OPTIMUM PLOT SIZE AND NUMBER OF REPLICATIONS IN FABA BEAN

Document Type : Original research

10.12816/ejpb.2022.244074

Abstract

Planning agricultural experiments and assessing their accuracy are important in determining the credibility of the results obtained from the research. Therefore, the objective of the present investigation was to estimate the optimum plot size and number of replications. Two field experiments were carried out during the two successive seasons of 2018/19 and 2019/20 at the Agricultural Research and Experiment Station, Faculty of Agriculture, Cairo University, Giza, Egypt. The genetic materials used in this experiment included two faba bean cultivars (CV). Estimates of coefficient of variation (C.V.%) varied between 5.9% to 35.9% for Cairo 25 and Cairo 4 cultivars under Orbanche-free condition. In general, the highest estimates of coefficient of variation were detected for Cairo 25 variety under Orbanche-free condition. Standard error decreased as the number of replications and plot size increased. In the context, the rate of decrease was more obvious due to increase in number of replications than that due to increasing plot size until the plot size was increased to 6 basic units (14.4 m2).

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