26 Questions
What is the main focus of the text?
Assessing the yield advantages of intercropping
Which situation requires the full yield of the base crop and some yield of the intercrop?
Situation 1
In which intercropping situation does the combined intercrop yield need to exceed the higher sole crop yield?
Situation 2
What were the row spacing for soybean and maize in the sole treatment?
$45 cm \times 60 cm$
In the 1:1 replacement series treatment, what was the sown proportion of soybean and maize?
50:50
What was the grain yield of maize in the sole treatment?
85.19 q/ha
What is the most important index of biological advantage according to the text?
Replacement series LER
What is the formula for calculating the Land Equivalent Ratio (LER)?
LER = (Yield of maize in intercrop / Yield of maize in sole crop) + (Yield of pigeonpea in intercrop / Yield of pigeonpea in sole crop)
What does an LER value greater than 1 indicate?
Yield advantage
What does the RYT of two species equal to?
Sum of the relative yields
According to the text, what does LER take no account of?
Relative durations of each species within the intercrop or sole crop systems
What does LER < 1 indicate?
Yield loss
Which index gives an accurate assessment of the biological efficiency of intercropping?
Replacement series LER
What is the formula for calculating RYT?
$RYT = \frac{Y_{ab}}{Y_{aa}} + \frac{Y_{ab}}{Y_{bb}}$
Which objective do indices such as RYT and RCC serve?
Advantage of intercropping
According to the text, what is LER a measure of?
Production efficiency of different systems by convening the production in terms of land acreage
What does the Land Equivalent Ratio (LER) measure?
The competitive abilities of the component crops
What does an LER value greater than 1 indicate?
Yield advantage
Which index gives an accurate assessment of the biological efficiency of intercropping?
Land equivalent ratio (LER)
What is the most important index of biological advantage according to the text?
Index of Biological Advantage Relative Yield Total (RYT)
What does the RYT of two species equal to?
$Y_{ij}Y_{jj} + Y_{ik}Y_{kk}$
According to the text, in which intercropping situation does the combined intercrop yield need to exceed the higher sole crop yield?
Situation 2: Combined intercrop yield must exceed the higher sole crop yield
What is the main focus of Willey's 'Intercropping—It’s Important and Research Needs'?
Studying the different situations for intercropping advantage
What does the Land Equivalent Ratio (LER) measure in intercropping?
The productivity of intercropping compared to monocropping
What is the formula for calculating the Relative Yield Total (RYT) in intercropping?
$RYT = (Yield of intercrop)/(Yield of monocrop)$
What does a Land Equivalent Ratio (LER) value greater than 1 indicate in intercropping?
Intercropping is more productive than monocropping
This quiz covers the criteria for assessing yield advantages in intercropping, based on Willey's research on competition and yield advantages. It includes different situations such as providing full yield of base crop and some yield of intercrop, and the combined intercrop yield exceeding the higher sole crop yield.
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