Growing degree graphs include cumulative lines for 1998 and normal. All graphs include vertical lines indicating planting, silking, and harvest dates, if available. General trends in precipitation and rainfall relative to normal are readily observed in the graphs. For more detailed information, a table is included with monthly totals and averages for the growing season. Comparisons of the current year's weather with long-time averages often help explain unusual plant development patterns and inconsistent performance of individual hybrids over years.
Explanatory information is given preceding data summaries for each test.
Tables 1-21 contain results from the standard corn performance tests. Hybrids are listed in order of increasing days to half silk and increasing grain moisture for the current year so hybrids of similar maturity appear together. The 1998 entrants and entries are listed in the Appendixes. Planting to stand enables evaluation of product performance for the entire growing season. The performance of the marketed product includes stand establishment as well as genetic yield potential.