Effects of Planting Patterns and NPK Fertilizer Rates on the Growth, Yield and Economic Performance of Sorghum (Sorghum bicolor L.) Varieties in the Sudan Savanna of Nigeria
DOI:
https://doi.org/10.70882/josrar.2026.v3i5.274Keywords:
Sorghum Varieties, Plant Density, NPK Fertilizer, Grain Yield, Sudan Savanna, Economic AnalysisAbstract
Sorghum (Sorghum bicolor L.) is a major cereal crop supporting food security and livelihoods in the Sudan Savanna of Nigeria. However, yields remain low due to inappropriate agronomic practices, declining soil fertility, and limited adoption of improved varieties. Field experiments were conducted during the 2023 rainy season at Dutsin-Ma (Katsina State) and Kazaure (Jigawa State), Nigeria, to evaluate the effects of planting pattern and NPK fertilizer rates on the growth, yield, and economic performance of sorghum varieties. Treatments consisted of three sorghum varieties (SAMSORG KSV 400, SAMSORG CSR 01, and a local KAURA variety), two planting patterns (single-row and double-row planting on ridges), and four NPK fertilizer rates (0, N30:P30:K30, N60:P30:K30, and N90:P30:K30) arranged in a factorial combination using a randomized complete block design with three replications. Growth parameters, yield components, grain yield, and economic returns were assessed. Results showed significant (p ≤ 0.05) effects of variety, planting pattern, and NPK rate on most measured parameters. SAMSORG KSV 400 produced the highest grain yield across locations, while double-row planting significantly outperformed single-row planting. Grain yield increased progressively with increasing NPK rates, with N90:P30:K30 producing the highest yield and gross margin. Significant interaction effects among variety, planting pattern, and fertilizer rate indicated the importance of integrated agronomic management. The combination of SAMSORG KSV 400, double-row planting, and N90:P30:K30 fertilizer emerged as the most productive and economically viable option for sorghum production in the Sudan Savanna. Adoption of these practices could substantially enhance sorghum productivity and farmer income in northern Nigeria. It is therefore recommendation that, SAMSORG KSV 400 verity, Double-row planting pattern on ridge with application of N90: P:30 K30 fertilizer, should be used in Sudan Savanna region due its higher productivity.
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