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        mGPP[i] = 0.; mUPAR[i]=0.;
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        mGPP[i] = 0.; mUPAR[i]=0.;
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    }
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    }
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    mEnvYear = 0.;
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    mEnvYear = 0.;
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}
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}
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/** calculate the GPP


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/** calculate the stand-level NPP


          

          

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  @ingroup core


          

          

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  Standlevel (i.e. ResourceUnit-level) production (NPP) following the 3PG approach from Landsberg and Waring.


          

          

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  @sa http://iland.boku.ac.at/primary+production */


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  @sa http://iland.boku.ac.at/primary+production */


          

          

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double Production3PG::calculate()


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double Production3PG::calculate()


          

          

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{


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{


          

          

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    Q_ASSERT(mResponse!=0);


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    Q_ASSERT(mResponse!=0);


          

          

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    // Radiation: sum over all days of each month with foliage


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    // Radiation: sum over all days of each month with foliage