Last year, our PFR data on in-furrow sugar applications revealed that there was a correlation between planting date and yield response. More accurately, we hypothesized that in-furrow sugar applications at later planting dates worked more consistently because there was greater soil biological activity at the warmer soil temperatures. When testing this theory in 2018, we did not observe the same correlation with planting date which was likely due to the abnormally warm early spring we experienced at most locations. Further testing is required to determine if soil temperature changes the efficacy of in-furrow sugar applications. In addition, our initial testing does not reveal any benefit to rates greater than 4 lb./A.
Travis Burnett | PFR Agronomist