Experimental Design Analysis on the Efficiency of Grain Yields of Cowpea Varieties in the three Senatorial Zones of Osun State, Nigeria

Autor: Adeleke Mariam O, Olawuwo Simeon, Ojo Thompson O, Ogunleye Timothy
Rok vydání: 2014
Předmět:
Zdroj: IOSR Journal of Mathematics. 9:52-60
ISSN: 2278-5728
2319-765X
DOI: 10.9790/5728-0965260
Popis: This paper, which is based on the experiment conducted by Ministry of Agriculture and Food Security, State Government of Osun within 2012 planting season, investigates the best variety of cowpea in each of the three senatorial zones of Osun State with a view to recommending variety of cowpea that will produce optimum yields. Four common varieties of cowpea: IAR341, IT8D994, IAR1696 and LOCAL were considered in the experiment with one farmland each selected from individual zone as block. Randomized Complete Block Design (RCBD) with the assumption of random effect model was used in collecting the data sets on grain yields of cowpea varieties. Observations were taken from Iwo, Ila and Esa-Oke Farmlands representing Osun West, Osun Central and Osun East Senatorial Zones. Bartlett's statistic was used to test for the validity of homogeneity of error variances for the data sets obtained from each zone. The test revealed that the assumption of equality of error variances was not violated. Shapiro-Wilk test was employed to check for validity of normality assumption on the data sets in each zone and, it was confirmed that departure from normality was not established. While the two assumptions were valid, ANOVA was conducted on the data sets and it was concluded that the mean grain yields of cowpea varieties are significantly different in the three zones. Duncan Multiple Range Test (DMRT) was employed to perform pair-wise comparisons of the varieties of cowpea. Box Plots were drawn for cowpeas varieties in each zone with a view to recommending the best variety for planting. It was established that LOCAL will perform best and produce optimum grain yield while IAR1696 will give the least yields in Osun West Senatorial Zone. We also discovered that IAR1696 produced maximum grain yields in both Osun East and Central Senatorial Zones for which LOCAL and IT8D994 produced the least yields in the two zones respectively.
Databáze: OpenAIRE
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