🌱 Seedling Root-Zone Cross-Section: Water, Nutrient Uptake and Biomass Allocation Lab

A 3D soil cut-away where a seedling grows from seed: roots search five soil layers for water and nitrogen, sap flows up the stem, and the plant decides whether to spend its sugar on leaves, stem or roots under drought, shade, cold or poor soil, with water and nitrogen balances checked against closed forms.