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100			_aWijesuriya Wasana
245		0	_aMethods of data analysis for intercropping systems under rubber
260			_bJournal of the Rubber Research Institute of Sri Lanka _c2001
300			_a39-49
520			_aAnalysis and interpretation of intercropping experiments are complex due to inclusion of two or more crops. Moreover, various types of experiments are involved in intercropping systems. Therefore, it is not to be expected that a single statistical approach suits all kinds of problems. The basic objective in all intercrop experiemtns is to assess biological or agronomic advantage in any intercrop system. This paper suggests possible ways of analyses for combined benefit of rubber based intercropping systems during the immature stages of rubber by employing the proxy variables girth and girth increment to substitute for rubber yield. Moreover, several other indices viz. Income Equivalent Ration (IER) and Monetary Advantage (MA) have been modified to suit intercropping systems under rubber. For the Rubber-Tea intercropping system, Bivariate analysis and diagrams were made using rubber girth and tea yield. The proposed analyses can be employed to assess the beneficial/deleterious effect of intercropping in rubber based farming systems.
650			_aBivariate analysis
650			_aIER
650			_aIntercropping systems
650			_aLER
650			_aMA
650			_aPER
650			_aRubber
700			_aThattil R O
942			_cJS
999			_c62873 _d62873