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Advances in Research, ISSN: 2348-0394,Vol.: 9, Issue.: 3


Study on Optimum Block Size and Shape in Uniformity Trial of Sunflower (Helianthus annuus)


Nishu Lohmor1, Mujahid Khan1*, Kiran Kapoor1 and Nitin Tanwar1

1Department of Mathematics, Statistics and Physics, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana,125004, India.


Article Information
(1) Prabhakar Tamboli, Director International Training Program, Department of Environmental Science & Technology, University of Maryland, USA.
(2) Martin Kröger, Professor, Computational Polymer Physics Swiss Federal Institute of Technology (ETH Zürich), Switzerland.
(3) Francisco Marquez-Linares, Full Professor of Chemistry, Nanomaterials Research Group, School of Science and Technology, University of Turabo, USA.
(1) Bilal ahmad lone, Sher-e-Kashmir University of Agricultural Sciences and Technology, India.
(2) Roger Kogge Enang, University of Dschang, Cameroon.
(3) Ismail Demir, Ahi Evran University, Turkey.
(4) Hamza Abdulmajeed, University of Ibadan, Ibadan, Nigeria.
Complete Peer review History: http://www.sciencedomain.org/review-history/18669




A uniformity trial for the determination of optimum size and shape of blocks was conducted at CCS Haryana Agricultural University research farm, Hisar, Haryana from February 2014 to June 2014 on sunflower hybrid 66A507 Pioneer, on a field of size 35 m × 40 m, which reduced to 32 m × 36 m after eliminating border effects. The crops of each basic unit (1 m × 1 m) were separately harvested and the contiguous plots grouped into blocks of 4, 8, 12 and 16 plots. The blocks elongated in the N-S direction were more effective in reducing error variation than those elongated in the E-W direction. The coefficient of variation decreased from 14.88 to 7.30 with increase in block size from 4 to 16 for plot size 1 m2, thus larger blocks were found to be more efficient (R2 = 0.963 for 16-plot blocks) than smaller ones. The 16 size block was found to be more efficient with block shape of 16 m × 1 m, which should be recommended for further researches on sunflower crop in the particular area. In general, blocking arrangements were found to be more efficient than those without blocking.


Keywords :

Blocks; coefficient of variation; efficient; optimum block size and shape; sunflower; uniformity trial.


Full Article - PDF    Page 1-8    Article Metrics


DOI : 10.9734/AIR/2017/31573

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