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Two field experiments were carried out at Mallawi Agric. Res. Station, EL-Minia Governorate, in 2005 and 2006 seasons. The aim of this investigation was to evaluate effects of some foliar nutritional treatments; Urea (2%), Magic (2%); Nofatrein (1L/fad); and Potassin N (1L/fad) and soil-applied N at rate of 30 kg N/fad on growth and productivity of mid-season poorly grown cotton plants of Giza 83 cultivar. Foliar treatments were applied twice; at early flowering stage and 3 weeks later, while the supplemental soil N were applied as one dose at early flowering stage. A randomized complete block design with four replicates was used. The main findings could be summarized as follows: The results showed that the supplemental soil-applied N dose was the only treatment which gave a consistently significant increases in leaves content of chlorophyll, plant height, numbers of main stem nodes, fruiting branches, open bolls and total fruiting sites per plant, number of nodes above yellow flower and seed cotton yield per faddan in both seasons but it significantly decreased earliness percentage in comparison with the control in both seasons. All used foliar treatments significantly increased leaves content of chlorophyll and exerted increases in plant growth and productivity but the significance level was not always reached in comparison with the control. No significant differences were observed among the four foliar treatments used in this study in both seasons. It could be concluded that supplemental soil N dose of 30 kg N/fad at early flowering stage was more effective in enhancing vegetative growth, delaying cut-out and reducing yield loss of mid-season poorly grown cotton plants as compared with two sprays of any nutritional compound used in this study.

journal of plant production

0AMELIORATIVE EFFECTS OF SOME NUTRITIONAL TREATMENTS ON MID-SEASON POOR VEGETATIVE GROWTH AND ITS CONSEQUENT PREMATURE CUT-OUT OF N-STRESSED COTTON PLANT