2022 Missouri rice nitrogen trials
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"Materials & Methods: The flood-irrigated rice variety x nitrogen (VxN) trial was conducted at Portageville with two cultivars, RT XP753 and Diamond, four nitrogen rates (0, 80, 120, and 160 lbs N/ac), and two timings [single preflood and 2-way split with second application made at midseason (at least green ring stage and 4 weeks after preflood incorporation)]. One furrow-irrigated VxN trial was conducted in the top, middle, and bottom of the field at the Rice Farm and included CLL16 and DG263L with either 0 N applied, a single preflood application of 120 lbs N/ac, three applications of 46 lbs N/ac, four applications of 46 lbs N/ac, or 60 lbs N/ac applied at preflood timing, 60 lbs N/ac applied two weeks later, and 46 lbs N/ac applied one week after the second application. The second VxN trial in furrow-irrigated rice was altered due to space constraints and included DG263L under the same N management strategies as the other furrow-irrigated trial. However, there were two timings for the first N application, either at 4-leaf or 6-leaf stage, to determine the optimum time to initiate N fertilization in furrow-irrigated rice."--Page 2.
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