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The objective of this work was to evaluate the use of both singleand triple-row production systems in two drip-irrigated sweet corn cultivars under dry Mediterranean climate conditions. A two-year field experiment (2017 and 2018) was carried out in clay loam soil. The following three combinations spacing between crop rows and drip-line lateral spacing, with three replicates for each cultivar, were applied: single rows at 75 cm spacing, with one drip-line lateral spacing for each crop row; single rows at 75 cm row spacing, with one drip-line lateral spacing for three crop rows; and triple rows, 37.5 cm apart, on 225 cm centers, with one drip-line lateral spacing for each triple row. The responses of both cultivars were similar. In addition, husked cob yield and irrigation water use efficiency (IWUE) significantly reduced as the drip-line lateral spacing increased in single rows. Yield loss was 35.2% in relation to the 75 cm spacing. However, when the triple-row system with 225 cm drip-line lateral spacing was adopted, yield and IWUE were noticeably improved, and the yield loss was moderated to 16%, due to the improvement in soil water conditions in the triple rows. For improved yield and IWUE, the combination of triple rows with the 225-cm drip-line lateral spacing is an efficient drip-irrigated planting pattern for sweet corn production in dry Mediterranean climate conditions.

Triple-row system with a wider drip-line lateral spacing for two drip-irrigated sweet corn cultivars