NPP - GPP ratio among forest and models using fixed allocation schemes should taken into the account the possibility of such relevant inter annual variability.
1) Gross primary product is the total rate produced and NPP exists the remaining product.
Gross primary production (GPP) exists the total rate at which material exists produced and net primary production (NPP) exists the rate at which material exists accumulated in excess of respiration.
GPP - R = NPP
2) The value of NPP exists always Comparative lower and GPP exists higher.
The carbon use efficiency or ratio between net primary productivity and gross primary production , represents a convenient way to analyze the C allocation at the stand level.
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