1.Under what circumstances would you choose (a) completely randomized design, (b) randomized block design, and (c) Latin Square Design? What are the main disadvantages of Latin Square Design? [ARSE, 1977]
2.What is a design of experiment? What is the role of randomization and replication? Give the analysis of variance table for randomized block design and split plot design. Mention the different sources of variation and respective degrees of freedom. [ARSE, 1984]
3. (a) What are the experimental designs? List some designs for advanced testing of improved varieties.
(b) Highlight the importance of experimental error and discuss how it can be minimized.
(c) Suggest an experimental design to test performance of ten varieties at two levels of nitrogen and three sowing dates and present the analysis of variance. [ARSE, 1986]
4. Describe briefly the various principles of field experimentation.
5. Describe important features, merits and demerits of completely randomized design and randomized block design.
6. What is Latin Square Design? Describe briefly its main features, merits and demerits.
7. What is a lattice design? Give its merits and demerits.
8. Define augmented design. Describe its characteristics and applications in plant breeding.
9. Describe the main features, merits and demerits of experimental design which is used when fertility variation of the field moves in one direction.
10. What is the difference between treatment design and experimental design? Discuss the advantages and disadvantages of any three of the following experimental designs mentioning the situations where each of them could be adopted with advantage: (i) Randomized Block, (ii) Lattice, (iii) Latin Square, (iv) Augmented Design, (v) Split Plot, and (vi) Incomplete Block Designs. [ARSE, 2001]
11. Define Split Plot Design. Describe its main features, merits and demerits.
12. Which experimental design should be used when the fertility variation of a field moves in two directions? Give important characteristics, merits and demerits of such design.
13. Which experimental design would you adopt when treatments are such that some of them require larger plots and some require smaller plots? Discuss main features, merits and demerits of such design.
14. Narrate in brief the main features, merits and demerits of the experimental design which is used when the number of treatments forms square and is sufficiently large.
15. Explain briefly the experimental design which is used to test a large number of germplasm lines on a limited piece of land with limited seeds.
16. Discuss important features, merits and demerits of the experimental design which is used when experimental material is limited and homogeneous.
17. Give brief description of various criteria which are taken into account for comparison of experimental design.
18. Differentiate between the following:
(a) CRD and RBD
(b) RBD and LSD
(c) RBD and SPD
(d) LSD and SPD
(e) RBD and LSD
19. Write short notes on the following:
(a) Augmented design [ARSE, 1978]
(b) Least significant difference [ARSE, 1978]
(c) Covariance [ARSE, 1976, 1978]
(d) Random Error [ARSE, 1976]
(e) Replication
(f) Local Control
(g) Experimental Designs
(h) Randomization
20. Discuss the techniques and methods for increasing accuracy of field experiments in plant breeding. [ARSE, 2001]
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