What is primary productivity? Give brief description of factors that affect primary productivity.

It is defined as the amount of organic matter or biomass produced by producers per unit area over a period of time.
Primary productivity of an ecosystem depends on the variety of environmental factors such as light, temperature, water, precipitation, etc. It also depends on the availability of nutrients and the availability of plants to carry out photosynthesis.

For more answers visit to website:
https://www.tiwariacademy.com/ncert-solutions/class-12/biology/chapter-14/