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The 3-dot hyperacuity task was given to two subjects under three experimental paradigms: constant luminance, constant energy and constant duration. Hyperacuity was obtained under conditions (3 dots, 2 msec exposure) which rule out any significant temporal or spatial averaging. There was a clear threshold decrease in the constant luminance paradigm as(More)
Peanut (Arachis hypogaea L.) and cotton (Gossypium hirsutum) plants were grown for 4 weeks in saline, isoosmotic rooting substrates with different proportions of K and Na. Isoosmotic media did not affect growth (except at the highest external K concentrations) or estimates of intracellular osmotic pressure in expanding leaves (i.e. osmotic pressure of leaf(More)
A two-year study was conducted in the Negev region of Israel, using the drip method, to determine the effect of four levels of water quality (EC =1.0, 3.2, 5.4 and 7.3 dS/m) in combination with three soil amendment treatments (gypsum spread on the soil surface along the drip laterals after planting, injection of H2SO4 into the water during each irrigation,(More)
No quantitative information is available regarding the salt tolerance of eggplant (Solanum melongena L.). The present study was conducted over a two-year period in small field plots irrigated by drip, where irrigation frequency was also a variable. The salt tolerance function may be described by the equation Yr=100–6.9 (ECe−1.1), where Yr=relative yield of(More)
The line-source sprinkler system provides a water application pattern which is uniform along the length of the plot and continuously variable across the plot. A double line-source system is described which makes it possible to determine simultaneously the response functions for two factors — salinity and water — and their interaction, on a relatively small(More)
The effect of irrigation interval on the relationship between yield and the salt concentration of irrigation water salinity was studied on eggplant (Solanum melongena L.) in 5 × 6 m plots irrigated by a trickle irrigation system. Three levels of irrigation water salinity, having electrical conductivities of 1.5, 4.5 and 10.0 dS · m−1, and five irrigation(More)