الفهرس 
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Abstract
This work was conducted on summer squash during two successive summer season 2002 and 2003 at the Experimental Farm of Faculty of Agriculture, Suez Canal University, Ismailia. The objective of this work was to study the effects of plant density and nitrogenous fertilizer on growth, flowering, chemical components, yield and its components of squash. The chemical analysis was done on vines and fruits. The split-split plot system in a randomized block design with three replicates was used in both growing seasons. The nitrogen treatments were randomly located in the main plot while the sub-plot was devoted for the plant spacing and the plant density treatments were assigned to the sub-sub plots. The sub-sub plots area was 15.60 m2, which consisted of 6 ridges, 3.25m, length and 0.8 width.
The results were summarized as follows:
1- The highest number of leaves per plant at all samples at both seasons was obtained from the level of 350 kg ammonium sulphate, 75 cm and one plant per hill.
2- The highest value of vine length per plant at all samples at both seasons was obtained from the nitrogen level at 350 kg, 25 cm and two plants per hill.