If you have a square meter of soil with one plant and the plant photosynthesizes 2000 g of carbon per year and respires 1000 grams of carbon per year, what is the primary productivity of the square meter of soil?

Primary productivity = 1000 gm/year/sq. meter

Explanation:

Primary productivity is defined as the difference betweeen main gross manufacturing and breathing energy. For the herbivorous, this is the energy available.

It is expressed as "gm/year/sq. meter" = gm/yr/m^2

or "kcal/year/sq. meter" = k cal/year/m^2

In the present case,

Gross primary production = 2000 gm/yr/m^2

Used for respiration purpose = 1000 gm/yr/m^2

So, Primary productivity = (2000 - 1000) gm/year/sq. meter

Primary productivity = 1000 gm/year/sq. meter

river is shown in this type of map