A field study was conducted to evaluate existing irrigation management practices in small-scale farm holdings in northwest Ethiopia. In this study, the effect of furrow length, as well as flow rate on irrigation performance, crop yield, and water use was studied. The field experiment was arranged in a split plot design; furrow length as main plotand flow rate as sub-plot. Each treatment has three levels; 10, 25, and 40 m furrow lengths and 0.4, 0.6, and 0.8 L/s flow rates. Irrigation performance indicators are: application efficiency, Ea, storage efficiency, Es, distribution uniformity, DU, runoff fraction, Rf, deep percolation fraction, Df, yield, Y, water use efficiency, WUE. The effect of furrow length was statistically significant (p<0.05) on all performance indices except Es and flow rate has shown significant effect on all performance indices (p<0.05). The ranges of measured values of Ea, Es, DU, Rf, and Df were18-34%; 46-80%; 93-98%; 81-95%; 11-57%; and 25-47% respectively. Both furrow length and flow rate had a significant effect on yield and WUE at p<0.05. The ranges of crop yield and WUE found in the study were 17-32 t/ha and 2.1-4.1 Kg/m3 respectively. Crop yield and WUE have shown a decreasing trend as furrow length increases and increases as flow rate increases.
|Number of pages||11|
|Journal||International Agricultural Engineering Journal|
|Publication status||Published - 2009|