two wheel tractors using private sector based supply chains in zimbabwe: discussion of options
TRANSCRIPT
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Two Wheel Tractors using Private Sector based supply chains in Zimbabwe: discussion of options
Introduction
Farm power for field operations in the context of Zimbabwe’s agriculture has historically been limited to
manual, animal traction and four wheel tractor based systems. Two wheel tractors are a new form of on-
farm power in the country. The FACASI project brings with it the concept of applying two wheel tractors to
conservation agriculture using private sector based supply chains. One of the primary tasks of the FACASI
project in Zimbabwe is to demonstrate to farmers, potential contractors, private sector supply chain actors
and policy makers that two wheel tractors are another option for farm power. Comparative costs between
the Animal traction based conventional tillage systems and two wheel tractor CA based systems are being
analysed with farmers and some of the preliminary findings are as discussed in the sections below.
Discussion area 1 Entry point costs
The entry point level costs for a two wheel tractor/single row Fiterrelli planter combination crop
establishment system as shown in Table 1 is higher than that of animal traction based conventional tillage
and no till systems by only 8.5% and 7.7 % respectively. The same two wheel tractor single row planter
combination is 7.9% and 9.3% is the cost of the smallest conventional four wheel tractor conventional
tillage system and no tillage combinations respectively.
Table 1
Basic kit costs
Animal traction based conventional tillage
systems
Animal traction based CA system
Two wheel tractor CA based systems
Component Cost $ Component Cost $ Component Cost $
Power source
4 oxen @ 500/ox
2000
4 oxen @ 500/ox 2000
Two wheel 12Hp tractor (ATA)
2000
Primary and secondary tillage
Mouldboard plough
(Zimplow))
130 no till planter (Grownet)
600
Crop establishment
Conventional planter
(Zimplow)
450 Single row planter (Grownet)
800
Total Kit Costs
2580 2600 2800
Note: All prices are in USD
Basic kit costs
Two wheel tractor CA based systems
4 wheel tractor Conventional system
4 wheel tractor CA system
Component Cost $ Component Cost $ Component Cost$
Power source Two wheel 12Hp tractor
(ATA)
2000
60 Hp two wheel drive tractor
(Bain)
21,000 60 Hp two wheel drive tractor
(Bain)
21,000
Primary and secondary
2 Disc plough (Bain)
2500
2
tillage Disc harrow (Bain)
3090
Crop establishment
3 row planter (Bain)
9000 3 row No till planter
9000
Total Kit Costs Total costs 35,590 30,000
Discussion area 2: Timeliness of operation
The capacity of two wheel tractor based no till planting technology is at least 9 fold that of conventional
tillage animal traction based crop establishment systems. The same two wheel technology is at least 50%
higher as compared to animal traction based no till planting technologies on the market. Of interest is the
fact that the two wheel tractor/two row Fiterrelli no till combination has a capacity of 40.7% of that of a
60HP no till planter despite having an initial cost of only 20% of the later.
*8 hrs for ploughing with draft animals is normally spread over three days as the daily duty cycle for
oxen is 6 hrs.
**Available time is less than the 30 day planting period. Within the small holder farming sector in
Zimbabwe, one day in a week is set aside as ‘Chisi’ day in which the local leadership does not allow
people to work in the fields. The planting season begins with the rainy season which means of the
remaining 6 days in a week you have a chance of interruption of field operations from the rains.
Effectively you work with a 4-5day week equating to a 20 operational days for a month.
***The capacity of two wheel tractor based no till planting technology is based on an 8 hour day
even though the tractor has a 24hr duty cycle.
Table 2
Timeliness of operations
Animal traction based
conventional tillage
systems
Animal traction
no till system
Two wheel
tractor no till
systems (single
row planter)
Two wheel
tractor based
systems (double
row planter)
4 wheel tractor
Conventional system
4 wheel tractor CA system
(3 row planter)
Ploughing time (h/Ha) *18hrs N/A N/A N/A 4 N/A
Discing time (h/Ha) N/A N/A N/A 0.8 N/A
Seed and basal fertiliser establishment time (h/Ha)
4 4
3 2 0.85 0.85
Total time to establish a hectare (h/Ha)
22 4 3 2 5.65 0.85
**Potential capacity (hectares planted) given a 30 day planting period (Ha)
5.5
30
53***
79.5
29.4
195
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Table 3
Duty cycle (maximum recommended usage time of power source per day)
Animal traction based conventional tillage systems
Animal traction based CA system
Two wheel tractor based systems
4 wheel tractor Conventional
system
4 wheel tractor CA system (3 row planter)
*Maximum recommended operational hours per day for power source
*6 hrs
*6hrs
**24hrs
***24 hrs
***24 hrs
*The maximum recommended daily operational time for draft animals in Zimbabwe is 6hrs made up
of three hours early in the morning and three hours late in the afternoon. The time in between is
reserved for the feeding of the draft animals. Daily output of one such unit is therefore limited to
what can be done in the 6 hours.
**The duty cycle for two wheel and four wheel tractors is based on that of the diesel engine which is
24hrs per day
The two wheel tractor technology offers a significantly higher duty cycle than animal based systems.
