What kind of estate, what crops.

Long before the formation of feudal society, farming was the main way for human beings to obtain food, along with fishing, hunting and animal husbandry, which supported the steady development of human society until now. A complete set of soil assessment methods has gradually taken shape with the condensation and summary of folk wisdom in previous dynasties, and this law is naturally applicable to the assessment and calculation of any soil quality.

Lunar soil is no exception.

The test results of the Quality Supervision Bureau are naturally not only for the cultivability of the soil, but also based on various factors such as element composition, water content, agglomeration rate and so on. Give a detailed summary report, such as whether it contains heavy metals, whether it is conducive to farming, and whether the cultivated crops are edible; Or according to the analysis, the proportion of minerals and compounds is given, and whether they can have mining value is discussed.

Of course, everything is based on the earth's environment, after all, there are only a few laboratories in the world that have come into contact with lunar soil, and no one is fanatical enough to include lunar cultivation in the details of the quality inspection report.

Holding a quality inspection report more than ten pages thick, Nie Peng studied it carefully while pondering how to turn the rich dust layer on the moon into arable soil through artificial means. At least the heavy metal content of the lunar soil in this report is far below the lethal level, which is also a good start, after all, I have eaten a lot of cadmium-containing rice, isn't it okay.

(Cadmium, derived from Kadm ia, meaning "earth", was discovered in 1817 by three scientists, including German chemist Friedrich Stromeyer.) After World War I, cadmium was widely used in the production of electroplating, alloys, solders, batteries, radars, phosphor screens, semiconductor components, pesticides, plastics, firearms and ammunition. In 1968, the Japanese government determined that the unbearable pain of the residents of the Kamitsugawa River in Toyama Prefecture was caused by the consumption of cadmium-containing rice by local residents. Cadmium is absorbed into rice through rice, and the human body has long ingested cadmium through rice to cause proximal renal tubular damage, calcium, phosphorus and low molecular weight protein can not be reabsorbed and directly excreted from the urine, calcium cadmium ion radius is similar, calcium in bones is constantly dissolved, cadmium replaces calcium into bones, especially in the absence of vitamin D. ）

Looking at the analysis table of soil elemental composition in the report, a large number of compounds are listed: silica, iron oxide, magnesium oxide, calcium oxide、。。。 Even phosphorus and potassium exist in certain forms, but nitrogen is the only element, and I have found no trace of it after searching the table. Nie Peng couldn't help but look at the foreman of the construction team differently, just based on a potato seedling that had just been leafed, he could judge the nitrogen deficiency of the lunar soil, and it seemed that the folk wisdom passed down over the years should not be underestimated.

Now that we have found the crux of the problem, it is easy to wait for the framework of the factory to be built, and to set out a cultivation room, and use the lunar soil brought back as the base soil, and see what method can be relied on to improve it into suitable land for cultivation. Then you can try planting in the lunar base, as for whether the grown things can be eaten, and whether there will be any adverse effects after eating. Nie Peng said that there is a creature called a guinea pig.

This project is not big or small, but it boils down to a project that takes time to pile up results. Fortunately, he can take enough lunar soil for research in an infinite amount, otherwise with the current level of aerospace in the world, I really don't know how long it will take to summarize a reliable improvement method.

Write down the idea of soil improvement in the blank space of the report, and then continue to look back---- this is a habit left by Nie Peng's perennial reading, and write down his experience and experience in the gap of the paragraph, so as to deepen the impression when he reads it afterwards.

The sample submitted for testing contains a mineral element analysis form.

The things that are talked about here are far away from Nie Peng, after all, it involves some knowledge of mining and screening, and he has less contact, but some of the words can still provide him with some ideas, such as glass refining, titanium alloy extraction, etc.

After reading the whole report, he was already a little dizzy, and he had to stop and think about the next step, after all, the two paths of agriculture and industrialization are in front of him, and no matter which aspect he chooses, it will inevitably create a situation where one leg is long and the other is short: a lunar base without a food base, or a lunar base without building materials.

No matter which side these two results tend towards, they cannot be connected with the forces on the earth, after all, no astronauts are consumables, they are all living people, and they will not go back after they have never heard of the moon landing.

When the thinking problem reached a bottleneck, Nie Peng felt that his mentality was messed up again, and those ultimate questions such as what he was for and what his purpose was once again emerged from his mind, disturbing his thoughts like a demon. After thinking about it again, it changed from a scientific problem to a philosophical problem, which he didn't want to see, so he had to give up, took a change of clothes, and prepared to take a bath.

Not long after he entered, Jiaying's mobile phone rang, it was her mother's video call. Looking at the bathroom with the lights on, she who usually asked Nie Peng to do a good job of concealment relaxed, thinking that Nie Peng should not suddenly run in and make trouble at this juncture, so she pretended to be casual and clicked on the video button.

The topic between mother and daughter is whether they are doing well, whether the local weather is good or not, and so on, because they haven't thought about how to tell their mother about Nie Peng, so the resignation incident caused by him has not reached the ears of the second elder. So in the impression of the second elder, she is still on vacation.

Jiaying, who hasn't seen her mother for some days, is a little selfless when she chats, especially when her mother focuses the camera on Di's father, Jiaying's voice once rose up, and she was affectionately coquettish and cute to her father, and the middle-aged man opposite was very tired.

Nie Peng, who was soaking in the bathtub and was drowsy, heard Jiaying talking outside in a trance, thinking that he was talking to himself, and listened attentively, but he couldn't hear clearly at all, but Jiaying was still babbling there, disturbing him not at peace, so he simply came out of the bathtub, scrubbed it clean and walked out in pajamas.

The first thing I said when I opened the door was, "What did you just tell me?" Jiaying, who didn't notice that she was holding the phone and was on video, trembled, as if she had been immobilized.

Then there was extreme silence, the person holding the phone, the person walking out of the bathroom, and the two people on the other end of the line.