Abstract
Two tomato (Lycopersicon esculentum Mill.) cvs. Agriset 761 and Equinox, were grown in spring and fall 1996 with two microirrigation rates 1x (HI) and 0.75x (LO) of the open pan evaporation and sprayed either weekly or biweekly with Anti-Stress 2000 (acrylic polymer) at 2.33 L·ha–1 in 280 to 561 L·ha–1 H2O during the first 10 weeks of the season. Tomato yields were similar with HI or LO irrigation rate and with antitranspirant sprays or water control. In both seasons, `Equinox' had a higher early but lower seasonal total marketable yield than `Agriset 761' (P ≤ 0.05). Residual soil concentrations of NO3-N and K were higher (P ≤ 0.05) with the LO, than with HI irrigation rate.
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