Browsing by Author "Douglas, James A."
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Effect of environment and time of planting on the production and quality of yacon (Smallanthus sonchifolius) storage roots
Douglas, James A.; Follett, John M.; Douglas, M.H.; Deo, B.; Scheffer, J.J.C.; Littler, Ray A.; Manley-Harris, Merilyn (Taylor & Francis, 2007)The tuberous root yields of yacon (Smallanthus sonchifolius) were compared from field trials planted in September, October, and November at four sites (Pukekohe, Hamilton, Lincoln, Mosgiel) across New Zealand. The September ... -
Seasonal variation of biomass and bioactive alkaloid content of goldenseal, Hydrastis canadensis
Douglas, James A.; Follett, John M.; Parmenter, Graeme A.; Sansom, Catherine E.; Perry, Nigel B.; Littler, Ray A. (Elsevier, 2010)Seasonal variations in biomass and alkaloid contents of goldenseal (Hydrastis canadensis) were investigated. Five-year-old plants gave 5× the yield of roots and rhizomes of two-year-old plants, and summer growth gave ...
Co-authors for James A. Douglas
James A. Douglas has 9 co-authors in Research Commons.