Actual Growth
The plant growth factor quantifies the fraction of potential growth achieved on a given day and is calculated:
5:3.2.3
where is the plant growth factor (0.0-1.0), is the water stress for a given day, is the temperature stress for a given day expressed as a fraction of optimal plant growth, is the nitrogen stress for a given day, and is the phosphorus stress for a given day.
The potential biomass predicted with equation 5:2.1.2 is adjusted daily if one of the four plant stress factors is greater than 0.0 using the equation:
5:3.2.1
where is the actual increase in total plant biomass on a given day (kg/ha), is the potential increase in total plant biomass on a given day (kg/ha), and is the plant growth factor (0.0-1.0).
The potential leaf area added on a given day is also adjusted daily for plant stress:
5:3.2.2
where is the actual leaf area added on day is the potential leaf area added on day that is calculated with equation 5:2.1.16 or 5:2.1.17, and is the plant growth factor (0.0-1.0).
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