The reseeding of a previously planted area with additional desirable species of plants.

Additional courses outside those required for graduation.

Addition of oxygen to air to raise combustion efficiency, such as reverberatory furnaces, glass tanks, cupolas, etc.( 0301)

The addition of a nutrient to a processed food to replace losses of the nutrient that occurred during processing or to enhance its nutritive composition

The addition of specific amounts of iron, thiamine, niacin, riboflavin and folic acid to flour in amounts equal to, or exceeding, what is naturally found in whole wheat flour.

the addition of nutrients, such as nitrogen, phosphorus, or carbon compounds, into a lake or waterway to the point that the trophic state is greatly increased because of the stimulation of the growth of algae and other aquatic plants.

planting timber trees (either exotic or indigenous) in regenerating scrub.

The addition of nutrients (e.g., nitrogen, phosphorus, carbon compounds) from sewage effluent, agricultural or urban runoff, or other sources to surface water. Enrichment greatly increases the growth potential for algae and other aquatic plants.

Addition of a few young trees by planting to an area already established but not fully stocked. Differs from beating up because it is done after establishment.

The addition of nutrients to food, often to resore what has been lost in processing.

the addition of nutrients into a waterway; greatly increases the growth potential for algae and other aquatic plants.

Addition of nitrogen, phosphorous and carbon compounds or other nutrients into a water body, thereby increasing the potential for growth of algae and other aquatic plants. Most frequently, enrichment results from the inflow of sewage effluents or from agricultural run-off.