Volume 12, Issue 25, January - June 2026

Effects of organic amendment on growth and yield of onion (Allium cepa l.) in Bauchi State, Nigeria

Shuaibu Yunusa Muhammad^1♦, Bala Rashida Abdulmumini², Ukuru Sunday³

¹Department of Crop Production, Faculty of Agriculture and Agricultural Technology, Abubakar Tafawa Balewa University, Bauchi, Bauchi State, Nigeria.
²Department of Crop Production, Faculty of Agriculture and Agricultural Technology, Abubakar Tafawa Balewa University, Bauchi, Bauchi State, Nigeria.
³Department of Crop Production, Faculty of Agriculture and Agricultural Technology, Abubakar Tafawa Balewa University, Bauchi, Bauchi State, Nigeria.

^♦Corresponding author
Yunusa Muhammad Shuaibu, Department of Crop Production, Faculty of Agriculture and Agricultural Technology, Abubakar Tafawa Balewa University, PMB 0248 Bauchi, Bauchi State, Nigeria

ABSTRACT

The research was conducted at Teaching and Research Farm of Abubakar Tafawa Balewa University, Bauchi, Nigeria during dry season of 2025 to determine the effects of various organic fertilizers on the performance of onions (Allium cepa L.). The treatments consisted of Poultry Manure, Cow Dung, Rice Husk, cowpea husk, Poultry Manure + cowpea husk, Poultry Manure + Cow Dung, Cow Dung + Rice Husk, Cow Dung + cowpea husk, and a control. These were arranged in a randomized complete block design (RCBD) replicated three times. Data on plant height, leaf number, plant diameter, bulb diameter, yield per plot, and yield per hectare were collected. Analysis of variance (ANOVA) and Duncan’s Multiple Range Test (DMRT) were adopted for data analysis and mean separation. The result shows a significant (P ≤ 0.05) effects of organic amendments on onion growth and yield parameters. The also revealed that, poultry manure application produced the tallest plants, highest number of leaves, thicker bulbs and higher yields (44.02 t/ha) than the other treatments and the control. Compost application improved plant girth, while integrated applications showed moderate benefits. This finding indicated that organic fertilizer, particularly poultry manure, improved the performance of onion and reduce dependence on synthetic fertilizers. Application of poultry manure as an effective, sustainable amendment for onion cultivation is recommended for the study area and similar agroecological conditions.

Keywords: Onion, Organic, Fertilizer, Growth, Yield

Discovery Agriculture, 2026, 12, e6da3196

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Published: 09 May 2026