Agriculture & Environmental
Crop Growth (Sigmoid)
B = Bmax / (1 + e^(-(GDD-50)/8))

Accumulated biomass follows an S-curve against thermal time: slow establishment, a near-linear grand-growth phase, then a plateau as the canopy closes.
Computed & rendered in pure C# on the frozen OnlyCSharp 1.8 library — animation baked to GIF with the library's own
Gif encoder (no GPU, no ffmpeg, no external packages).