Comparison of irrigation performance based on management and ...

Even if the cane production per harvested
area in 2005/06 was higher in Metahara
(Fig. 4) than other cane producing schemes
output per units <strong>of</strong> harvested land (US$/ha)
was higher in case <strong>of</strong> Wonji than Metahara
(Fig. 2). This is because the end sugar
productivity was higher in Wonji than
others, i.e. 21.92, 15.98 and 15.77 tons <strong>of</strong>
sugar per hectare <strong>of</strong> harvested area
respectively in Wonji, Metahara and
Finchaa. Sugar produced per hectare per
month was also greater in Wonji followed
by Metahara and Finchaa which may be
attributed to the differences in the cutting
ages <strong>of</strong> the cane.
Fig. 3 shows the relationships between the
size <strong>of</strong> area harvested and the corresponding
cane production during the last 8 years
(1998/99 – 2005/06).
1400
Cane ( * 10 3 tons)
1200
1000
800
600
400
Wonji
Metahara
Finchaa
200
0
0 1000 2000 3000 4000 5000 6000 7000 8000
Area harvested (ha)
Fig. 3: <strong>Comparison</strong> <strong>of</strong> harvested area and cane production (1998/99 – 2005/06)
Annually harvested area and hence total
cane production is greater in Metahara sugar
estate followed by Finchaa and lowest in
Wonji. The regression coefficients (r 2 ) <strong>of</strong> the
relations given in figure 3 are 0.36, 0.004
and 0.88 for Wonji, Metahara and Finchaa
respectively. This shows that both harvested
area and cane production was not
significantly increased in Metahara and
Wonji. In case <strong>of</strong> these schemes, the points
showing the relationships between areas
harvested and cane production are
concentrated at almost same area. Within the
period 1998/99 – 2005/06 the total cropped
area has increase from 9911.5 ha to
10145.9ha in Metahara. This is an increment
<strong>of</strong> about 2.4%. However, the size <strong>of</strong>
harvested area was variable from year to
year without showing linear increase.
Figure 4 and 5 show the deviation <strong>of</strong> annual
production <strong>of</strong> sugar cane and cotton from
the overall average production <strong>of</strong> the
schemes involved in producing the same
crop during the last 9 years. While the
productivity <strong>of</strong> Wonji is consistently close to
the average line, the productivity <strong>of</strong>
Metahara scheme is greater than the average
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