Effects from nitrogen fertiliser timing and irrigation deficit on irrigated cotton – Narrabri 2017/18

Abstract

Key findings •• Spilt application of nitrogen (N) fertiliser increased lint yield in cotton for two differing irrigation deficits compared with the entire amount of N being applied pre-plant. •• Applying the total N fertiliser pre-plant increased N loss from the field via the tail water. •• The 70 mm irrigation deficit had a greater effect on lint yield than the 50 mm deficit. •• The 70 mm deficit with a split N application had the highest irrigation water use efficiency (IWUE).