Sunflower Yield, Water Use Efficiency and Soil Moisture Content as Affected by Irrigation Systems and Regimes in Old Land of Egypt CALIBRATION OF THREE COMMON FLOW MEASUREMENT DEVICES FOR OPEN CHANNELS Performance of rotating spray plate sprinklers Irrigation management and the production of sorghum under calcareaus soil evaluating the current system of onions storage in egypt SOME ENVIRONMENTAL PARAMETERS AFFECTING SWEET PEPPER GROWTH AND PRODUCTIVITY UNDER DIFFERENT GREENHOUSE FORMS IN HOT AND HUMID CLIMATIC CONDITIONS Physical and mechanical properties of some Egyptian onion cultivars