The question then arises how P. oceanica meadows manage apparent very low nutrient availability to produce high quantities of living matter; for example the P. oceanica seagrass bed of the Revellata Bay displays a net primary production of about 230 gC m-2 year-1[ 5, 7].
The smart, sustainable and inclusive growth adopted by Europe 2020 demands new types of information as it is the land use data as an indicator of the land (a primary production factor) - the building block of any economy.
The latter more precise estimate yielded an annual primary production of 146 g C m− 2 y− 1.
Globally, biomass has an annual primary production of 220 billion oven-dry tons (odt) (Hall and Rosillo-Calle 1998) and India produces nearly 370 million tons of agricultural, forest/biomass wastes per year (Pappu et al. 2007).
Production of those materials today is generally a byproduct of something else, and not a result of primary production of the elements themselves.
Chemical plants fix more atmospheric nitrogen than all natural terrestrial processes combined, and fisheries remove more than a third of the primary production of the temperate coastal waters of the oceans.
The carbon use efficiency (CUE), defined as the ratio of net carbon gain to gross carbon assimilation during a period, is a highly significant determinant of primary production of terrestrial plant communities.
It seems clear that urea may be an important player in primary production of this highly impacted lagoon, under limited inorganic nitrogen conditions.
As a consequence of this process, primary production of vegetation on the valley floor decreased.
Primary production of a gas-condensate reservoir followed by lean gas recycling is considered.
