Trend free Designs for Animal Experiments under Two Sources of Heterogeneity
Authors: Arpan Bhowmik, Seema Jaggi, Eldho Varghese, Sunil Kumar Yadav, Mohd. Harun and Anindita Datta

Designing an experiment which is an essential component of any scientific investigation and need to be done carefully, forms the basis for testing any hypothesis with acceptable degree of precision. While, designing an experiment, experimenter need to investigate many factors like objective of the study, availability of resources, cost of experiment, heterogeneity or variability in the experimental material etc.
Through proper designing of an experiment, the heterogeneity in the experimental material, which is an important problem to be dealt with, can be taken care by grouping of experimental material in such a way that units within the group are more homogenous as compare to between the group. In agricultural and allied experiment, there may be one source of heterogeneity or may be more than one source of heterogeneity. Heterogeneity in more than one direction within the experimental material is very common particularly in animal experiments. Following is an experimental situation:

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About Author / Additional Info:
• Working as a scientist from 2012
• published around 45 research papers in national and international journals of repute
• served as resource person in different institute
• received IARI merit medal for outstanding academic performance in Ph.D.
• received Dr. G.R. Seth young Scientist Award-2015 by Indian Society of Agricultural Statistics
• Received Krishi Vigyan Gaurav (honorary title) by ARCC and BKAS
• Received International Travel Support from SERB to participate in a conference in Costa Rica