# Which of the following expected to have the highest value (in gm/m$^2$ yr) in a grassland?

$\begin{array}{1 1}(a)\;\text{Net production(N.P)}\\(b)\;\text{Secondary production}\\(c)\;\text{Tertiary production}\\(d)\;\text{Grass production(G.P)}\end{array}$

Correct it to Gross production
Hence (d) is the correct answer.
edited Nov 29, 2017