The substantial range of tillage and seeding equipment is outlined in Tillage and Seeding Machines, EOLSS on-line, 2002) and summarized in Tables 5 and 6. Broadcast seeding and seed drilling are classical methods that are popular for sowing cereals (wheat, barley and oats) into cultivated soil.
The lower tillage intensity in Africa may simply reflect the abundance of land: in order to maximize labor productivity, people work thinly over a large area. Under the substitution view, the profitability of mechanization and its contribution to economic growth depend on the opportunities available to workers (and sometimes draft animals) released from their tasks.

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The substantial range of tillage and seeding equipment is outlined in Tillage and Seeding Machines, EOLSS on-line, 2002) and summarized in Tables 5 and 6. Broadcast seeding and seed drilling are classical methods that are popular for sowing cereals (wheat, barley and oats) into cultivated soil.
The lower tillage intensity in Africa may simply reflect the abundance of land: in order to maximize labor productivity, people work thinly over a large area. Under the substitution view, the profitability of mechanization and its contribution to economic growth depend on the opportunities available to workers (and sometimes draft animals) released from their tasks.

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