Effect of Tillage Systems and Vine Orientation on Yield of Sweet Potato (<i>Ipomoea batatas</i> L.)

摘要: In Zimbabwe sweet potato (Ipomoea batatas L.) production is practiced under different tillage systems with varying vine orientations, which contribute to variable yields. Limited research on yield loss due these practices available despite that the majority of farmers are growing potatoes sustain their livelihoods. A field study was carried out at Midlands State University in 2013/14 rainy season, determine effect and orientation potato. 2 × 3 factorial treatment structure a randomized complete block design (RCBD), three replications used. Tillage had two factors (ridge mound) orientations were used (horizontal, fold loop). Data storage root length, diameter weight subjected Analysis Variance (ANOVA) 5% significance level. There no interaction (p < 0.05) between diameter, length yield. The horizontal gave statistically significant roots width 405 mm. Conversely loop least (316 mm) diameter. Horizontal significantly wider than orientation. ridge recorded longer (134.2 mean while those from mounds shorter (115.9 length. highest (35.5 t/ha 34.8 respectively) On other hand, obtained lowest (28.7 t/ha) concluded widest lengths. recommended if high yields be achieved.