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Modified growing degree days with biofix: maximum temperature floor · case 05

Cold days produce negative degree days even though tmin is floored.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

days are [day_of_year, tmax_F, tmin_F]; only days with day_of_year >= biofix count. Each day clamps tmax to at most 86 and at least 50, tmin to at least 50 and at most 86, and adds (tmax+tmin)/2 - 50. Return [total rounded to 0.1, number of counted days].

Why this case matters

Pest spray timing and crop stage models accumulate GDD from a biofix date.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
season 0 biofix 91	`[74.5, 7]`	`[80.0, 7]`	Failed

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