Response of Potato (Solanum tuberosum L.) to NPSB Fertilizer Rate and Inter Row Spacing at Buno Bedele Zone

Alemayehu Abdeta, Tolasa Tamiru — Tue, 07 Oct 2025 00:00:00 +0700

Potato is a key tuber crop in Ethiopia, contributing significantly to food security and rural livelihoods. However, its productivity remains low due to factors such as improper fertilizer application and unsuitable inter-row spacing. This study was conducted during the 2022–2023 cropping season to evaluate the effects of NPSB fertilizer rates and inter-row spacing on potato yield and yield components. Four NPSB levels (50, 100, 150, and 200 kg ha⁻¹) and three inter-row spacings (65, 75, and 85 cm) were tested, along with a control, using a 4 × 3 factorial arrangement in a randomized complete block design with three replications. Analysis of variance revealed significant effects of both NPSB rate and spacing on all measured parameters, though their interaction was not significant. The highest marketable tuber yield (51.36 t ha⁻¹) was obtained with 200 kg ha⁻¹ NPSB, while the widest spacing (85 cm) produced 45.16 t ha⁻¹. Agronomic efficiency was greatest (152.4 kg kg⁻¹) at the lowest NPSB rate (50 kg ha⁻¹). Marketable tuber yield showed strong positive correlations with total tuber yield (r = 0.99***), average tuber weight (r = 0.92***), and large tuber size (r = 0.92***). Partial budget analysis indicated the highest net benefits of 1,231,355 birr ha⁻¹ (3823.92% MRR) for NPSB and 2,120,240 birr ha⁻¹ (11,444.83% MRR) for 85 cm spacing. Therefore, applying 150 kg ha⁻¹ NPSB fertilizer with 85 cm inter-row spacing is the most productive and economically viable practice for potato cultivation in the study area.

Effect of Fuel Management Information Systems (FMIS) on the Operational Performance of Government Vehicles in Tanzania

Mwinyi Mohamed, Angela-Aida K. Runyoro — Tue, 21 Oct 2025 00:00:00 +0700

The study examines the effects of Fuel Management Information Systems (FMIS) on the operational performance of government vehicles in Tanzania, focusing on digital tracking, fuel monitoring, and digital reporting. Conducted at the Ministry of Minerals headquarters in Dodoma, it adopted a pragmatism philosophy, a mixed-methods approach, and a cross-sectional design. A sample of 62 respondents, including drivers, transport officers, IT staff, procurement staff, and departmental heads, was selected through random and purposive sampling. Quantitative analysis employed multiple regression techniques. Findings revealed that digital tracking had a positive and significant effect on operational performance (β=0.387, p=0.000), which increased with individual moderators but became insignificant when combined. Fuel monitoring showed a strong positive and significant effect (β=0.595, p=0.000), remaining significant after individual moderation but turning negative under combined moderators (β=-0.225, p=0.020). Digital reporting had a positive but insignificant effect (β=0.016, p=0.795), which remained insignificant after individual moderation but became significantly negative under combined moderators (β=-0.896, p=0.024). The study recommends institutionalizing GPS-based tracking in all government vehicles, conducting training for drivers and fleet managers, and establishing robust data governance policies to secure information and enhance trust in FMIS usage.

International Journal Papier Advance and Scientific Review

Response of Potato (Solanum tuberosum L.) to NPSB Fertilizer Rate and Inter Row Spacing at Buno Bedele Zone

Effect of Fuel Management Information Systems (FMIS) on the Operational Performance of Government Vehicles in Tanzania