How will you calculate net primary productivity?

What is net primary productivity?

What is primary production?

How much of the net primary productivity of a terrestrail ecosystem is eaten and digested by herbivores?

Justify the following statement in terms of ecosystem dynamics. "Nature tends to increase the gross primary productivity, while man tends to increase the net primary -productivity".

How will you calculate retention in a nutritional cycle?

State the relation between gross and net primary productivity.

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

Name the factor which affect the primary productivity?

Explain matric potential, solute potential and pressure potential. How will you calculate the water potential of cell contents?