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Mujahid Khan Ramesh Chander Hasija Des Raj Aneja Manish Kumar Sharma

Abstract

The aim of this study was to estimate the optimum block size with the shape for field research experiments. A uniform crop of Indian mustard (Brassica juncea L.) variety RH-749 was raised during 2013-14 rabi season over an area of 48m × 48m (2304 basic units) at Research Farm of Oilseed section, Department of Genetics and Plant Breeding, CCSHAU, Hisar, Haryana, India. The harvesting of crop was done in small units each of size lm × lm (1m2). The blocks of sizes 4, 6, 8, 12 and 24 plots with various shapes, for different plot sizes were considered. The coefficient of variation (CV) decreased from 10.66 to 3.89 with the increase in block size from 4 to 24 , indicating that as the block size increased, homogeneity within the block also increases and the blocks elongated in E-W direction were more effective in reducing error variation than those elongated in N-S direction. It was also observed that C.V. without blocking (20.04) was much higher in comparison with the C.V. with blocking (3.89), thus indicating that blocking was beneficial in reducing error variation. The 24 plot blocks were found to be most efficient with 12m × 2m block shape. Rectangular blocks are also advisable either when the experimenter does not have any idea about the fertility pattern of the experimental area or when border effects are large.

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Keywords

Blocking, Efficiency, Optimum block size, Optimum block shape, Uniformity trial

References
Agarwal, K.N. and Deshpande, M.R. (1967). Size and shape of plots and blocks in field experiments with dibbled paddy. Indian Journal of Agricultural Sciences. 37 (6) : 445-455.
Agnihotri, Y. and Agarwal, M.C. (1995). Uniformity trials for determination of optimum size and shape of plots/ blocks for experimentation with Acacia catechu. The Indian Forester. 121(8).
Agnihotri, Y., Agarwal, M.C. and Kumar, N. (1996). Size and shape of plots and blocks for field experiment with Eucalyptus in Shivalik Hills. Indian Jour. Forestry. 19 (1) : 74-78.
Handa, D.P., Sreenath, P.R. and Rajpali, S.K. (1995). Uniformity trial with Lucerne grown for fodder. Grass and Forage Science. 50 (3) : 209-216.
Kumar, A., Pandey, V., Shekh, A.M., Dixit, S.K. and Kumar, M. (2008). Evaluation of crop soybean (Glycine max [L] Merrill) model under varying environmental condition. American-Eurasian Journal of Agronomy. 1 (2): 34-40.
Leilah, A.A. and Al-Khateeb, S.A. (2007). Convenient quadrat size, shape and number in the desert rangeland of Saudi Arabia. Pakistan Jour. Agric. Res. 20 : 62-70.
Lucas, L.G. (2007). Field plot techniques for cotton experiments. M. S. Thesis, University of Philippines, Los-Baos.
Masood, M.A. and Javed, M.A. (2003). Variability in field experiments in maize crop in Pakistan. Pakistan J. Agric. Sci. Faisalabad. 40 (3-4) : 207-209.
Masood, M.A. and Raza, I. (2012). Estimation of optimum field plot size and shape in paddy yield trial. American- Eurasian Journal of Scientific Research. 7 (6) : 264-269.
Smith, H.F. (1938). An empirical law describing heterogeneity in the yields of agricultural crops. Journal of Agricultural Science. 28 : 1-23.
Storck, L., Filho, A.C., Lopes, S.J., Toebe, M. and de Silveira, T.R. (2010). Experimental plan for single, double and triple hybrid corn. Maydica. 55 : 27-32.
Taye, G., Tarekegne, A. and Tanner, D.G. (2000). Estimation of optimum plot dimensions and replication number for wheat experimentation in Ethiopia. African Crop Sci. Jour. 8 : 11-23.
Citation Format
How to Cite
Khan, M., Hasija, R. C., Aneja, D. R., & Sharma, M. K. (2016). A uniformity trial on Indian mustard for determination of optimum size and shape of blocks. Journal of Applied and Natural Science, 8(3), 1589–1593. https://doi.org/10.31018/jans.v8i3.1005
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Research Articles