To calculate NPP, you take the total amount of carbon that the plant ​fixes​ (or turns into usable material) and subtract the amount of carbon lost during respiration. The total amount of carbon taken in by the plant is known as the ​gross primary productivity​ (GPP), and the amount of respiration is known as ​Ra​.

The overall productivity of a system can be found in an equation where the Net Primary Production, or NPP, is equal to the Gross Primary Production, or GPP, minus the Respiration, or R. The formula is the NPP = GPP – R. The NPP is the overall efficiency of the plants in the ecosystem.

Net primary productivity, or NPP, is gross primary productivity minus the rate of energy loss to metabolism and maintenance. In other words, it’s the rate at which energy is stored as biomass by plants or other primary producers and made available to the consumers in the ecosystem.

Net Primary Productivity (NPP), or the production of plant biomass, is equal to all of the carbon taken up by the vegetation through photosynthesis (called Gross Primary Production or GPP) minus the carbon that is lost to respiration.

Gross primary production (GPP) is the total rate at which material is produced and net primary production (NPP) is the rate at which material is accumulated in excess of respiration.

Net primary production (NPP) is strictly defined as the difference between the energy fixed by autotrophs and their respiration, and it is most commonly equated to increments in biomass per unit of land surface and time.

Gross secondary productivity (GSP) is the total energy or biomass assimilated by consumers and is calculated by subtracting the mass of fecal loss from the mass of food consumed. Net secondary productivity (NSP) is calculated by subtracting respiratory losses (R) from GSP.

Non crop plant biomass

1. Calculate the sum of the total non crop plant biomass (over species) at each station; calculate the mean total non crop plant biomass per plot.
2. Report for ANPP : mean total non crop plant biomass (g/m2/y), SE, with n=6 reps (blocks).

The basic formula for calculating productivity is a ratio of outputs produced to the inputs used in production. Productivity = Output / Input. There are so many different kinds of production processes and all these production processes have peculiar inputs which differ from one process to the other.

How to Calculate Productivity Rate. Productivity rate is the amount of output produced in an hour of work. Formula. Productivity rate is calculated as the total output of workers divided by hours worked.productivity = output / hours workedOutput is typically a dollar amount.

How to Calculate Labor Productivity Output Factors. The first step in measuring the labor productivity ratio comes in determining how to measure output. Input Factors. The other factor that goes into determining the labor productivity ratio is the amount of input the employee contributes. Calculating Labor Productivity Ratio. Uses for Labor Productivity Ratio.

A country’s labor productivity is a function of technological innovation, labor resources and capital investment. The formula for labor productivity is: Labor Productivity = Total Output / Total Productive Hours. Gross domestic product (GDP) is generally used as the measure of total output.