FIG. 1. Predicted relative yield (yield/yield_max) as influenced by the ratio of irrigation to pan evaporation (I/E₀) and electrical conductivity for the (a) Arava soil and (b) Millville soil with osmotic head that causes a 50% yield loss (₅₀) = –45 m and matric head that causes a 50% yield loss (h₅₀) = –15 m.