yuanzhi suppressed his smile, looked at himself and then at Song Huan pretending not to know, and asked blankly, "What's the matter, is this not good?"

Song Huan: "..."

Song Huan cleared her throat and pursed her lips. Seeing Fu Yuan's smug face, she leaned forward directly. Their noses were within a finger's distance.

Song Huan's aggressive gaze slowly looked down from Fu Yuanzhi's forehead until it paused on his lips. Song Huan swallowed, and leaned forward to take a sip.

Fu Yuanzhi's eyelids drooped slightly. Although his face was silent, his slightly clasped hands revealed his nervousness at the moment.

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

Song Huan made a sound in surprise.

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

Song Huan was proud, and said: "And, you still want to win me!"

Fu Yuanzhi: "..."

Seeing that Fu Yuanzhi had stopped talking, Song Huan removed the other things on the table, took Fu Yuanzhi's paper, and spread it out with both hands.

Song Huan said sternly: "I'm serious, although you will slowly find out by yourself, it will probably waste a lot of time. Too many people can't afford to wait, I can help a little, and you can do less Take your time."

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

Song Huan took out his special charcoal pen from the other side, his eyes skipped the brush,

Chick, the brush will only affect the speed of her shots.

Song Huan listed several words one by one.

Fu Yuanzhi already knew the details about herself, and Song Huan didn't bother 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 words "Controlled Experiment", Fu Yuanzhi asked in confusion, "What is, Controlled Experiment?"

Song Huan paused for a moment, trying to explain the meaning of the controlled experiment from his mind: "In fact, the harvest of crops will be affected by many factors, such as light, soil moisture, fertility, thinning, etc., but so many Which factors can increase the yield of wheat. Controlled experiments are used to prove the exact impact of one of these factors on the experimental results."

Fu Yuanzhi digested for a while, although he still didn't understand, but he wrote down these words for later understanding, he said: "Continue."

Song Huan thought about the controlled experiment and he should be able to understand a thing or two when he explained it later, so Song Huan no longer struggled, and continued: "I heard the conversation between you and Uncle Gao before, and thinning is a way to increase production. method, but what time period is the best? Is it possible to make a comparison?"

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

"We divide them into several code names. Number one is Uncle Gao's method of thinning seedlings. We can use the possibilities we guessed by number two, three, four, and five."

"Assume that there are 2 plants in the No. 1 plot, and the distance between rows and holes is 2*1.5 (feet), then No. 2 is divided into 2*[-] (feet), No. [-] is [-]*[-] (feet), and so on. Keeping other factors constant, and only changing the row spacing and hole spacing, you can figure out which one is the most suitable distance for the growth of wild wheat.”

"Of course, this may be limited to the capital city. It may be different in Danyang County, Yangjiang Prefecture, etc., with different row and acupoint distances."

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

"So, the comparison you mentioned means comparison."

Song Huan nodded and said with a smile, "That's right, that's what it means, but you have to pay attention, this condition can only change the row spacing and hole spacing, and other factors cannot be changed. As long as there is one factor such as fertility, terrain, soil, and light If it changes, your experiment will not be considered a success.”

Fu Yuanzhi nodded, "Understood."

Fu Yuanzhi pulled away Song Huan's "messy" paper and put it away carefully, then took out a clean piece of paper and said, "Continue."

Song Huan raised his eyebrows, his eyes were full of sighs.

As expected of a top student...

After Song Huan was brought back to his senses by Fu Yuanzhi, he continued: "After finding out the best method of acupoint distance and row distance, we can try to change other factors."

"For example, the reserved seedlings only have one plant per hole, because they are evenly distributed and can make full use of various factors in the early stage of growth (before tasseling), so they usually grow into thicker stems, but when the wheat grows vigorously , will you really raise your childbirth?"

After Song Huan asked this question, he finally typed up the question smoothly.

Fu Yuanzhi also came up with an answer at this moment, saying: "The leaves of the barley grow wider and wider, which strengthens the shading, and the sunlight is not fully irradiated. Whether the grain yield of the barley is more or less needs to be carefully observed."

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

Song Huan continued: "Since this is the case, let's boldly guess whether hole seeding will affect the cultivation of wild wheat?"

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

"What about single planting in wide and narrow rows?"

"Is it possible to divide the single-plant strip planting in wide and narrow rows into other forms?"

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

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

"Of course, these are all my examples. Only by trying it will you know if it works, right?"

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

Song Huan choked.

Immediately lower your head, without talking nonsense, draw a hexagon and a square directly, and then mark the points on each corner. The positions of those points are the pits for planting.

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

The most effective use of nutrients for plants, including space factors and soil factors, is circular, and the utilization rate of square hole planting is only 78.54%, while the utilization rate of hexagonal holes reaches 90.69%, which increases the utilization rate by 15.5%. .

Song Huan just told Fu Yuanzhi directly, planting according to the hexagon or planting according to the square, which can increase the yield and improve the land utilization rate at the same time.

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(End of this chapter)