Traveling through the sword to engage in military industry

"For a good harvest, the plowing must be deep and the fertilizer abundant, Lao Li. Next, we need to figure out how to get some fertilizer," Ren Zhong said with a smile.

"This, old Li knows. We'll collect pig manure, cow manure, and horse manure with all our might, and won't that give us fertilizer?" Li Yunlong said, as he indeed had experience with these things.

"No, if you put it anywhere, it will be unbearably smelly. Instead of fertilizing the crops, it'll suffocate people," Ren Zhong shook his head and said. This was a traditional rural method, but it not only involved harsh working conditions but also wasted a lot of fertilizer.

"Then, Brother Ren, if you have any good ideas, just tell us, and we'll do as you say," Li Yunlong said with a wry smile. His brain worked exceptionally well in battles, surpassing many Huangpu graduates, but when it came to scientific matters, Lao Li was stumped.

Ren Zhong didn't take advantage of Lao Li's lack of education and directly presented his plan.

One was to ferment dry manure to produce organic fertilizer, and the other was to treat wet manure with biogasification.

By using collected dry horse manure, cow manure, chicken manure, pig manure, and other common livestock and poultry manure, along with various straws, weeds, fallen leaves, and other scraps and household garbage waste, after biological fermentation catalyzed by fertilizer fermentation agents, excellent organic fertilizer could be obtained. One kilogram of this fertilizer fermentation additive could catalyze the production of one ton of organic fertilizer, and the effect of planting and topdressing could be said to be the best fertilizer Ren Zhong could currently obtain.

Ren Zhong couldn't yet produce a complete set of equipment for other chemical fertilizers.

Another channel was to build biogas digesters, using the principle of biogasification to treat wet waste such as human excrement. This would not only produce biogas that could be burned for cooking and boiling water but also turn biogas residue and biogas slurry into fertilizer for irrigating crops.

In Yangcun, the Independent Regiment now had more than a hundred horses and seven or eight hundred people stationed there. The amount of excrement produced by these people alone was considerable.

Ren Zhong had been planning for a long time to deal with these things, which would cause serious environmental pollution if left untreated. He brought a commonly used biogas digester from his main world to treat human excrement and built a real flush toilet.

Bamboo pipes were used to bring in mountain spring water for flushing, and after the biogas digester was built, the main pipes also used bamboo pipes, connecting the Yangcun biogas digester to the kitchen.

Now that Yangcun could manufacture its own pig iron, it was not difficult to directly create a model based on the current gas stove and cast a batch of gas stoves.

Xu Jiucheng and Gao Kaiming worked together for a few days on the slightly more technically challenging rotary valve, using casting and manual processing to successfully create a rotary valve with good airtightness, saving Ren Zhong's valuable cargo weight from importing it from the main world.

With many people and great strength, this small project was quickly completed under Li Yunlong's leadership. According to Ren Zhong's estimate, after the biogas produced from the excrement in Yangcun was utilized by the Independent Regiment, it would be more than enough for the entire regiment to boil water and cook, which would save the Independent Regiment's consumption of firewood and coal.

The excess biogas also had surplus to send to the baking warehouse for long-term heating and baking processes in the production of some explosive raw materials.

Seeing that the manure of people and animals in the village was used directly without treatment, resulting in poor fertility and sanitation, Ren Zhong intended to promote this practical biogasification technology to change the living environment of several nearby mountain villages. After completing the Yangcun Independent Regiment's excrement biogas project, he continued to have Li Yunlong lead the Independent Regiment to build simple public latrines in the most concentrated areas of people coming and going in these nearby mountain villages, and adapted to local conditions by diverting mountain spring water or setting up small waterwheels to draw water from mountain streams, so that everyone could flush away the filth after using the latrines.

Behind the public latrines, a standardized biogas digester was also built to complete the biogasification treatment of the collected manure.

The biogas produced was introduced into nearby homes for daily cooking and heating.

Of course, at the beginning of construction, no one knew how to use these things. Ren Zhong didn't explain, anyway, the people in this area were highly aware, and they did whatever Li Yunlong and the others said. Everyone was very curious about these newly built public latrines.

