Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 4232 IREC Farmers' Newsletter No. 196 — Summer 2016 CROP SEQUENCING FOR IRRIGATED DOUBLE CROPPING Aerial view of the crop sequencing for double cropping trial at Leeton Field Station, August 2014. l  Cotton, as a single crop, had a much higher gross margin return per hectare and per megalitre than any other single commodity. This was due to a combination of high yield and high price in the season of the experiment. l  The crop sequence of fallow/cotton/faba bean/ fallow produced a higher gross margin return per hectare and per megalitre than any other cropping sequence. l  The canola/maize/faba/fallow sequence had the second highest gross margin return per hectare while the wheat/fallow/wheat/fallow sequence had the lowest gross margin return per hectare. NOTE: Commodity prices have changed considerably since writing this report and so make allowance for this when comparing gross margins. The evaluation of crop sequences for double cropping will provide information to enable irrigators to capitalise on their investment in irrigation infrastructure and farming systems. Tony Napier1, Luke Gaynor2, Daniel Johnston1, Glenn Morris1 and Michael Rollin3 1NSW Department of Primary Industries, Yanco 2NSW Department of Primary Industries, Wagga Wagga 3NSW Department of Primary Industries, Orange This article has been adapted from a paper presented at GRDC Grains Research Updates Griffith 27 July 2016 and Moama 28 July 2016. THE crop sequencing project aimed to identify and address some of the potential difficulties with double cropping systems, where a winter crop is grown directly after a summer crop (or vice versa). The project has addressed issues of herbicide residues, irrigation layouts and management, and stubble management, and quantified achievable crop yield and profitability. QUICK TAKE