owering below is from a study that examined the response by forbs (non-grass her

Question

owering below is from a study that examined the response by forbs (non-grass herbaceous figure plants) total vegetation to addition of nitrogen on burned and unburned airie plots. Shown is measured average biomass (g/m2) of each of the three vegetation classes ch treatment. TOTAL For RB GRASS 1986 1987 TOO ECO 500 200 C) 100 2 Boon 1938 1989 700 5OO 400 300 J 300 200 100 BURNED BURNED UNBURNED UNBURNED BURNED BURNED UN8URNED UNBURNED NITROGEN NITROGEN NITROGEN NITROGEN Source: Seastedt et al. 1991. Oe

Explanation / Answer

Nitrogen addition increase the aboveground net primary productvity ,inorganic nitrogen & nitrogen uptake. Decrease nitrogen response efficiency bt did not affect biomass weighes N conc.at community level

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