mededelingen der zittingen bulletin des seances - Royal Academy ...

S3-land : 5.9 ha
Rotation crops and fallow (14 plots of 0.15 ha)
T o ta l...........................................................................
Number of farms : 2.3
Surface area of valley soils per farm : 0.017 ha
2.10 ha
2.50 ha
The expected consumable yields are given in table 21. Table 22 summarizes
the results and indicates the number of food portions of 2,220 Kcal that the
area may produce under traditional farming with full respect of the environment.
Table 21
Estim ated crop yields under traditional farm ing in the South Kivu test area
Crop Reference yield
(kg/ha)
Consumable yield (kg/ha)
S I (81) S2 (64) S3 (48)
Bananas 12,000 8,748 6,912 5,184
Cassava 14,000 10,206 8,064 6,048
Sweet potatoes 10,000 7,290 5,760 4,320
Cocoyam 10,000 7,290 5,760 4,320
Beans 1,000 689 536 392
Maize 1,200 845 672 489
Sorghum 2,600 1,876 1,478 1,104
Table 22
N um ber of food portions of 2,220 Kcal produced per km 2 under traditional farming
in the South Kivu test area
Suitability
class
Cultivable
surface area *
(ha)
Farm
size
(ha)
Number
of farms
Daily energetic
value of the
farm
(Kcalories)
Daily energetic
value of the
suitability class
(Kcalories)
Number of
food portions
of 2,220 Kcal
SI 12.67 1.9 6.6 15,955 105,303 47.4
S2 31.00 2.2 14.0 12,888 180,432 81.3
S3 5.92 2.5 2.3 9,625 22,137 10.0
Total/ mean 49.59 2.16 22.9 13,444 307,872 138.7
* The valley (m arsh) soils are excluded.
Intensive farming
The conditions of intensive farming in South Kivu are similar to those
discussed above for the Butembo and Lubero areas. This means : adequate
soil conservation measures ; a correction of the soil cation balance by appli-