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Abstract
Two fields experiments were achieved during the Nili season of 2017 and 2018 at Experimental Farm of Faculty of Agriculture, Fayoum University, Fayoum Gornorate to investigate the effect of soil humic acid rates (0, 25, 50 and 75 kg fed-1 ), foliar zinc oxide and nanoparticles zinc oxide concentrations (50 and 100 ppm) on tomato hybrid growth and productivity. The interaction between soil humic acid at 50 kg/fad. and foliar spray with zinc oxide at 100 ppm increased leaf area / plant and canopy dry weight / plant in the 2nd season. The interaction between soil humic acid at 50 kg/fad. and foliar spray with nanoparticles zinc oxide at 100 ppm increased fruit yield / pant, whereas the interaction between soil humic acid at 50 kg/fad. and foliar spray with zinc oxide or nanoparticles zinc oxide at 50 ppm of each increased early fruit yield and total fruit yield / fad. of tomato hybrid SV8320.
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