ISSN: 0041-3216

ISSN: 0041-3216 (Online), 0041-3216 (Print)
Volume 66 Number 4
Research Papers
Concept of monetary equivalent ratio and its usefulness in the evaluation of intercropping advantages
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The monetary equivalent ratio (MER) measures the economic advantage of intercropping over the sole crop that has the largest economic return. When the yield advantage of an association of cassava-cowpea-maize was assessed, the economic advantage of intercropping was only 6-14% (MER= 1.06-1.14) even though the agronomic advantage ranged 12-63% when assessed with the land equivalent ratio (LER = 1.12-1.63). In a cassava-okra-maize-cowpea association, the agronomic advantage ranged 2-25% (LER = 1.02-1.25). The MER indicated no economic advantage and the efficiency of the system was only 50-62% of the most economic sole crop, which was cassava. The implications of these findings on the design of intercropping experiments are discussed.
Keywords: Land equivalent ratio; Monetary equivalent ratio; Multi-storey intercropping; Competition indices; Row intercropping; Strip intercropping; Substitutive model