🌱 Soil Column Evaporation: Richards Equation, Stage 1 and Stage 2 Drying with Lamp, Fan and Mulch

Interactive soil evaporation lysimeter: the one-dimensional Richards equation with van Genuchten-Mualem soils (sand, loam, silt loam, clay loam) under FAO-56 Penman-Monteith demand, showing energy-limited stage 1, soil-limited stage 2, mulch and a water table, with three in-page numerical checks.