Synergistic effect of nitrogen fixers and nitrogen fertilizer on wheat in sandy soil [electronic resource].

Includes reference.

Two field experiments on clay soil were conducted at the experimental farm of Sakha Agricultural Research Station, Kafr EI-Shelkh Governorate, during two successive seasons in 200612007 and 2007/2008 seasons for the monogerm variety sugar beet planting. The research devoted to carried out to design and locally manufactured perforated tubes system its calibration. Then Field experimental work to study the effective irrigation perforated tubes system with LASER land leveling technique at 0.1% slope (T1) and irrigation conventional method with traditional land leveling at 0.0 % slope (T2) under different cases of ridges (double furrows) lengths on the sugar beet produclion (yield and yield component) and its irrigation water relations [water application efficiency CNAE), water distribution efficiency CNDE) and water use efficiency CNUE)] under prevailing condition in Egyptian old valley due to: the first, saving of irrigation water is considered a strategically target of Egypt; the second, soil moisture is a major factor limiting sugar beet production and also, sugar beet plants consumes less water than sugar cane. The effects of applying such methods on advance and recession time and total water applied for sugar beet were considered. The obtained results showed that there were slightly deviation between outlets flow measured along the perforated tubes system designed and its recommended per each furrow. The uniformity distribution of flow through outlets along the perforated tubes system was about 92.8 %. The research recommended that using irrigation perforated tubes system with LASER iand leveling technique at 0.1% siope and the ridge (doUble furrows) length of 75 m gives a highest values of sugar beet production, root volume, sugar and root yield. Also, a highest values of WAE, WDE and WUE and saving about 46.3% of water application than conventional irrigation methods with traditional land leveling at 0.0% slope under three treatments of ridges (double furrows) lengths.

Summary in Arabic.

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