Generally, descriptions of how crops are assessed to determine the optimum time for windrowing/swathing are very vague. Industry published guidelines recommend windrowing canola when 40–60% of seed on the main stem has changed colour, to optimise yield and oil content, yet current Australian practice tends not to follow this guideline. Compounding this issue is that ‘Colour change’ means different things to different people, yet understanding the term ‘colour change’ is crucial to avoid potentially significant production and economic penalties.
This survey of 900 growers highlights the different habits, beliefs and attitudes growers have as to the ‘optimal’ time to windrow, and sets a base for establishing best practice guidelines.
SE Australia Survey Report 2013 - Windrowing canola
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