The density of the seeds, intercropping, and as for grafting fruit trees, this technique was actually passed down a long time ago, but few people actually did it.
After all, no commoners would specially plant a fruit tree.
Of course, aside from that, the most important thing is fertilizer.
Modern grain cultivation surely involves fertilization, so the land can be reused after growing grain, without worrying about the land losing fertility and affecting next year's harvest.
Ye Muyu discovered this a long time ago.
During this period, she had no way to extract various elements to make fertilizers under these conditions, so she had to make do with farm manure.
She was willing to fertilize, and also had people dedicated to cultivating fertilizer every year, raising pigs and poultry on each Manor, as the selected locations were relatively far away, they would not affect the Manor's environment and could also acquire waste for mutual benefits.
