서리 is a natural phenomenon that occurs when moisture in the air freezes into ice crystals on surfaces. This typically happens during cold nights when temperatures drop below freezing. The formation of 서리 can create beautiful patterns on grass, leaves, and windows, making it a common sight in winter. In agriculture, 서리 can have significant effects on crops. While it can enhance the beauty of a landscape, it can also damage sensitive plants. Farmers often monitor weather conditions closely to protect their crops from the harmful effects of 서리, especially during the growing season.