Data Acquisition System for Scheduling Irrigation. II. Irrigation Scheduling of Wheat Crop*

(Mushari A. AL-Naeem and Mahmoud H. Ramadan )

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Abstract

Two growing seasons of wheat crop were conducted. The field experiments on each growing season were divided into two parts, one for the basin irrigation treatments and the other for the center pivot irrigation treatments. Experiments were carried out at the Experimental Research Station  at King Faisal University, AL-hassa, Saudi Arabia. 
The basin irrigation treatments were in a split plot design and four replications. The irrigation intervals occupied randomly the whole plots and the water volumes occupied randomly the sub-plots. The basin experiments included three irrigation intervals: 5, 10 and 15 days and three irrigation volumes per irrigation: 400, 600 and 800 m3/ha/irrigation (i.e. 4, 6 and 8 cm total irrigation depth per each watering respectively).
The center pivot irrigation experiments were in a random block design with four replications and four treatments. The four irrigation treatments were 2400, 4800, 7200 and 9600 m3/ha/growing season (i.e. 24, 48, 72 and 96 cm total irrigation depth/growing season respectively). 
Plant growth characters (plant height, Leaf Area Index) at tillering stage and at the yield formation stage were quantified under different treatments. The Proline content (drought indicator) in plants tissues were also measured. The yield components, the biological yield, the harvest index and the water use efficiency were also estimated under different treatments. 
* Series No. I can be seen in Reference No. 20

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