Relative Efficiency of Incomplete Block Design in Sesame (Sesamum Indicum)
by
Ajay Kumar
Department of Maths & Stats, C.C.S.H.A.U., Hisar-125004 India
Coauthors: Kiran Kapoor (Assistant Scientist (Statistics), Department of Agricultural Economics, C.C.S.H.A.U., Hisar)

A uniformity trail on sesame was conducted at C.C.S.H.A.U., HISAR in 1999-2001 kharif season to assess the nature and magnitude of soil variability and consequently to determine the optimum size and shape of plots, efficiency of blocking, optimum number of replications. The co-efficient of variation decreased with increase in the plot size and this decrease was more rapid when plots were elongated in East-West direction. The long narrow plots when elongated in the East-West direction found to be more efficient than the rectangular and the square plots. Smith (1938) law describing the relationship between co-efficient of variation and plot size were found satisfactory. Optimum plot sizes comes out to be 5 units (5 sq.m.). In case of 4, 6, 8 and 12 plot blocks, but in case of without blocking the optimum size comes out to be 6 sq.m.. Blocks elongated in North-South direction were more effective in reducing error variation than those elongated in East-West direction.

Date received: July 7, 2001