Application of mixture experiment in optimizing Cabbage (Brassica Oleracea L.) yield using varied organic manure sources, in Turbo – Uasin Gishu County, Kenya
Keywords:
Best organic manure, Optimum yield, Regression model, Simplex-Lattice Design, Working conditionAbstract
The basis for this research was to determine the optimum yield performance of Cabbage as influenced by four varied types of manures: Chicken, Pig, Goat and used Tealeaves. The primary goal was to develop the best organic fertilizer or mixture proportion that would maximize crop yield. Utilizing right quantities of manure would ultimately lead to small-scale farmers having optimal yields and hence fetching increased profits. The {4,4} Simplex-Lattice Design was employed considering either the single-component or combination of two manure at a time at different proportions. The final average weight of the crop was analyzed using R Software. Second-Order regression models were plotted with intercepts set to zero. The model aided plotting of the contour plot. This is essential in establishing recommended proportions of manure in their pure or binary blends that offer optimal operating conditions. Different combinations of manures adding to unity were tested. Results were comparably different because selected manures had different nutrient components in them. The study concluded that Pig manure was the best single component that yielded maximally with an average weight of 2.93 and 2.86 Kg in the overall model and reduced model, respectively. For the binary blends, a combination of Chicken and Pig manure gave highest output, 1.16 Kg, with 0.6 and 0.7 working conditions, respectively. These findings are recommended for adoption by farmers to boost yields. This would increase income and ultimately help in eradicating poverty, which is a menace to the economic growth of our country.
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