الفهرس 
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Abstract
This investigation was carried out durried out during 2006 and 2007 on polianthes tuberosa cv. double grown in plastic pots of 30 cm diameter at antoniades research branch, horticulture institure, ministry of agriculture, alexandria, egypt. the study was a trial to investigate the effect of different levels of irrigation (100 % 80 %60 % 40 % and 20 % of the field capacity) and different rations of polyacrylamide (as a synthetic soil conditioner).