How will you calculate the net primary productivity(NPP)?

R-GPP=NPP GPP-R=NPP NPP=R-GPP None of these.

GPP-R=NPP

Gross primary productivity minus respiration losses (R), is the net primary productivity (NPP). GPP – R = NPP Net primary productivity is the available biomass for the consumption to heterotrophs (herbiviores and decomposers).