Daily output is therefore limited only by the management capabilities of the operators and not
power source as in the case of animal traction based systems
Discussion area 3 Labour productivity
The two wheel tractor/single and double row planter combinations offer significantly higher labour
productivity levels as compared to both animal traction options and the four wheel tractor
conventional tillage systems. The two wheel tractor/single row planter combination has a higher
labour productivity level than the two wheel tractor/double row planter system.
Table 4
Labour productivity (for crop establishment operations)
Animal traction based conventional
tillage systems mh/Ha)
Animal traction based
CA system
mh/Ha)
Two wheel tractor based systems (single row planter)
mh/ha)
Two wheel tractor based
systems (double row
planter) mh/ha)
4 wheel tractor Conventional
system (3 row planter)
mh/ha)
4 wheel tractor CA system
(3 row planter)
mh/ha)
Ploughing 36 N/A N/A (N/A) 4 N/A
Discing N/A N/A N/A N/A .8 N/A
Planting 8 8 3 2 0.85 0.85
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Totals *44 8 **3 ***4 5.65 0.85
*An animal traction team requires at least two people, one leading the animals to maintain straight
lines and the second controlling the implement (plough or planter). The operational time for each
animal traction based activity is therefore multiplied by 2 to derive the input for man hours for the
same operation.
**A two wheel tractor/single row planting system requires one operator and therefore the
operational time is the same as the required man hours.
*** The two wheel/two row Fiterrelli planter combination requires at least two people with one
operating and the second lifting and lowering the coulters at the headlands.
Discussion area 4 Energy costs in crop establishment
Fuel consumption levels for establishing a hectare of a crop (maize) are a fraction of those of
conventional and no till four wheel tractor options.
Table 5 Fuel consumption data
Two wheel tractor based systems (with a two row
Fiterrelli tractor)
(L/Ha)
4 wheel tractor Conventional
system (80 Hp)
(L/Ha)
4 wheel tractor CA system
(3 row planter)
(L/Ha)
ploughing N/A **30 N/A
Discing N/A **18 N/A
Planting *6 **15 **15
Total per Hectare 6 63 15
* Measured fuel consumption data from a 4 Hectare block in Macheke
** Planning fuel consumption data from the University of Zimbabwe commercial farm
General Discussion
1. The two wheel tractor single row Fiterrelli planter combination has entry level costs that are
approximately only 10% more than those of animal traction based conventional and no till
systems but with a 9 and 2 fold increase in crop establishment productivity over the same
systems respectively. Labour productivity of the two wheel tractor single row no till planter
combination is 14.7 and 2.7 times that of animal traction based conventional and no till
planters systems respectively.
Lowering entry point costs for a technology with the benefits of high capacity and improved
labour productivity is critical in promoting its adoption by farmers and contactors as the money
is often borrowed against some form of collateral. The shift from animal traction based crop
establishment systems to two wheel based systems can be achieved with minimal increase in
capital costs.
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2. Entry level costs for the two wheel tractor single row Fiterrelli planter combination are pegged
at US$2800 in Zimbabwe. Loan collateral requirements in Zimbabwe are prohibitive but the
procurement value is within the widely available salary based loans. A standard salary based
loan for $2800 spread over a two year repayment period equates to a monthly repayment of no
more than $150. Zimbabwe has a large number of rural based professionals such as teachers,
nurses policeman etc. who have access to such loan facilities. Is this not an additional business
model to consider?
3. Animal traction based systems need extensive grazing infrastructure support systems. Given the
low carrying capacity of most small holder lands (3-5Ha/livestock unit) in Zimbabwe and the fact
that a standard conventional tillage crop establishment team is composed of 4 oxen, extensive
areas are set aside for grazing to sustain draft power. The two wheel tractor/single row
combination, with more or less the same entry point costs as the animal draft based kit, offers
the opportunity for the country to make the shift, at nominal cost increases, and therefore
release land from grazing. We can then consider alternative land use systems(for the grazing
land) which are more viable or address pressing social issues to do with land access inequalities
resulting from population increases and the insatiable demand for cropping land in the country .
4. Labour productivity in conventional animal traction based systems is estimated at 44 md/Ha
(man days per hectare) which is very high compared to that of 3md/Ha for a two wheel tractor
no till system. Is this not the low entry level alternative which would release labour and allow
farmers the choice of what to do with their spare time or does this new option create greater
unemployment within the agricultural sector?
5. Estimates of fuel consumption data indicate the two wheel tractor no till crop establishment
combination uses 9.5% and 40% of diesel fuel per hectare that of 4 wheel conventional and no
till combinations respectively. There is a huge potential for reducing energy costs in crop
establishment and consequently improve on farmer margins.
6. In an environment in which markets for agricultural produce have been opened up to
international competition, increasing producer prices to maintain farmer margins is not a
sustainable option for Government. The alternative is to introduce interventions/innovations
which lower crop production costs and specifically those related to mechanisation. A
combination of low entry procurement costs, which reduce depreciation, interests and
insurance costs, and low operational costs (high labour productivity, low energy costs, high
work rates) which are all attributes of the two wheel tractor based no till technology appear to
offer great scope in improving farmer viability.
The writer is the FACASI Project Country Coordinator for Zimbabwe and can be reached at [email protected]