먹다 남은 싹이난 고구마를 풀밭에 통째로 심으면 생기는 일

I'm digging sweet potatoes planted in a grassy field where I can't plant anything. I planted it here without throwing away the sweet potatoes that I ate at home. If you look at this video, even if you don't have a field to plant sweet potatoes or if you have a field, If there is a space where only grass grows because it is a grassy field, It will help you to grow sweet potatoes easily and harvest them. This is what it looks like on April 28th, the 41st day of planting. It's already autumn. It's been 156 days since I planted it, and I'll harvest it on October 1st. I planted two whole sweet potatoes in a grassy field and harvested 10 kilograms. The planting time is after April 20th, when the soil does not freeze. For your information, my field location is Cheonan, so please refer to the date of planting for each region.