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Chapter 3
MATERIÀtS ÀND METHODS
3 "
1 DESIGN
3.1.1 Sample selection and data collecLion
À representative sample of households was selected from rural population
of Sidama awraja, which is organized into Farmers Àssociations
(r¡s). A three stage stratified sampling technique was used to obtain a
representative sample. For the first stage, 19 sub-strata were used ,
which were identified by administrative area and by ecological zones.
Sidama Àwraja had 7 woredas and 3 ecological zones. The latter was
identified by artitude and production of staple crops. The highrand
zone vlas characLerized by crops such as barley and enset(false-banana),
lhe middre-land by coffee, teff, and pulses, and the lowland by sorghum,
maize, and teff.
The respective altitudes were: above 2000 m, between
500 and 2000 m, and less than 500 m. In sidama Awraja, 5 of the woredas
represent all the lhree ecological-zones ( 1 S sub-strata ) ,
and the
remaining 2 represent 2 ecological-zones each (4 sub strata). For the
second stager Farmers Associations were randonly selected from each of
the 19 sub-strata proportionally based on the number of households in
each stratum. One hundred Farmers' Àssociations were sampled from a
total of.492. For the Lhird stage,30 households r+ith children under 5
years of age were randomly selected fron each Farmers'Àssociation (f¡).
From each of the selected FÀ, 30 households were surveyed covering a
total of 3000 households out of the esLimafed totat of 209,000. The
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