Abstract
A (Factorial experiment), Expermant design was Completely Randomized (C.R.D.),2 × 4 × 3, which included 24 experimental units. It was carried out, during the growing season 2017-2018, in one fieldes of the Botanical Garden of the (Department of biology), in the College (Education for Pure Sciences - Ibn Al-Haytham), University of Baghdad. The research aimed to find out the effect of phosphate rock added to the plant growth medium, at the level of 5 grams, and the zero level that is adding phosphate rock (as a source of the element phosphorus) on some vegetative characteristics of the tomato plant, namely plant height, root length, wet and dry weight of the root and shoot group, Tomato plants grown in medium to which sodium chloride solution was added, and at concentrations of 50, 100 and 150 (mM.L-1), as well as the control treatment, which is the zero concentration of NaCl. The study confirmed the positive effect of adding phosphate rock, increasing the averages and values of the studied traits, increasing the plant's ability to withstand the stress of sodium chloride when adding phosphate rock, and reducing the effect of sodium chloride, which causes a significant decrease in the studied plant traits
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