Rate of biomass production is expressed as:

Step-by-step solution

The amount of biomass produced per unit area over a period of time is called primary productivity expressed in weight ( g – 2 ) or energy k c a l m – 2 . The rate at which this biomass is produced is called productivity. To compare the productivity of different ecosystems it is expressed by units g – 2 y r – 1 or k c a l m – 2 y r – 1 . It is divided into gross primary productivity and net primary productivity. The rate at which organic matter is produced during photosynthesis is gross primary productivity and the