Conservation Tillage of Sweetpotato

Jett, Lewis W.; Talbot, T.

doi:10.21273/hortsci.32.4.605f

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“…Additionally, sweetpotatoes grown in undisturbed rye residue had significantly greater leaf area, vine weight, root set, and yield relative to conventionally tilled sweetpotatoes. The positive yield response in reduced tillage systems observed by Jett and Talbot (1998) as well as in this study may be attributed to improved soil moisture retention due to cover crop residue during the first 4 wk of root development.…”

Section: Cumulative Weed Densitysupporting

confidence: 68%

“…Reduced tillage systems modify soil moisture and temperature regimes and thus may influence tuber initiation. In Louisiana, several cover crop species were examined for use in reduced-tillage sweetpotato production ( Jett and Talbot 1998). Mixtures of hairy vetch and rye, hairy vetch and wheat, and ryegrass were most effective in suppressing weeds without a reduction in yield.…”

Section: Cumulative Weed Densitymentioning

confidence: 99%

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Cover Crop Management Affects Weeds and Yield in Organically Managed Sweetpotato Systems

et al. 2007

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A 3-yr field experiment was initiated in 2001 to evaluate weed suppression and sweetpotato productivity in three organic sweetpotato production systems. Organic systems were (1) compost and no cover crop with tillage (Org-NC), (2) compost and a cover crop mixture of hairy vetch and rye incorporated before transplanting (Org-CI), and (3) compost and the same cover crop mixture with reduced tillage (Org-RT). A conventional system with tillage and chemical controls (Conv) was included for comparison. Suppression of monocot and dicot weed density and biomass was similar between Org-NC and Org-CI each year, and were frequently similar to Conv. Org-RT was as effective as Org-NC in controlling dicot weed density and biomass each year, but did not suppress monocot weeds. At sweetpotato harvest, an increase in cover crop surface residue biomass in Org-RT was associated with a decrease in cumulative total weed density (R2= 0.43, P = 0.0001); however, the amount of that residue was insufficient to suppress late-emerging monocot weeds. Total sweetpotato yield in Org-RT was at least 45% lower than other systems in 2002 and was most likely due to an increase in monocot weed density and biomass concurrent with a decrease in sweetpotato vine biomass. Total sweetpotato yield was similar among all systems in 2001 and 2004; the exception was lowest yields obtained in the Org-RT system in 2002. Organically managed sweetpotato with or without an incorporated cover crop produced sweetpotato yields equal to conventionally managed systems despite difficulties controlling weeds that emerged later in the season.

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Section: Cumulative Weed Densitysupporting

confidence: 68%

Section: Cumulative Weed Densitymentioning

confidence: 99%