Yam Ontology 
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Concept details
| Key | Value |
|---|---|
| method_id | CO_343:0100236 |
| method_name | Duration between 5% emergence and 95% senescence of subplot - Computation |
| ontology_id | CO_343 |
| ontology_name | Yam |
| method_class | Computation |
| method_description | Averaged growth cycle duration expressed in days between 5% emergence and 95% senescence (i.e. 5% of maximum ground cover after time to maximum ground cover) in two subplots. Ground cover computed from weekly images analysis. Median senescence computed from inflection point value using log-logistic time-to-event modeling of weekly sprout counts expressed in days after planting. Time at 5% of maximum growth after time at maximum growth computed via inverse regression of time to event Beta ground cover dynamic model. |
| formula | Fraction_of_Emerged_Sprouts_at_time_t=Maximum_Emergence_Fraction/(1+exp(-Slope_Around_Inflection_Point*(log(t)-log(Median_Emergence_Time)) Time_From_Emergence=Nb_Of_Days_Since_Planting-Median_Emergence_Time Ground_Cover=Maximum_Ground_Cover*(1+(Time_From_Emergence_To_Maximum_Ground_Cover-Time_From_Emergence)/(Time_From_Emergence_To_Maximum_Ground_Cover-Time_At_Inflection_Point))*(Time_From_Emergence/Time_From_Emergence_To_Maximum_Ground_Cover)^(Time_From_Emergence_To_Maximum_Ground_Cover/(Time_From_Emergence_To_Maximum_Ground_Cover-Time_At_Inflection_Point)) Inverse regression of Ground_Cover model using Ground_Cover=5% and Time_From_Emergence > Time_From_Emergence_To_Maximum_Ground_Cover |
| language | EN |
| created_at | 2022-11-07-09:06:33 |