The net primary productivity for a temperate forest was measured as 2,000 mg c/m2/day. the respiratory rate of the community was determined to be 1,000 mg c/m2/day. what is the gross primary productivity for this community?

The general formula for calculating the net value is this
net = gross - deductions
The deduction is the respiratory rate
The net primary productivity is given
Solving for the gross primary productivity
gross = 2000 + 1000
gross = 3000 mg c/m2/day

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass