الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 202 |  |  |
| | | from | 202 | | |
Abstract
Two field experiments were executed in Gammalia district, Dakahlia governorate during the two summer seasons of 2003 and 2004, aiming to evaluate the effect of furrow irrigation techniques, nitrogen and potassium fertilization levels on grain yield, water use efficiency and nutrients uptake by maize (Zea mays L.) single cross 10. The used experimental design was split split plot design with three replicates, the main plots were furrow irrigation treatment which were: I1(conventional furrow irrigation technique (all furrows irrigated)),I2 (Alternate furrow irrigation technique (irrigating two furrows and let furrow)) and I3 (Alternate furrow irrigation technique (irrigating furrow and let furrow)). The sub plots were nitrogen fertilization levels i.e. 0, 60 and 120 Kg N fad1 as urea (46.5% N) and the sub sub plots were potassium fertilization levels i.e. 0, 10d 20Kg K fad1 as potassium sulfate (50% K2O). Results showed that the alternate furrow irrigation treatments saved huge amounts of irrigation water, Grain yield, and water use efficiency were increased under alternate furrow irrigation treatments, conversely increasing nitrogen and potassium fertilization levels led to improve both of them. Nitrogen uptake was promoted under alternate furrow irrigation treatment, on the other hand increasing nitrogen and potassium fertilization levels had a positive effect on nitrogen uptake. Phosphorus and potassium The highest phosphorus and potassium concentrations were attributed with traditional furrow irrigation technique, and it increased with fertilization with nitrogen and potassium. The least amounts of nitrate leaching were attributed with alternate furrow irrigation technique