Response of Difference Rates of Cow Dung on the Growth and Yield of Onion (Allium cepa L.) Grown in Dadin-Kowa

Organic fertilizer is one of the factors that can affect the growth and yield of onion. This research aimed to determine the response of different rate of cow dung on the growth and yield of onion. The experiment was conducted in November 2020 to February 2021 at Federal College of Horticulture Research Farm, Dadin-Kowa Gombe State. Experiments using a Randomized Complete Block Design (RCBD) with a single factor, it was use of Cow dung manure at different rate in Four (4) treatment (0ton/ha, 5ton/ha, 10ton/ha and 15ton/ha) which was replicated three (3) time, with a total of 12 plots. The data collected was subjected to statistical analyses of variance (ANOVA) using Genstat, the means were separated using least significant difference (LSD) at 5% level of probability. The results showed that the application of cow dung significantly affected the growth and yield of onion. Of a given type of treatments, the 15ton/ha produced the highest (59.17cm) in plant height and was highly significant, in all the parameter that was observed, e.g Neck thickness (5.83 cm), Bulb diameter (33.30 mm), Bulb length(45.8mm) Bulb weight (64.8kg) biomass weight (62.0 g) and Bulb yield/ha (107.9kg) these were significant, therefore farmer in the study area are advised to adopt the 15 ton/ha for the high growth and yield of onion production.