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

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

What is primary productivity? Give brief description of factor that affects the primary productivity.

What is primary producitiy? Give brief descreption of factors that affecr primary productivity.

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

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

What is primary production?

What is net primary productivity?

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

What is primary production ?

What is net primary productivity ?