Emissions Reduction Fund: ‘fertiliser efficiency in irrigated cotton’ method

The Department of Environment has been busy over the last year making new greenhouse gas emissions reduction methods available for use under the Emissions Reduction Fund (ERF). A number of these are designed to benefit the farming sector, including a ‘fertiliser efficiency in irrigated cotton’ method released in December 2014.  

Water running short? How do we manage our irrigations?

When water is limited growers may need to change from their normal irrigation practice to optimise yield, quality and water use efficiency. As with fully irrigated production, the aim is to limit or minimise the amount of stress on the crop. Cotton’s response to water stress depends on the stage of growth that stress occurs, the degree of stress and the length of time the stress is present.

Late season irrigation management

Many crops, particularly in the northern regions, are fast approaching cutout. Cutout occurs when the plant has 4-5 nodes above white flower (NAWF) and generally occurs late January to mid February. This is the time of the last effective flower which can be used to plan irrigations after cutout.  End of season water requirements can be determined by estimating the number of days until defoliation and predicting the amount of water likely to be used over this period.

Last effective flower and cut out dates