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Agronomy QUESTION #2033
Question 1
The Land Equivalent Ratio (LER) in intercropping is calculated as:
  • \(LER = \dfrac{\text{Yield of sole crop A}}{\text{Yield of sole crop B}}\)
  • \(LER = \sum \dfrac{\text{Yield of component crop in intercrop}}{\text{Yield of same crop in sole crop}}\)✔️
  • LER = Total intercrop yield ÷ Average of sole crop yields
  • \(LER = \dfrac{\text{Intercrop total yield}}{\text{Higher yielding sole crop yield}}\)
Correct Answer Explanation
LER is computed as the sum of partial LERs: \(LER = \dfrac{Y_{AB}}{Y_A} + \dfrac{Y_{BA}}{Y_B}\), where \(Y_{AB}\) and \(Y_{BA}\) are yields of crops A and B in the intercrop, and \(Y_A\), \(Y_B\) are their respective sole crop yields. LER > 1 indicates a yield advantage from intercropping.