Why continual harvesting of soy beans have impacts increased nitrogen in ecosystem?

Continual harvesting of soybeans can lead to increased nitrogen levels in ecosystems due to the practice of monoculture and excessive fertilizer application. Soybeans are nitrogen-fixing plants, but when harvested repeatedly without crop rotation, the soil's natural nitrogen balance can become disrupted. Additionally, the use of synthetic fertilizers to boost yields can result in nitrogen runoff into nearby waterways, contributing to nutrient pollution and harmful algal blooms. This disruption can ultimately harm local ecosystems and biodiversity.