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V. D. Zheljazkov, Cantrell, C. L., Tekwani, B., and Khan, S. I., Content, Composition, and Bioactivity of the Essential Oils of Three Basil Genotypes as a Function of Harvesting, Journal of Agricultural and Food Chemistry, vol. 56, no. 2, pp. 380 - 385, 2008.
V. D. Zheljazkov, Cantrell, C. L., Tekwani, B., and Khan, S., Content, composition, and bio activity of the essential oil of three basil genotypes as a function of harvesting, J. Agric. Food Chem. , vol. 56, pp. 380-385, 2008.
Y. Jankuloff and Zheljazkov, V. D., Conditions for improving the biosynthesis of atropine and scopolamine in plants, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 243-247, 1995.
V. D. Zheljazkov, Cantrell, C. L., and Astatkie, T., Concentration in Leaves and Rhizomes of American mayapple (Podophyllum peltatum L.), Industrial Crops and Products, vol. 33, pp. 633-637, 2011.
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, Astatkie, T., Caldwell, C. D., MacLeod, J., and Grimmett, M., Compost, Manure, and Gypsum Application to Timothy/Red Clover Forage, Journal of Environment Quality, vol. 35, no. 6, p. 2410, 2006.
I. Zhalnov and Zheljazkov, V. D., Competitive intraspecific relations on Sorghum halepense (L.) Pers. , Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 37, pp. 113-118, 1992.
V. D. Zheljazkov, Yankov, B., and Topalov, V., Comparison of three methods of mint propagation and their effect on the yield of fresh material and essential oil, J. Essent. Oil Res., vol. 8, pp. 35-45, 1996.
V. D. Zheljazkov, Yankov, B., and Topalov, V., Comparison of Three Methods of Mint Propagation and Their Effect, 1994.
V. D. Zheljazkov, Yankov, B., and Topalov, V., Comparison of Three Methods of Mint Propagation and Their Effect on the Yield of Fresh Material and Essential Oil, Journal of Essential Oil Research, vol. 8, no. 1, pp. 35 - 45, 1996.
V. D. Zheljazkov and Warman, P. R., Comparison of three digestion methods for the recovery of 17 plant essential nutrients and trace elements from six composts, Compost Sci. and Util., vol. 10, pp. 197-203, 2002.
V. D. Zheljazkov and Warman, P. R., Comparison of Three Digestion Methods For the Recovery of 17 Plant Essential Nutrients And Trace Elements from Six Composts, Compost Science & Utilization, vol. 10, no. 3, pp. 197 - 203, 2002.
M. Munroe, Zheljazkov, V. D., Astatkie, T., and Stratton, G., Comparison of lead extraction and detection procedures for six Canadian Soils, Communications in Soil Science and Plant Analysis, vol. 43, pp. 2303-2313, 2012.
M. Munroe, Zheljazkov, V. D., Astatkie, T., and Stratton, G., Comparison of Lead Extraction and Detection Procedures for Six Canadian Soils, Communications in Soil Science and Plant Analysis, vol. 43, no. 17, pp. 2303 - 2313, 2012.
V. D. Zheljazkov and McNeil, P., Comparison of five digestion procedures for recovery of nutrients and trace elements in plant tissue, J. Plant Nutr., vol. 31, pp. 1937-1946, 2008.
V. D. Zheljazkov and McNeil, P., Comparison of Five Digestion Procedures for Recovery of Nutrients and Trace Elements in Plant Tissue, Journal of Plant Nutrition, vol. 31, no. 11, pp. 1937 - 1946, 2008.
H. Y. Sintim, Zheljazkov, V. D., Foley, M. E., and Evangelista, R. L., Coal-Bed Methane Water: Effects on Soil Properties and Camelina Productivity, Journal of Environmental Quality, vol. 46, pp. 641-648, 2017.
S. Poudyal, Zheljazkov, V. D., Cantrell, C. L., and Kelleners, T., Coal-Bed Methane Water Effects on Dill and Its Essential Oils, Journal of Environment Quality, vol. 45, no. 2, p. 728, 2016.
S. Poudyal, Zheljazkov, V. D., Cantrell, C. L., and Kelleners, T., Coal-bed methane water effects on dill and its essential oil, Journal of Environmental Quality, vol. 45, pp. 728-733, 2016.
V. D. Zheljazkov, Topalov, V., Yankov, B., Terziev, J., and Dimitrov, I., Changes in the quality of Mentha rhizome as depending on the time of overground mass harvesting and the method of weed control, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 37, pp. 239-247, 1992.
A. K. Obour, Chen, C., Sintim, H. Y., Mcvay, K., Lamb, P., Obeng, E., Mohammed, Y. A., Khan, Q., Afshar, R. K., and Zheljazkov, V. D., Camelina sativa as a fallow replacement crop in wheat-based crop production systems in the US Great Plains, Industrial Crops and Products, vol. 111, pp. 22–29, 2018.

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