Influence of ridge height, vine orientation and cuttings on growth and yield of sweet potato (Ipomoea Batatas L.) in Dutse, Sudan Savanna zone of Nigeria

Abstract

A field study was conducted in Dutse, Sudan Savannah of Nigeria during the 2023 and 2024 rainy seasons to evaluate the effects of ridge height, vine orientation, and vine cuttings on growth and yield of sweet potato. The experiment consisted of five ridge heights (0, 30, 40, 50, and 60 cm), three vine orientations (45°, 90°, and 180°), and three vine cuttings (apical, middle, and base). Results showed that 60 cm ridge height and apical vine cuttings significantly improved growth and yield. Apical vine cuttings outperformed middle and base cuttings in vine length, number of leaves, leaf area, and root yield. Vine orientation had no significant effect on growth and yield. The interaction between ridge height and vine cutting showed 30 cm ridge and apex had higher chlorophyll content, while 50 cm ridge and apex had higher root fresh weight. The study recommends using 60 cm ridge height, apical vine cuttings, and 45° or 90° planting orientation for improved sweet potato yield.

Keywords: Ridge Height, Vine Cutting, Vine Orientation