Response of some Egyptian cotton cultivars growth, yield and fiber quality to different sources of nitrogen fertilizers and foliar zinc application

Two field experiments were carried out in Agricultural Research and Experimental Station, Faculty of Agriculture, Cairo University, Giza, Egypt (2019 2020) to study the response Egyptian cotton cultivars (Giza 92, Giza 94 95) growth, yield fiber properties foliar zinc (Zn) rates (0, 100 200 ppm) nitrogen (N) fertilizers sources; urea (U), ammonium nitrate (AN) sulfate (AS).  Cultivars, N sources Zn led a significant effect on plant height, number sympodial branches plant-1, total open bolls boll weight, seed index, fed-1, strength, fineness. While, had position 1st node, lint%, length uniformity index. 95 was superior above parameter except index quality. 92 Significant two three interactions between studied factors existed most traits. Whereas, highest values obtained from plots treated with AS at ppm cases. relationships found percentage plant-1; R2 = 0.76 92), 0.89 94) 0.91 95). Also, fed.-1 weight lint% (R2 0.862, 0.632 0.619, respectively). In such experimental soil conditions could be recommended improve properties.