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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 and Topalov, V., . Studies on the effect of harvesting stages and the methods of weed control on the removal of nutrient elements through Mentha rhizomes from nursery plantings, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 43-48, 1991.
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.
A. Gawde, Cantrell, C. L., Zheljazkov, V. D., Astatkie, T., and Schlegel, V., Steam distillation extraction kinetics regression models to predict essential oil yield, composition, and bioactivity of chamomile oil , Industrial Crops and Products, vol. 58, pp. 61-67, 2014.
A. Gawde, Cantrell, C. L., Zheljazkov, V. D., Astatkie, T., and Schlegel, V., Steam distillation extraction kinetics regression models to predict essential oil yield, composition, and bioactivity of chamomile oil, Industrial Crops and Products, vol. 58, pp. 61 - 67, 2014.
V. D. Zheljazkov and Warman, P. R., Source-separated municipal solid waste compost application to swiss chard and basil. Heavy metals in the environment, 2003.
V. D. Zheljazkov and Warman, P. R., Source-Separated Municipal Solid Waste Compost Application to Swiss Chard and Basil, Journal of Environment Quality, vol. 33, no. 2, p. 542, 2004.
V. D. Zheljazkov and Warman, P. R., Source Separated Municipal Solid Waste Compost Application to Swiss Chard and Basil, J. Environ. Qual, vol. 33, pp. 542-552, 2004.
V. D. Zheljazkov, Some elements of Sustainable Agriculture and their application in the United Kingdom agriculture. A review. , Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 39, pp. 255-261, 1994.
K. J. Parsons, Zheljazkov, V. D., MacLeod, J., and Caldwell, C. D., Soil and Tissue Phosphorus, Potassium, Calcium, and Sulfur as Affected by Dairy Manure Application in a No-Till Corn, Wheat, and Soybean Rotation, Agronomy Journal, vol. 99, no. 5, p. 1306, 2007.
K. J. Parsons, Zheljazkov, V. D., MacLeod, J., and Caldwell, C. D., Soil and tissue P, K, Ca and S as affected by dairy manure application in a no-till corn, wheat, and soybean rotation, Agron J., vol. 99, pp. 1306-1316, 2007.
V. D. Zheljazkov and Terziisky, D., Scanning electron microscopy investigation on the spermoderma of grown in Bulgaria cultivars from genus Salvia, Lavandula, and Ocimum, Acta Hort. , vol. 426, pp. 473-482, 1996.
V. D. Zheljazkov and Terziisky, D., SCANNING ELECTRON MICROSCOPY INVESTIGATION ON THE SPERMODERMA OF GROWN IN BULGARIA CULTIVARS FROM GENUS SALVIA, LAVANDULA, AND OCIMUM, Acta Horticulturae, no. 426, pp. 473 - 482, 1996.

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