In our previous video we saw that by the end of the season, there is no difference in the number of heat units and temperature as seen by a conventional versus a no-till soil. In fact any differences in cumulative heat units between the two systems disappears by the first week of July. In this video, SDSU’s Anthony Bly explains how that happens by examining the side-by-side temperature comparisons between a no-till, and conventional till system near Vermillion, South Dakota. In the latter part of the season (after July 1), we also see that in no-till soils maximum temperatures are consistently cooler and minimum temperatures are consistently warmer than conventional till soils. The NRCS’s Eric Barsness discusses this and tells us why it’s a good thing.
In this video, the USDA-NRCS’s (Brookings, SD) Eric Barsness and SDSU’s Anthony Bly discusses and experiment the NRCS conducted in Vermillion SD on a conventionally tilled and a long-term no-tilled field. Eric buried two temperature probes at 2” and the probes were able to record temperatures every 15 minutes over the entire growing season of 2016. This test is a nice example of how no-till and conventional till fields perform side by side and also show that, while there may be differences in the heat units (or growing degree days) at the beginning of the growing season, by the end of the season each crop received the same number of heat units.