Because there was a water tank to store water for flushing, it was cleaner and tidier in the public latrines than at home. The public latrines built by Ren Zhong had a high utilization rate, providing sufficient raw materials for biogasification.

However, that was all there was to this biogas digester. The scale of the breeding industry in this era was very small. Many people couldn't even feed themselves. Only a few raised pigs, and even those who raised cattle and sheep did so in a free-range manner. Compared to Ren Zhong's main world, where raising hundreds of pigs was common, the breeding industry in this world was almost negligible. Therefore, even for someone like Li Yunlong, it was common not to eat a meal of pork for several years.

But this was also a limitation of production capacity. Ren Zhong didn't think about developing a pig-raising business at this stage to improve the lives of Li Yunlong and his men. Now was not the time for mass production.

On the one hand, the overall environment was quite treacherous, and the Japanese devils had the absolute upper hand. The Japanese devils could launch a mopping-up operation at any time, and even successful breeding might become the spoils of the Japanese devils' mopping-up operation. In a battle, it would be impossible to drive hundreds of pigs across the mountains and fields to escape.

On the other hand, there were not enough manpower and resources to obtain so much pig feed and cattle feed.

In the base area, the biogas digester was only a demonstration, and it was too far away for every household to use it.

For Ren Zhong, this small-scale application of biogas was just a small complement to solving the current rural environmental sanitation, and it did not have the value of large-scale promotion in this era.

In fact, even in the main world, it was not realistic to promote biogas in every household in rural areas. Ordinary families did not have so much organic waste to produce enough biogas to maintain a family's fuel.

Biogas fermentation takes at least 20 days to see results, so Ren Zhong was not in a hurry after it was built.

After screening, the planting plan Ren Zhong chose for the Yangcun area was intensive cultivation of high-yield hybrid corn. The seeds were naturally excellent hybrid corn varieties obtained from the main world. According to the mature cultivation methods in the same area of the main world, the yield per mu could reach at least 700 kilograms or more, and a few carefully cultivated fertile lands could yield one ton per mu.

The yield was high, the workload was relatively small, and the adaptability to the land was also very strong. It was also acceptable to eat it as a staple food ground into cornmeal, so naturally, it was chosen.

So, after returning to the main world, Ren Zhong directly wholesaled several tons of excellent corn seeds and asked them to be sent to the small courtyard in the suburbs. When Ren Zhong ordered the packaging, he specified that they should be packaged into 30-kilogram standard bags.

In this way, Ren Zhong could bring two sacks back to the Bright Sword world in one trip.

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A new cave was found near Zhaojiacun in the Bright Sword world to serve as a seed receiving warehouse. Now that Yangcun had horses, Ren Zhong could ride back and forth in an hour.

According to Ren Zhong's plan, he would accumulate ten bags every five days and then find someone to take them back.

On the one hand, this time period was just right to cover people's eyes and ears. On the other hand, this amount was enough to sow 75 mu of land, and Li Yunlong and his men couldn't reclaim it much faster now.

However, Ren Zhong had already asked Zhang Dabiao's troops, who had been developing in the Heyuan area, to start large-scale reclamation work, and to carry out organic fermentation and biogasification in various fortress villages according to the Yangcun model to accumulate organic fertilizer. After the seeds were in place, they would be the main force of mass production.

According to the information Ren Zhong found, the large-scale counterattack that was about to be launched this year would take place at the end of August. Now, cultivation could just be completed before the harvest of a batch of corn.

For the Independent Regiment, that would be enough surplus grain to fight hard with the Japanese devils in the coming year.

These, by that time, would be strategic materials that could not be bought with silver dollars.

If Ren Zhong's ability was not limited and he could not get more seeds from the main world to meet the needs of larger-scale planting, Ren Zhong would not be able to help but go to the brigade commander to carry out large-scale development at least in the Taiyue Military Region.

Unfortunately, hybrid corn could not be saved for seeds. With Ren Zhong's ability to bring goods in the next year, the planting area that could be supported was also limited, unless a group of breeding experts could be found. Ren Zhong could copy the ready-made knowledge of hybrid corn, hybrid wheat, and hybrid rice from the main world and let them breed on a large scale.

However, this could not be achieved in a short time. It would take at least three years and multiple seasons of iteration to obtain excellent varieties.

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