2.1.1. Traditional tillage
Farmers in the tropics employ several traditional method of
seedbed preparation. Traditionally, weeds and bush re-growth are
slashed manually with cutlass and left on the soil as mulch or burnt
in situ. The land is then hand-hoed, often superficially. Farmers
also make mounds or ridges manually with hoes or with
equipment drawn by draught animals. Mounds ridges and other
forms of raised beds are widely used throughout the tropics. On
poorly drained soils in southeastern Nigeria, large mounds are
constructed. These are often 3–4 m in circumference and about
1 m high. Traditional tillage practices bury organic residues, to
slow down their decomposition and thus influence the microbial
population for a longer period. Surface residues, while modifying
soil temperature and moisture, have shorter life in consequence,
with all the associated effects (Mari and Changying, 2006).
2.1.1. Traditional tillage
Farmers in the tropics employ several traditional method of
seedbed preparation. Traditionally, weeds and bush re-growth are
slashed manually with cutlass and left on the soil as mulch or burnt
in situ. The land is then hand-hoed, often superficially. Farmers
also make mounds or ridges manually with hoes or with
equipment drawn by draught animals. Mounds ridges and other
forms of raised beds are widely used throughout the tropics. On
poorly drained soils in southeastern Nigeria, large mounds are
constructed. These are often 3–4 m in circumference and about
1 m high. Traditional tillage practices bury organic residues, to
slow down their decomposition and thus influence the microbial
population for a longer period. Surface residues, while modifying
soil temperature and moisture, have shorter life in consequence,
with all the associated effects (Mari and Changying, 2006).
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