Six experiments were initiated at 2002 and 2003 growing seasons at Agriculture Research Center (ARC), in El-Serw station, Giza, Egypt, to develop and integrated control system to weeds in rice fields. Results could be summarized as follow:At 30 days after planting with 100 % field capacity, E. crus-galli emergence (%) reached the maximum values of 90 and 84 %, respectively..The field capacity of 200 % decreased the emergence of E. crus-galli .but, C. difformis reached its maximum under the soil condition of 150 % followed by 200 %. While, the soil condition of 100 % and 50% were not proper for the emergence of C. difformis. whereas, E. geniculata was significantly increased with increasing time of observation after planting up to 60 days under 150 and 200 % field capacity condition.Emergence of E. crus-galli being higher in a short period between 15 to 20 days after planting in both seasons, while maximum emerged seedling of E. crus-galli were recorded at the planting date on first of May and reduced significantly when the planting time was delayed. Consequently, emergence of E. geniculata seedlings increased with delaying the planting date from mid of April to first of June. Early planting date of rice is an important integral part in suppressing E. geniculata. Also, maximum emergence of C. difformis for each planting date was occurred at 50 days with little change between the rates of emergence after 50 or 60 days in each planting date and maximum emergence of C. difformis were occurred when planting date was delayed to 1 st June.E. geniculata has allelopathic effects on the association weed of C. difformisw with increasing the number of emergence of E. geniculata, the performance of C. difformis was reduced.,and increasing the number of E. geniculata at 20 plants/ pot, the competetion effects were significantly increased

Two field experiments were conducted at the Experimental Station Farm in Kalabsho and Zayian Region, Faculty of Agriculture, Mansoura University during the two successive winter seasons of 2004/2005 and 2006/2007 to determine the effect of two irrigation systems (flooding and sprinkling), four nitrogen levels (60, 80, 100 and 120 kg N/fed) and foliar application with some commercial compounds (Nervatin-vet and Maxifert) as well as their interactions on growth, yield and its components and quality of wheat (Triticum aestivum, L.) Sakha 93 cultivar.The main results of this study can be summarized as follows:  Irrigation of wheat plants through sprinkling method significantly increased all studied characters as compared with flooding irrigation in both seasons.  Concerning the effect of nitrogen fertilizer levels the all studied characters were remarkably increased as a result of increasing nitrogen levels from 60 up to 120 kg N/fed in both seasons.  Application of foliar compound containing macro and micro elements (Nervatin-vet) resulted in a significant increased in grain yield and straw yields and its components as compared with the compound containing microelements alone (Maxifert) and control treatment in both seasons. Maxifert exceeded control treatment in all studied characters.It can be concluded that in order to maximizing wheat crop productivity it must be irrigated through sprinkling irrigation system and mineral fertilized with 120 kg N/fad as well as foliar fertilized with some commercial nutrient compounds that contain macro and micro elements such as Nervatin-vet under the environmental conditions of Kalabsho and Zayian district as a newly reclaimed sandy soils.