Koech, Richard and Raine, Steven R. (2010) The effect of irrigation non-uniformity on carrot production. In: Australian Irrigation Conference and Exibition 2010: One Water Many Futures, 8-10 Jun 2010, Sydney, Australia.
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Abstract
Field trials were conducted at three field sites in the Fassifern Valley to determine the effect of irrigation non-uniformity on carrot production. Catch cans were used to measure the distribution uniformity. The total seasonal water at each catch can position over the entire growing period was calculated by summing the depths for each irrigation and rainfall. Yield samples were then taken at each catch can position prior to harvest and compared with the total seasonal water. Options to improve irrigation performance using simulation modelling were identified.
The distribution uniformities of the solid-set and travelling gun systems evaluated were found to be lower than the suggested industry standard of 85%. The sampled yield across the three trial sites did not show any correlation with the total seasonal water, implying that carrot yield did not vary significantly with varying irrigation uniformity. This may have been caused by the unusually high rainfall during the season. The SPACE program was used to in identify the optimal configuration of the solid-set system, while the TRAVGUN program was used to identify the optimal lane spacing and sector angles for the travelling guns.
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