Primary productivity is defined as:

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(D) Primary productivity is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthes

Vedclass · Accepted Answer

The amount of biomass produced per unit area over a time period by producers.

Vedclass · Answer

(D) Primary productivity is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.It is expressed in terms of weight $(g\,m^{-2}\,yr^{-1})$ or energy $(kcal\,m^{-2}\,yr^{-1})$.Therefore, option $D$ is the correct definition as it describes the rate of biomass production by producers.

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