By Paul Starkey
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Extra info for Animal-Drawn Wheeled Toolcarriers: Perfected Yet Rejected : A Cautionary Tale of Development
In the early 197CIsthe Department of Agricultural Engineering of the MakerereUniversity made its own wheeled toolcarrier basedon the MAE design (Ker, 1973), but this did not progress beyond the prototype stage. 34 * Thus, while wheeled toolcarriers wereproven to be very effective onstation in Uganda, and while they were promoted for many years with generous subsidies,they did not passthe test of~farmeradoption in Uganda. 3,3 The Gambia In the early 196Os,interest in the newly developed wheeled toolcarriers spread from neighbouring Senegal to The Gambia.
Since 1974 there has been no further interest in wheeledtoolcarriers for The Gambia’. 1 Background Botswana is a sparselypopulated county in southern Africa with a variable semi-aridclimate which makes crop production risky and marginal. The combination of climate and soils results in only a few days each year that are suitable for land preparation so that farmers start cultivation assoon asthe ground hasbeen softenedby the rains. 31 . To achievi the necessarytillage in a short time they use wide mouldboard,plows pulled by teams of (i-8, animals, and sometimesas many as 16 cattle (bulls, oxen and cows) are hitched into a singleteam.
But for transport alone this tool is much better than the Tropiculteur. It has the best toolbar for sowing with seeder: attached, as it is a steerabletoolbar,” (Akou, 1975). The Tropiculteur package was about twice the price of the Polyculteur and was tested in several locations. At Arapai it was concluded that its additional cost was not justified, while at Serereits versatility wasparticularly appreciated, for with its high-clearance chassisit could be used for the spraying of cotton. The cheaperintermediate Ariana toolframe was also assessed,but at Arapai it was found to be diffiriit to control for planting and inter-row weeding, and since it was expensive compared with single purpose implements, it was concluded that its usefulnesswas limited (Kel, 1973).
Animal-Drawn Wheeled Toolcarriers: Perfected Yet Rejected : A Cautionary Tale of Development by Paul Starkey