Cultivar comparisons were made by arranging plots in a randomized block design. Each plot
was planted on four 30-inch raised beds and were 25 ft long. The trials were considered to be
fully irrigated with water applied as needed by furrow. Irrigation scheduling was determined by
monitoring gypsum blocks placed in the soil at depths of 1, 2, and 3 feet. Moisture blocks were
read every two to three days and plots were irrigated when the average of the three moisture
blocks fell below 60. Seeding rate was 100,000 to 120,000 seed/acre (depending on year), and
fertilizer rate of N and P varied each year depending on soil test analysis. Soil at this location is
a silty clay loam. Each cultivar was harvested when grain reached the soft dough stage
(approximately 65% whole plant moisture). PS cultivars were harvested on the last harvest date
of the season. Corn hybrids were planted adjacent to the sorghum silage trial for comparison.
Corn was watered in similar manner as the sorghum based on gypsum block readings. The corn
was harvested when the milkline of each hybrid had advanced to ½ to 2/3 of the way down the
kernel. Details of cultural practices and other study information can be found at