الفهرس 
Soil water regime as affected by amount and freauencv of irrigation waterOnly 14 pages are availabe for public view
 |  | from | 187 |  |  |
| | | from | 187 | | |
Abstract
The study was carried out during 1991, 1992 and 1993 growing seasons in Sakha Agricultural Research Station, Kafr El-Sheikh Governorate, Egypt. The aim of this work was to: 1. Analyze the regime of the water table and its contribution to consumptive use of different crops. 2. Determining the soil water plant relations such as crop evapotranspiration (ETJ, , crop coefficient adjusted for the contribution of water table (K,,), soil moisture extraction pattern and the optimum irrigation efficiency. 3. Find out the optimum irrigation water for a complete crop rotation in the studied area. 4. Study the effect of frequency and amount of irrigation water on the yield and its quality of both sugar beet and sunflower crops. Sunflower (Helianthus annuus L.) as summer crop followed by sugar beet (Beta vuglaris L.) as winter crop were chosen in agricultural cycle. The rotation was repeated for two years. Sowing dates of sunflower were June 5, 1991 and June 20, 1992. While the corresponding dates of sugar beet were Nov. 19, 1991 and Oct. 16, 1992 for first and second year respectively. All cultural practices were the same as recommended for the area except the irrigation parameters under study. These parameters were the depths of applied irrigation water and irrigation intervals. Dates of harvesting for sunflower were Sep., 15, 1991 and Sep., 30, 1992. While those of sugar beet were June 5, 1992 and May 5, 1993. The experiment was arranged in split plot design with four replicates. The main plot was assigned as water application depth treatment, while the sub plot treatment was the irrigation intervals. Each plot was 7 x 7.5 m (52.5 m2 - 1/80 faddan).