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Table 3 Effects of contour ridge tillage on the production of sorghum varieties in Cinzana commune, Mali

From: Optimizing yield of improved varieties of millet and sorghum under highly variable rainfall conditions using contour ridges in Cinzana, Mali

    Mean values and comparisons
Year Technique Varieties Variety Technique Variety × technique
a. Grain yield (kg ha−1)      
2012 CRT Seguifa 621a a  
   Jacumbe (local) 381b   
  Control Seguifa 545a a  
   Jacumbe (local) 297b   
SE    43.5   
Probability    0.01 0.56 0.97
CRT yield increase     96  
2013 CRT Jacumbe(local) 1174a a  
   Seguifa 1231a   
   Tiandougou 1600a   
  Control Jacumbe(local) 677b b  
   Seguifa 704b   
   Tiandougou 786b   
SE    287   
Probability    0.39 0.04 0.62
CRT yield increase     613  
2014 CRT Seguifa 1957b a  
   CSM 219 1353c   
   Sangatigi 2300a   
   Kenikeni (local) 1134cd   
  Control Seguifa 1200cd b  
   CSM 219 928de   
   Sangatigi 1333c   
   Kenikeni (local) 819e   
SE    81.6   
Probability    0.001 0.001 0.001
CRT yield increase     616  
    Mean values and comparisons
Year Technique Varieties Variety Technique Variety × technique
b. Straw dry biomass (kg ha−1)      
2012 CRT Jacumbe 3524a a  
   Seguifa (local) 6857a   
  Control Jacumbe 3943a a  
   Seguifa (local) 5000a   
SE    1407   
Probability    0.08 0.49 0.29
CRT yield increase     −167  
2013 CRT Jacumbe 5057a a  
   Seguifa (local) 4457a   
   Tiandougou 4143a   
  Control Jacumbe 3314a a  
   Seguifa(local) 3429a   
   Tiandougou 3486a   
SE    958   
Probability    0.92 0.06 0.88
CRT yield increase     1142  
2014 CRT Seguifa 10452a a  
   CSM 219 8007a   
   Sangatigi 9543a   
   Kenikeni (local) 7558a   
  Control Seguifa 6027b b  
   CSM 219 4937b   
   Sangatigi 5873b   
   Kenikeni (local) 5273b   
SE    445   
Probability    <0.001 <0.001 0.97
CRT yield increase     3363  
  1. NB For a given year, values with different letters are statistically different at P = 0.05. Column means represent tillage techniques and row means the varieties. SE standard error of the mean