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The effect of harvest date on the yield and composition of Tasmanian dill oil ( Anethum graveolens L.)
Author(s) -
Clark Robert J.,
Menary Robert C.
Publication year - 1984
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740351108
Subject(s) - anethum graveolens , carvone , herb , crop , hectare , limonene , essential oil , yield (engineering) , horticulture , biology , botany , agronomy , medicinal herbs , traditional medicine , agriculture , medicine , physics , ecology , thermodynamics
Semi‐commercial plots of dill ( Anethum graveolens L.) were established in the Derwent Valley area of Tasmania during 1981 and 1982. The 1981 crop was irrigated and yielded 43 to 104 kg ha −1 of dill herb oil (less than 35% carvone) or 57 to 73 kg of dill seed oil ha −1 , depending on harvest date. The non‐irrigated crop established in 1982 yielded 41 to 77 kg of dill herb oil. The carvone content of oil from the 1982 crop failed to reach a level of 35%, the minimum considered characteristic of dill seed oil. These results indicate that Tasmania is well suited to the production of either dill herb or seed oil and that higher yields of oil and carvone are obtained per hectare from the herb crop. Major components of Tasmanian dill oil were carvone (9.6 to 46.5%), α‐phellandrene (15.5 to 49.1%), β‐phellandrene (5.2 to 7.6%), limonene (16.5 to 22.3%) and dimethylhexahydrobenzofuran (0.4 to 11.9%).