Growth, yield and water use of Thompson Seedless grapes under basin and drip irrigation

Field experiments were conducted to study the response of Thompson Seedless grapes to different evaporation replenishment rates under drip and basin irrigation systems. Drip irrigation recorded marginally higher yields compared to furrow irrigation, although the differences were not significant. Fruit yields were highest with 100% evaporation replenishment rate. The water use with drip irrigation was 25% less compared with furrow irrigation. Soil-moisture extraction under furrow irrigation in the 0–30 cm soil depth was more with 50 and 75% evaporation replenishment rates, whereas 75% of the soil moisture extraction was in the 0–45 cm layer with 100% evaporation replenishment.