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

Question : What is primary productivity ? Give brief description of fa

1.	Question : What is primary productivity ? Give brief description of factors that affect primary productivity.
Answer» Solution :The amount of biomass or organic matter produced per unit area over a time period by plants during PHOTOSYNTHESIS is called primary productivity. Factors affecting them are as follow : (a) Sunlight : Sunlight is seen more in tropical regions. While sunlight is less in polar regions so there is more productivity in tropical regions than polar regions. (b) Temperature : Due to cold atmosphere of WINTER, there is more productivity in tropical regions than in temperate forest. (C) Nutrients : The presence of proper amount of nutrients are NECESSARY for growth of plants and productivity of ecosystem.