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V. D. Zheljazkov, Cerven, V., Cantrell, C. L., and M. Ebelhar, W., “Effect of N, location, and harvesting stage on peppermint productivity, oil content, and oil composition”, HortScience, vol. 44, pp. 1267-1270, 2009.
V. D. Zheljazkov and Nielsen, N. E., “Studies on the Effect of Heavy Metals (Cd, Pb, Cu, Mn, Zn and Fe) upon the Growth, Productivity and Quality of Lavender (Lavandula angustifolia Mill.) Production”, Journal of Essential Oil Research, vol. 8, no. 3, pp. 259 - 274, 1996.
V. D. Zheljazkov, Cantrell, C. L., Astatkie, T., and Jeliazkova, E. A., “Distillation Time Effect on Lavender Essential Oil Yield and Composition”, Journal of Oleo Science, vol. 62, no. 4, pp. 195 - 199, 2013.
V. D. Zheljazkov and Jeliazkova, E. A., “Uptake and distribution of Cd, Mn, Cu and Fe in three cultivars from Salvia sclarea L. grown on polluted soils”, Beitrage zur Zuchtungsforschung , no. 2, pp. 210-213, 1996.
V. D. Zheljazkov, Vick, B. A., Baldwin, B. S., Buehring, N., Astatkie, T., and Johnson, B., “Effect of Plant Date, Nitrogen Rate, and Hybrid on Sunflower”, Journal of Plant Nutrition, vol. 14, pp. 2198-2210, 2012.
V. D. Zheljazkov and Cantrell, C. L., “Productivity, content, and composition of the essential oil of three basil genotypes as a function of harvesting”, HORTSCIENCE, vol. 42, no. 4, 2007.
V. D. Zheljazkov, Cantrell, C. L., Evans, W. B., M. Ebelhar, W., and Coker, C., “Yield and composition of Ocimum basilicum L. and Ocimum sanctum L. grown at four locations”, HortScience, vol. 43, pp. 737-741, 2008.
V. D. Zheljazkov and Fair, P., “STUDY OF THE EFFECT OF HIGHLY HEAVY METAL POLLUTED SOILS ON METAL UPTAKE AND DISTRIBUTION IN PLANTS FROM GENERA ARTEMISIA, DRACCOCEPHALUM, INULA, RUTA, AND SYMPHYTUM”, Acta Horticulturae, no. 426, pp. 397 - 418, 1996.
V. D. Zheljazkov, Vick, B. A., Baldwin, B. S., Buehring, N., Astatkie, T., and Johnson, B., “EFFECT OF PLANTING DATE, NITROGEN RATE, AND HYBRID ON SUNFLOWER”, Journal of Plant Nutrition, vol. 35, no. 14, pp. 2198 - 2210, 2012.
V. D. Zheljazkov and Zhalnov, I., “Studies on the effect of different methods of weed control in Mentha piperita Huds. and Mentha arvensis L”, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 12-19, 1991.
V. D. Zheljazkov, Vick, B., M. Ebelhar, W., Buehring, N., and Astatkie, T., “Nitrogen applications modify seed and oil yields and fatty acid composition of winter mustard”, Industrial Crops and Products, vol. 36, pp. 28-32, 2012.
V. D. Zheljazkov, “Assessment of Wool Waste and Hair Waste as Soil Amendment and Nutrient Source”, Journal of Environment Quality, vol. 34, no. 6, p. 2310, 2005.
V. D. Zheljazkov, Astatkie, T., Zhalnov, I., and Georgieva, T. D., “Method for attaining rosemary essential oil with differential composition from dried or fresh material”, Journal of Oleo Science, vol. 64, no. 5, pp. 485 - 496, 2015.
V. D. Zheljazkov, Astatkie, T., Caldwell, C. D., MacLeod, J., and Grimmett, M., “Compost, manure, and gypsum application to timothy/red clover forage”, J. Environ. Qual., vol. 35, pp. 2410-2418, 2006.
V. D. Zheljazkov, Cantrell, C. L., Ebelhar, W., and Rowe, D., “Productivity, oil content, and oil composition of sweet basil as a function of nitrogen and sulphur fertilization”, Hort. Sci, vol. 43, no. 5, 2008.
V. D. Zheljazkov, Cantrell, C. L., and Astatkies, T., “Yield and Composition of Oil from Japanese Cornmint Fresh and Dry Material Harvested Successively”, Agronomy Journal, vol. 102, no. 6, p. 1652, 2010.
V. D. Zheljazkov, Astatkie, T., Shiwakoti, S., Poudyal, S., Horgan, T., Kovatcheva, N., and Dobreva, A., “Essential Oil Yield and Composition of Garden Sage as a Function of Different Steam Distillation Times”, HortScience, vol. 49, pp. 785-790, 2014.
V. D. Zheljazkov, Jones, A. M., Avula, B., Maddox, V., and Rowe, D., “Lignan and nutrient concentrations in American Mayapple (Podophyllum peltatum L.) in the Eastern United States”, HortScience, vol. 44, no. 2, 2009.
V. D. Zheljazkov, Cantrell, C. L., and Astatkie, T., “Yield and composition of Japanese cornmint fresh and dry material harvested successively ”, Agron J, vol. 102, pp. 1652-1656, 2010.
V. D. Zheljazkov, “Basil”, Plant Production, 1998.
V. D. Zheljazkov, Astatkie, T., and Jeliazkova, E. A., “Effect of foliar application of methyl jasmonate and extracts of juniper and sagebrush on essential oil yield and composition of ‘Native’ spearmint”, HortScience, vol. 48, no. 4, 2013.
V. D. Zheljazkov and Nielsen, N. E., “Studies on the effect of heavy metals (Cd, Pb, Cu, Mn, Zn, and Fe) upon the growth, productivity and quality of lavender (Lavandula angustifolia Mill.) production”, J. Essent. Oil Res., vol. 8, pp. 259-274, 1996.
V. D. Zheljazkov and Jekov, D., “Heavy metal content in some essential oils and plant extracts.”, Acta Hort. , vol. 426, pp. 427-433, 1996.
V. D. Zheljazkov, Astatkie, T., and Jeliazkova, E. A., “Effect of foliar application of methyl jasmonate and extracts of juniper and sagebrush on essential oil yield and composition of Native spearmint”, HortScience, vol. 48, pp. 462-465, 2013.
V. D. Zheljazkov, Craker, L. E., Xing, B., Nielsen, N. E., and Wilcox, A., “Aromatic plant production on metal contaminated soils”, Science of The Total Environment, vol. 395, no. 2-3, pp. 51 - 62, 2008.

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