Comparative evaluation of crop performance in selected grain sorghum (Sorghum bicolor (L.) Moench) cultivars
1981
Pitter, M.S.
Considerable variability in grain yield, grain protein and forage yield existed among the many early or medium maturity sorghums (Sorghum bicolor (L.) Moench) studied. The hybrids were generally the higher yielders, but some relatively high-yielding inbred lines and an ordinary variety were also identified. Grain yields were greater in the ratoons than plant crops and indications are that selected high-yielding lines can be cultivated instead of some hybrids. Differences in terminal yield components, harvest index, threshing percentage, total dry matter (TDM) production, remobilization and capacity for storage of labile carbohydrates, crop growth rates, leaf area indices, leaf efficiencies and nitrogen assimilation were among the plant factors responsible for yield variability in the sorghums whereas moisture and nitrogen supply and plant density variations were the major environmental components influencing yield. An optimal plant density for the sorghums may well exceed 222,000 plants/ha
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