Verdant evapotranspiration

Verdant evapotranspiration answers the oldest question in gardening and farming: how much water does my crop actually need, and when? It is built entirely on FAO-56, the United Nations reference method used by agronomists worldwide. Enter a day's weather — temperatures, humidity, wind and sunshine — and Verdant evapotranspiration computes reference evapotranspiration with the full Penman-Monteith equation: extraterrestrial radiation from your latitude, clear-sky radiation, net longwave losses, vapour pressure deficit, every step shown with its equation number. Then it goes further. Pick a crop and a soil, and Verdant evapotranspiration builds the crop coefficient curve across four growth stages, steps a daily root-zone water balance, and tells you the day your plants will start to stress — before they show it. Each irrigation is scheduled at a trigger depth you control, converted to…