Construction of Constant Block-Sum Designs through Confounded Factorials


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Authors

  • Anurag Rawat The Graduate School, ICAR-Indian Agricultural Research Institute, New Delhi
  • Sukanta Dash ICAR-Indian Agricultural Statistics Research Institute, New Delhi
  • Med Ram Verma ICAR-Indian Agricultural Statistics Research Institute, New Delhi
  • Anil Kumar Indian Council of Agricultural Research, Krishi Bhavan, New Delhi

https://doi.org/10.56093/jisas.v80i01.182012

Keywords:

Balanced Incomplete Block Design; Treatment contrast; Confounding; Factorial experiments.

Abstract

This article focus on concept of constant block-sum designs through confounded factorial. Confounded factorial designs are shown to provide a rich 
class of constant block-sum designs. The approach given by Khattree (2022) provides a direct and straightforward proof of the necessary condition 
for existence of constant block-sum designs. Based on this the method of construction of constant block-sum designs through confounded factorial 
given by Gupta (2022) is also mentioned. Some designs given by Gupta (2022) are estimated at different values, along with that some more designs 
based on various effects confounded in different replications are presented to show existence and non-existence of constant block-sum designs in 
different replications.

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References

Bansal, N. and Garg, D.K. (2022). Construction and existence of

constant block sum PBIB designs. Communications in Statistics - Theory and Methods, 51(7), 2231-2241.

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Khattree, R. (2018b). The parshvanathyantram yields a constant-sum

partially balanced incomplete block design. Communications in

Statistics - Theory and Methods, 48(4), 841-849.

Dey, A. (1986). Theory of Block Designs. 1st Edition, John Wiley and

Sons, New York.

Gupta, S. (2022). Constant block-sum designs through confounded

factorial. Statistics and Applications, 20(2), 93-101.

Khattree, R. (2018a). A note on the nonexistence of the constant block

sum balanced incomplete block designs. Communications in

Statistics - Theory and Methods, 48(20), 5165-5168.

Khattree, R. (2019). On construction of constant block-sum partially

balanced incomplete block designs. Communications in Statistics – Theory and Methods, 49(11), 2585-2606.

Khattree, R. (2022). On construction of equi-replicated constant block

sum designs. Communication in Statistics-Theory and Methods,

51(13), 4434-4450

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Submitted

2026-07-28

Published

2026-07-28

Issue

Section

Articles

How to Cite

Anurag Rawat, Sukanta Dash, Med Ram Verma, & Anil Kumar. (2026). Construction of Constant Block-Sum Designs through Confounded Factorials. Journal of the Indian Society of Agricultural Statistics, 80(01), 9-19. https://doi.org/10.56093/jisas.v80i01.182012
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