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V. D. Zheljazkov, Cantrell, C. L., Astatkie, T., and Hristov, A. N., “Yield, content, and composition of peppermint and spearmints as a function of harvesting time and drying”, J. Agric. Food Chem. , vol. 58, pp. 11400-11407, 2010.
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 Topalov, V., “Effect of Planting Time and Density of Yields from Rooted Mint Cuttings”, J. Herbs Spices & Medicinal Plants, vol. 4, pp. 15-24, 1996.
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 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, Avula, B., Jones, A. M., Maddox, V., and Rowe, D., “Lignan and nutrient concentrations in American Mayapple (Podophyllum peltatum L.) in the Eastern United States”, HortScience, vol. 44, pp. 349-353, 2009.
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 and Nikolov, S., “Accumulation of Cd, Pb, Cu, Mn, and Zn by Sylibum marianum L. grown on polluted soils”, Acta Hort. , vol. 426, pp. 297-308, 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, “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, “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, Craker, L. E., Xing, B., Nielsen, N. E., and Wilcox, A., “Aromatic plant production on metal contaminated soils”, Sci. Total Environ., vol. 395, pp. 51-62, 2008.
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 and Zhalnov, I., “Study on the impact of different means for weed control in Mentha piperita Huds. and Mentha arvensis L.”, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 36, pp. 51-57, 1991.
V. D. Zheljazkov, Astatkie, T., and Schlegel, V., “Effects of distillation time on Pinus Ponderosa essential oil Yield, composition, and antioxidant activity”, HortScience, vol. 47, pp. 785-789, 2012.
V. D. Zheljazkov, Cantrell, C. L., and Astatkie, T., “Variation in Podophyllotoxin Concentration in Leaves and Rhizomes of American mayapple (Podophyllum peltatum L.)”, vol. 33, pp. 633-637, 2011.
V. D. Zheljazkov, Yankuloff, Y., Raev, R. Tsevtkov, Stanev, S., Margina, A., and Kovatcheva, N., “Achievements in breeding on medicinal and aromatic plants in Bulgaria”, in Proceedings of the International Symposium: Breeding Research in Aromatic and Medicinal Plants, 1996.
V. D. Zheljazkov, Astatkie, T., and Schlegel, V., “Distillation time changes oregano essential oil yields and composition but not the antioxidant or antimicrobial activities”, HortScience, vol. 47, no. 6, 2012.
V. D. Zheljazkov and Warman, P. R., “Phytoavailability and Fractionation of Cu, Mn, and Zn in soil following application of two composts to four crops”, Environ. Pollut., vol. 13, pp. 187-195, 2004.
V. D. Zheljazkov, Astatkie, T., Jeliazkova, E. A., Heidel, B., and Ciampa, L., “Essential oil content, composition and bio activity of juniper species in Wyoming, United States”, Natural Product Communications, vol. 12, pp. 201-204, 2017.
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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