How do agricultural wastes harm the environment?

Agricultural wastes harm the environment in the following way:

1. Agriculture, including commercial livestock and poultry farming is a source of many organic and inorganic pollutants in surface waters. Pesticides from agricultural run off, metals and processed chemicals are also major sources of water pollutants.
2. Excess nitrates and phosphates lead to Eutrophication in water bodies which leads to loss of aquatic life and disturbs the aquatic ecosystem.
3. Chemical fertilizers and pesticides contain potassium and phosphorus, which are released in water bodies through run-off water. This also affects the plant growth in the soil.
4. Radio-tracers extensively used in agriculture are also responsible for radiation pollution.