Fig. 4. Yield (Y) response to combined salinity and excess boron. Experimental (symbols) and computed (lines, assuming a dominant factor model) results for tomato grown in greenhouse lysimeters and date palm grown in field lysimeters in the Arava, Israel. From Ben-Gal and Shani (2002) and Tripler (2004). The term Y_m is maximum yield, and EC is electrical conductivity.