Effect of number of seed metering devices in the wide level disc on the yield of three crops in the mechanized rainfed areas. Gedarif State
2009
Yousif, L.A., Agricultural Research Corporation, Gedarif Research Station, Gadarif (Sudan), Agricultural Engineering Program
The objective of this research work was to determine the optimum number of seed metering devices in the wide level disk (WLD) seeder box for maximurn yield of sorghum, pearl millet and sesame crops. Five treatments of number of seed metering devices (fluted wheel type) were used. These were 5 (practiced by farmers), 6, 8, 12 and 17 seed metering devices. Three experiments were conducted for two consecutive seasons (2004/05 and 2005/06). The WLD seeder was calibrated to give a seed rate of 7.6, 4.3 and 3.3 kg/ha for sorghum, pearl millet, and sesame, respectively. Data were collected on plant population, plant height, number of heads or Capsules and final yield. There were no significant differences between treatments on sorghum and pearl millet grain yields. The combined analysis showed that 8 seed metering devices gave the highest yield for the three crops, while 5 seed metering devices gave the highest yield for sorghum and pearl millet. The correlation coefficient (r) between the treatments and the yield of sorghum, pearl millet and sesame, were 0.62, 0.29 and 0.38 for the three crops, respectively. Accordingly, it could be concluded that it is best to use 8 seed metering devices for higher yields for the tested crops
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