The top five yielding commercial grain sorghum varieties evaluated at each of the two locations were compared to obtain an indication of the degree of consistence performance these top hybrids were able to maintain. The lower the score the higher the hybrid ranked in the two trials as show in Table 2. Texas Seed TS 489 ranked second in one trial and third in the other, while producing an average yield of 5,075 pounds per acre, and earned the index ranking of 2.5. The variety Pogue PS 233, ranked first in one trial and fifth in the other, it produced an average of 5,107 pounds per acre and earned an index ranking of 3. These were the top indexing varieties in the 1999 Nueces County test plots.
Producers are often reluctant to try new varieties due to uncertainty about performance.
As the cost of grain production continues to increase the need for consistently higher yielding grain varieties becomes a necessity. The comparison of yield performance in multiple tests provides data needed to indicate performance consistence in newly introduced hybrids. This data summary was developed to provide area sorghum growers with information that can be used to make sound grain sorghum variety selection decisions based on yield performance in Nueces County. Index Ranking Score represents a given variety's average ranking in these two major trials conducted in the County. The lower the number the higher the variety ranked in these trials.