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Evaluation of yield stability in intercropping: Studies on sorghum/pigeonpea

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Relation http://oar.icrisat.org/6338/
http://dx.doi.org/10.1017/S0014479700010796
 
Title Evaluation of yield stability in intercropping: Studies on sorghum/pigeonpea
 
Creator Rao, M R
Willey, R W
 
Subject Pigeonpea
Sorghum
 
Description Data from 94 experiments on sorghum/pigeonpea intercropping were examined for evidence that the stability of yield is greater with intercropping than sole cropping. Stability of the major component (sorghum) was examined by calculating the distribution of yields; stability of the overall intercropping system was examined by calculating coefficients of variation, by computing regressions of yield against an environmental index, and by estimating the probability of monetary returns falling below given ‘disaster’ levels. All these approaches have some merit; taking the last as an example, it was found that for a particular ‘disaster’ level quoted, sole pigeonpea would fail one year in five, sole sorghum one year in eight, but intercropping only one year in thirty-six. Intercropping gave yield advantages under a wide range of environmental conditions and there was no significant evidence that advantages were greater under stress. This is discussed in relation to possible mechanisms contributing to greater yield stability
 
Publisher Cambridge University Press
 
Date 1980
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/6338/1/S5%20%20%202044.pdf
Rao, M R and Willey, R W (1980) Evaluation of yield stability in intercropping: Studies on sorghum/pigeonpea. Experimental Agriculture, 16 (2). pp. 105-116. ISSN 0014-4797