GROSS MARGIN CALCULATION PER ACRE PER SEASON
Sweet potato
|
Item |
Unit |
Quantity |
Price/unit |
Value (Ksh) |
|
|
|
Yield: |
||||||
|
|
roots |
bag (large pcs) |
30 |
450 |
13.500 |
¾ large |
|
bag (small pcs) |
6 |
150 |
900 |
¼ small |
||
|
|
vines |
bag |
8 |
50 |
400 |
|
|
Total output |
|
|
|
14.800 |
|
|
|
Avoidable costs |
|
|
|
|
|
|
|
potato vines |
bags |
4 |
100 |
400 |
|
|
|
ploughing |
mdays |
24 |
50 |
1.200 |
|
|
|
harrowing |
mdays |
16 |
50 |
800 |
|
|
|
making mounds |
mdays |
18 |
50 |
900 |
|
|
|
planting |
mdays |
4 |
50 |
200 |
|
|
|
weeding |
mdays |
9 |
50 |
450 |
|
|
|
harvesting & cleaning |
mdays (2 bags per mday) |
24 |
110 |
2.640 |
|
|
|
Total avoid cost |
|
|
|
6.590 |
|
|
|
Gross margin |
|
|
|
8.210 |
|
|
|
Return to Labour |
|
|
|
149 |
ksh per manday |
|
Source: District Agriculture Office Kisii
Note figures in italics changed on basis of field survey in Mosocho
