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All Journal African Multidisciplinary Journal of Sciences and Artificial Intelligence Open Access DRIVERset Kwaghe International Journal of Sciences and Technology
Onwu, Clement Alex
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences

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Assessment of Bacterial Population and Some Physicochemical Properties of Compost in Wukari LGA, Taraba State, Nigeria Onwu, Clement Alex; Umar, Jamila Yakubu; Aliyu, Patricia James
African Multidisciplinary Journal of Sciences and Artificial Intelligence Vol 2 No 2 (2025): African Multidisciplinary Journal of Sciences and Artificial Intelligence
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/amjsai.v2i2.6350

Abstract

Field studies were conducted at the Teaching and Research Farm, Federal University Wukari, to evaluate the bacterial population and selected physicochemical properties of compost in Wukari, Taraba State, Nigeria. Eight compost treatments were tested: GCP (Gmelina leaf + cow dung + poultry droppings), SGCP (Sawdust + Gmelina leaf + cow dung + poultry droppings), RGCP (Rice husk + Gmelina leaf + cow dung + poultry droppings), MGCP (Maize stalks + Gmelina leaf + cow dung + poultry droppings), GCPU (Gmelina leaf + cow dung + poultry droppings + urea), SGCPU (Sawdust + Gmelina leaf + cow dung + poultry droppings + urea), RGCPU (Rice husk + Gmelina leaf + cow dung + poultry droppings + urea), and MGCPU (Maize stalks + Gmelina leaf + cow dung + poultry droppings + urea). Wood ash, water, and topsoil were added to all treatments. Compost pits (1 m³) were prepared for each treatment, replicated three times in a Randomized Complete Block Design (RCBD). Turning, bacterial enumeration, and temperature recordings were conducted monthly. Results revealed significant variation in bacterial populations, with MGCPU recording the highest counts. Compost temperatures remained below 40°C across all stages, indicating decomposition occurred predominantly within the mesophilic range. Total nitrogen (TN) content varied significantly, with RGCPU yielding the highest TN value. Available phosphorus was moderate across treatments, while potassium levels showed no significant difference. Overall, RGCPU and MGCPU outperformed other treatments in terms of microbial activity and nutrient content. Thus, RGCPU is recommended as the most suitable composting treatment for the study area.
Assessment of Bacterial Population and Some Physicochemical Properties of Compost in Wukari LGA, Taraba State, Nigeria Onwu, Clement Alex; Umar, Jamila Yakubu; Aliyu, Patricia James
African Multidisciplinary Journal of Sciences and Artificial Intelligence Vol 2 No 2 (2025): African Multidisciplinary Journal of Sciences and Artificial Intelligence
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/amjsai.v2i2.6350

Abstract

Field studies were conducted at the Teaching and Research Farm, Federal University Wukari, to evaluate the bacterial population and selected physicochemical properties of compost in Wukari, Taraba State, Nigeria. Eight compost treatments were tested: GCP (Gmelina leaf + cow dung + poultry droppings), SGCP (Sawdust + Gmelina leaf + cow dung + poultry droppings), RGCP (Rice husk + Gmelina leaf + cow dung + poultry droppings), MGCP (Maize stalks + Gmelina leaf + cow dung + poultry droppings), GCPU (Gmelina leaf + cow dung + poultry droppings + urea), SGCPU (Sawdust + Gmelina leaf + cow dung + poultry droppings + urea), RGCPU (Rice husk + Gmelina leaf + cow dung + poultry droppings + urea), and MGCPU (Maize stalks + Gmelina leaf + cow dung + poultry droppings + urea). Wood ash, water, and topsoil were added to all treatments. Compost pits (1 m³) were prepared for each treatment, replicated three times in a Randomized Complete Block Design (RCBD). Turning, bacterial enumeration, and temperature recordings were conducted monthly. Results revealed significant variation in bacterial populations, with MGCPU recording the highest counts. Compost temperatures remained below 40°C across all stages, indicating decomposition occurred predominantly within the mesophilic range. Total nitrogen (TN) content varied significantly, with RGCPU yielding the highest TN value. Available phosphorus was moderate across treatments, while potassium levels showed no significant difference. Overall, RGCPU and MGCPU outperformed other treatments in terms of microbial activity and nutrient content. Thus, RGCPU is recommended as the most suitable composting treatment for the study area.
Assessment of Cow Dung on Nutrient Uptake, Soil Physicochemical Properties, Growth and Yield of Okra in Jalingo, Taraba State, Nigeria Onwu, Clement Alex; Emmanuel, Danladi; Amadu, Lanki Dairus
Kwaghe International Journal of Sciences and Technology Vol 3 No 2 (2026): Kwaghe International Journal of Sciences and Technology
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/kijst.v3i2.10010

Abstract

Declining soil fertility remains a major constraint to sustainable agricultural production in the Guinea Savannah zone of Nigeria, necessitating the evaluation of organic amendments that can improve soil quality and crop productivity. This study evaluated the effects of cow dung application on nutrient uptake, soil physicochemical properties, growth, and yield of okra in Jalingo, Taraba State, Nigeria. A field experiment was conducted during the 2022 cropping season using a randomized complete block design with three replications. Five treatments were applied: control at 0 t ha⁻¹ and cow dung at 15, 20, 25, and 30 t ha⁻¹. Okra leaves were sampled for nutrient uptake at 50% flowering, while soil samples were collected at a depth of 0–30 cm before planting and after harvest for the analysis of particle size distribution, pH, organic carbon, total nitrogen, available phosphorus, exchangeable bases, and cation exchange capacity. The findings showed that cow dung significantly enhanced nutrient uptake, with the 30 t ha⁻¹ treatment recording the highest values for nitrogen, phosphorus, and potassium uptake. Soil analysis further indicated that higher cow dung rates, particularly 25–30 t ha⁻¹, significantly improved soil pH, organic carbon, available phosphorus, exchangeable bases, and cation exchange capacity compared with the control treatment. Significant differences were also observed in plant height, pod length, pod width, and pod weight across cow dung application rates. The highest pod yield of 8.65 t ha⁻¹ was recorded under the 30 t ha⁻¹ treatment, which was statistically similar to the 25 t ha⁻¹ treatment, with 8.28 t ha⁻¹. The study concludes that cow dung application at 25–30 t ha⁻¹ is more effective in improving soil fertility, nutrient uptake, okra growth, and yield under the conditions of the study area. These findings contribute to sustainable soil fertility management by supporting the use of cow dung as an organic amendment for enhancing okra production in the Guinea Savannah zone of Nigeria.
Co-Authors Aliyu, Patricia James Amadu, Lanki Dairus Emmanuel, Danladi Umar, Jamila Yakubu