In 2015 NRCS began broad support of soil health, which incorporates less tillage and more cover crops to reduce erosion and improve the diversity of the soil. Information is maintained in the Soil Survey Geographic database (SSURGO) dataset. Water Water pollution related to agricultural practices is addressed in several NRCS programs which provide financial and technical assistance. Nutrient pollution caused by excessive nitrogen and phosphorus in farm surface runoff depletes oxygen levels and creates algal blooms in lakes, streams and rivers, harming aquatic life. Excessive sedimentation and pathogens from agricultural pollution can also have major impacts on water quality, and some NRCS projects focus on these problems with land owners and their water systems. Water management The practice of water management focuses on the efficiently controlling the flow of water while causing the least amount of damage to life and property. This helps to provide protection in high risk areas from flooding. Irrigation management is the most efficient way to use and recycle water resources for land owners and farmers. Drainage management is the manipulation of the sub-surface drainage networks in order to properly disperse the water to the correct geographical areas. The NRCS engineering vision is constantly making improvements to irrigation systems in a way that incorporates every aspect of water restoration. Water quality A team of highly trained experts on every aspect of water is employed by the NRCS to analyze water from different sources. They work in many areas such as: hydrology and hydraulics, stream restoration, wetlands, agriculture, agronomy, animal waste management, pest control, salinity, irrigation, and nutrients in water. Watershed program Under watershed programs the NRCS works with states, local governments, and tribes by providing funding and resources in order to help restore and also benefit from the programs. They provide: watershed protection, flood mitigation, water quality improvement, soil erosion reduction, irrigation, sediment control, fish and wildlife enhancement, wetland and wetland function creation and restoration, groundwater recharge, easements, wetland and floodplain conservation easements, hydropower, watershed dam rehabilitation. Plants and animals Plants and animals play a huge role in the health of our ecosystems. A delicate balance exists between relationships of plants and animals. If an animal is introduced to an ecosystem that is not native to the region that it could destroy plants or animals that should not have to protect itself from this particular threat. As well as if a plant ends up in a