He carefully placed the special Soil Blocks along the predetermined path, ensuring that each critical intersection contained at least two connected nodes. Once activated, these nodes would supply water that would flow slowly along a specific route, filling all the ditches. Considering that the maximum distance for water to spread naturally was limited to a certain range, he cleverly designed the layout to keep the maximum spacing between each water supply node within that limit, allowing all sections to interconnect and ensuring that the water source could reach every area.
After the last section of the waterway was adequately irrigated, Yun Yi once again used the Water Ladder to ascend to the surface. He first returned the empty Iron Barrel to the warehouse and then retrieved some necessary materials, including iron bars and Wood Sticks for crafting farming tools. Using the Crafting Table, he created ten iron farming implements and organized these tools along with the seeds for planting—carrots, Wheat, and Sugarcane—along with Granite Blocks and a Cutting Machine for reinforcing structures.
Although the Crafting Table could convert Rock Blocks into Rock Staircases, it required six Rock Blocks to produce four staircases. In contrast, the Stone Cutter only needed a single Rock Block to complete the cutting task while producing the same number of staircases, saving two Rock Blocks in the process. However, Rock Blocks were not rare for Yun Yi; he still had thousands stored away without knowing where to place them. Nevertheless, frugality is a traditional virtue in Chinese culture, and adhering to this spirit, Yun Yi carried these materials and took the Water Elevator back down to the underground area.
At this point, the ceiling of the underground space was adorned with numerous Nuclear Torches, illuminating this subterranean world with bright light. Holding two iron shovels, Yun Yi swung them skillfully—left and right—transforming the land into fertile farmland wherever he went. Before long, he completed clearing an area of 1,200 square meters for carrots and a similarly sized field for Wheat.
As for Sugarcane, it did not require special tilling; it could grow near water on either soil or sand. Therefore, there was no need to cultivate a specific area for Sugarcane. Next, Yun Yi took various seeds from his backpack and began planting them in succession. Planting Wheat was incredibly simple; just one step of scattering a handful would suffice. Once Wheat seeds touched the soil, they instantly burrowed into it. After a short wait, vibrant green shoots would emerge from the ground, marking successful planting.
In contrast, planting carrots required more precision; they needed to be rooted in the soil before quickly sinking into it. Within seconds, clusters of lush green life would burst forth from the earth.
The most complex task was the planting of Sugarcane, which required inserting a longer segment into the soil. It is worth noting that only the initial planting is necessary; thereafter, by leaving a small portion in the ground after each harvest, continuous growth can be achieved, much like an unwearied perpetual motion machine. Once all three thousand square meters of planting area were covered, Yun Yi felt quite pleased.
Calculating based on the yield of eight kilograms of carrots per square meter every three days, this entire area of one thousand two hundred square meters could produce nine thousand six hundred kilograms within three days. In comparison, the unit efficiency of Wheat was lower, yet it could still yield four kilograms from one square meter in four days. Therefore, in a one-square-meter Wheat planting area, four thousand eight hundred kilograms could be produced over a four-day cycle.
Assuming that one person requires two kilograms of food per day, this micro underground farm could sustain twenty thousand people. Compared to the highly improved and carefully cultivated Wheat of modern times, the yield per mu (approximately 1/15th of a hectare) during the Eastern Han Dynasty was far inferior. Modern Wheat yields often exceed one thousand kilograms per mu, while the best farming practices of that period could only achieve several hundred kilograms per mu, with secondary farmland yielding barely over one hundred kilograms.
Because of this, an ordinary farmer needed five mu of land to ensure basic sustenance, while cultivating ten to dozens of mu was necessary for a more affluent lifestyle. For instance, although the Zhao Family's village boasted thousands of mu of land, by the standards of the late Eastern Han, this would at most classify them as a relatively wealthy family—not enough to rank among local powerful families. After deducting various heavy taxes and levies, the Zhao Family might have some surplus under normal circumstances; however, in the event of natural disasters, they would revert to a life of frugality.
As for true noble families that had been passed down through generations and held significant positions for three generations or more, the Yuan Family—known as the Four Generations of Three Dukes—was a prime example of such an illustrious lineage. The Guang Family in Runan Commandery owned hundreds of thousands of acres of fertile land and had over a million acres nationwide under cultivation, making them exceedingly wealthy and even capable of exerting influence on the state.
This immense wealth was precisely what allowed the Yuan Family to almost control half of the Han Dynasty by their own strength. Unfortunately, internal strife plagued the Yuan Family; otherwise, with their vast wealth and widespread reputation for holding key positions in court for four consecutive generations, they might have truly ended the Han Dynasty and established a new dynasty.
After reflecting on these matters, Yun Yi took out his Shovel. To solve how people could more easily access the basement, he needed to dig a staircase. He then held his Shovel and began excavating upward at an angle along the edge of the basement. Since the entire basement was only ten meters deep, it didn’t take long before he broke through to the surface.
Of course, while this newly created staircase was passable for people, it was quite inconvenient to use; each step's height was equivalent to that of a Block—about one Michael—making it feel like climbing rather than walking down stairs. Given this situation, he immediately set down a Stone Cutting Machine and used it to cut the original granite blocks into more suitable steps for walking.
Even so, the granite steps still had considerable height differences because one meter's height only included two segments; compared to the original one-meter drop, it now measured half a meter—an improvement nonetheless.
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