Figure 1 Agro-climatic diagnostic charts for a Sahelian
site in Niger (upper) and a Sudanian site in Burkina Faso (lower)
with variables occurring during the three central CODE-WA project
years (2008-2010). doy = Julian day; yellow line = long term
reference period 1951 2009; green line = current reference period
1991-2009; red line = dry reference period 1971-1990; blue line =
wet reference period 1951-1970.
Figure 2 Average grain yield of pearl millet (A) and
cowpea (B) with and without wood ash microdosing (2g per pocket) on
terrain types differentiated by farmers at the Sahelian site Warzou
in Niger. Statistically significant differences at p=0.05
occur only between treatments for pearl millet yields on Jigawa
terrain and between Jigawa and Jampali terrain types. The last
group of bars corresponds to the average of the values for the
three terrain types.
Figure 3 The Opposite Pyramid Approach taking pearl
millet variety testing as an example.