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Crop
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Table 10
Estim ated crop yields under intensive farming in the Lubero test area
Reference
yield
(kg/ha)
Consumable yield (kg/ha)
S l ,l (86) S I,2 (80) S2 (52) Valley soils
W heat 3,000 2,237 2,075 1,319
Beans (peas) 2,600 1,973 1,832 1,177 2,600
Maize 2,400 1,818 1,688 1,094 2,400
W hite potatoes 18,000 13,632 12,660 8,124 —
Sweet potatoes 18,000 13,932 12,960 8,424
presents an assessment of the yields which may be expected under intensive
agriculture. Similar yields have been obtained in fertilizer experiments, but
are lower than potential yields simulated from climatic data (Sys 1991).
Table 11 summarizes the assessment of the number of food portions of
2,220 Kcal that the area may produce. A distinction is made between portions
exported as wheat and portions available for the local population.
Suitability
class
Table 11
N um ber of food portions of 2,220 Kcal produced per km 2 under intensive farming
in the Lubero test area
Cultivable
surface area
(ha)
Farm
size
(ha)
Number
o f farms
Daily energetic
value of the
farm
(Kcalories)
Daily energetic
value of the
suitability class
(Kcalories)
Number of
food portions
of 2,220 Kcal
S l,l 30.91 1.1 28.1 24,853 698,369 314.6
S I,2 23.12 1.1 21.0 23,161 486,381 219.1
S2 4.63 1.1 4.2 15,264 64,109 28.8
Total/m ean 58.66 1.1 53.3 23,431 1,248,859 562.5
N um ber of food portions related to the com m ercial wheat crop
S l,l 28.1 7,221 202,910 91.4
S I,2 21.0 6,704 140,784 63.4
S2 4.2 4,256 17,875 8.0
162.8
Remains : 399.7