Export Sales and Shipments for the period March 17-23, 2023  Wheat:  Net sales of 151,700 metric tons (MT) for 2022/2023 were up 21 percent from the previous week, but down 40 percent from the prior 4-week average. Export shipments of 377,500 MT were up 4 percent from the previous week, but down 6 percent from the prior 4-week average.  Corn:  Net sales of 1,036,400 MT for 2022/2023 were down 67 percent from the previous week and 34 percent from the prior 4-week average. Export shipments of 668,200 MT were down 52 percent from the previous week and 37 percent from the prior 4-week average.  Soybeans:  Net sales of 348,200 MT for 2022/2023 were up noticeably from the previous week and up 36 percent fr...