Yousif, L.A. and Taha, M.B.
(2013)
Effect of seedbed preparation, sowing method and nitrogen fertilizer level on sorghum grain yield in rainfed areas, Gedarif, Sudan.
International Journal of Agronomy and Plant Production, 4 ((S)).
pp. 3864-3870.
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Abstract
Sorghum yield in mechanized rainfed areas of Eastern Sudan is low; however, there are
opportunities for yield improvement through managing cultural practices. A field
experiment was conducted for two consecutive rainy seasons, 2003 and 2004, in the
mechanized rainfed area northern Gedarif State, Sudan. The objective was to assess the
effects of seedbed preparation, seeding method and Nitrogen fertilizer level on sorghum
grain yield. The seedbed preparation methods were; untilled seedbed (T0) and tilled
seedbed (T1) by the conventional machine wide level disk (WLD) plow. The seeding
methods were, broadcasting by the WLD (M1) and row crop planter (M2). The Nitrogen
fertilizer levels were 0 (N0), 47.6 (N1) and 95.2 (N2) kg urea/ha. Split-split plot design with
four replicates was used with seedbed preparation as the main plot, seeding methods as
sub-plot and Nitrogen level as sub-sub plot. Sowing was done in the second and the
third week of July for the first and the second season, respectively. The fertilizer was
applied one month after crop emergence. The untilled seedbed significantly (P = 0.001)
out yielded the tilled seedbed by 58%. Seeding by the row crop planter increased grain
yield by 15% over WLD seeding method. The addition of 95.2 kg urea/ha significantly (P =
0.001) out yielded the 0 kg urea/ha by 49%. The effect of fertilizer was more noticeable in
the good rainy season (2003). The highest yield was obtained by the combination of
T0M2N2 (1912.8 kg/ha) and T0M2N0 (1025.5 kg/ha) for the two seasons, respectively.
Higher sorghum grain yield in the mechanized rainfed areas northern Gedarif State can
be achieved by using untilled seedbed, row crop planter and applying 95.2 kg urea/ha
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