In Refereed Journals

181. Andaregie, A., and T. Astatkie (2020), Determinants of technical efficiency of potato farmers and effects of constraints on potato production in Northern Ethiopia. Experimental Agriculture. In press. 

180. Andaregie, A., A. Worku, and T. Astatkie (2020), Analysis of Economic Efficiency in charcoal production in Northwest Ethiopia: A Cobb-Douglas Production Frontier Approach. Trees, Forests and People. 2: 100020. https://doi.org/10.1016/j.tfp.2020.100020

179. Chen, J., W.P.D.W. Thilakarathna, T. Astatkie, and H.P.V. Rupasinghe (2020), Optimization of catechins and proanthocyanidins recovery using microwave-assisted digestion of grape seeds. Biomolecules. 10: 243.  

178. Hannah, W., T. Astatkie, and B. Rathgeber (2020), Hatch rate of laying hen strains provided a photoperiod during incubation. Animal. 14(2): 353-359.  

177. Heshmat, K., B. Asgari Lajayer, M.R. Shakiba, and T. Astatkie (2020), Assessment of physiological traits of Common bean cultivars in response to water stress and Molybdenum levels. Journal of Plant Nutrition. In press. 

176. Ibrahim, M.A., C.L. Cantrell, E.A. Jeliazkova, T. Astatkie, and V.D. Zheljazkov (2020), Utilization of nutmeg (Myristica fragrans Houtt.) seed hydrodistillation time to produce essential oil fractions with varied compositions and pharmacological effects. Molecules. 25: 565. 

175. Markos, S., B. Belay, T. Dessie, and T. Astatkie (2020), Morphometric Characterization of Local and Exotic Chicken Genotypes in Three Agro-Ecologies of Northern Ethiopia. Journal of Animal and Plant Sciences. In press. 

174. Martynenko, A., T. Astatkie, and T. Defraeye (2020), The role of convection in electrohydrodynamic (EHD) drying. Journal of Food Engineering. 271: 109777. 

173. Moghadam, N.K., B. Motesharezadeh, R.M. Amiri, B. Asgari Lajayer, and T. Astatkie (2020), The effect of potassium and zinc under salinity stress on physiology and chlorophyll fluorescence in two cultivars of canola. Arabian Journal of Geosciences. 13: 771. https://doi.org/10.1007/s12517-020-05776-y

 172. Negu, A., A. Zegeye, and T. Astatkie (2020), Development and Quality Evaluation of Wheat Based Cookies Enriched with Fenugreek and Oat Flours. Journal of Food Science and Technology. 57: 3573–3580.  

171. Neme, K., Y.B. Tola, A. Mohammed, E. Tadesse, and T. Astatkie (2020), Effects of Variety, Storage Container and Duration on the Physical Properties, Oil Content, Germination Capacity and Seed Loss due to Plodia interpunctella of Ethiopian Sesame. Journal of the Science of Food and Agriculture. In press. https://doi.org/10.1002/jsfa.10691

170. Sany, H., B.M. Alharbi, K.A. Almutairi, H.A.H. Said-Al Ahl, R.P. Mauro, and T. Astatkie (2020), Effects of NaCl on growth, essential oil and chemical composition of Plectranthus amboinicus. Plant Archives. 20(S1): 2471-2477. 

169. Semerdjieva, I., V.D. Zheljazkov, C.L. Cantrell, T. Astatkie, and A. Ali (2020), Essential oil yield and composition of the Balkan endemic Satureja pilosa Velen. (Lamiaceae). Molecules.  25(4): 827. 

168. Shiwakoti, S., V.D. Zheljazkov, H.T. Gollany, M. Kleber, B. Xing, and T. Astatkie (2020), Macronutrient in soils and wheat from long-term agroexperiments reflects variations in residue and fertilizer inputs. Scientific Reports. 10(1): 3263. 

167. Teka, T.A., N. Retta, G. Bultosa, H. Admassu, and T. Astatkie (2020), Protein fractions, in vitro protein digestibility and amino acid composition of select cowpea varieties grown in Ethiopia. Food Bioscience. 36: 100634.  

166. Yang, J., Q. He, H. Niu, T. Astatkie, K. Corscadden, and R. Shi (2020), Statistical clarification of hydrothermal co-liquefaction effect and investigation on the influence of process variables on co-liquefaction effect. Industrial & Engineering Chemistry Research. 59(7): 2839-2848. 

165. Zheljazkov, V.D., S. Vladimir, I.B. Semerdjieva, M. Kačániová, T. Astatkie, and I. Dincheva (2020), Grinding and Fractionation During Distillation Alter Hemp Essential Oil Profile and its Antimicrobial Activity. Molecules. 25, 3943.  

164. Alharbi, B.M., A.A. Mahmoud, T. Astatkie, and H.A.H. Said-Al Ahl (2019), Growth and essential oil composition responses of parsley cultivars to phosphorus fertilization and harvest date. Journal of Plant Nutrition. 42(18): 2395-2405.

163. Asfaw, E., A. Nebiyu, E. Bekele, M. Ahmed, and T. Astatkie (2019), Coffee husk biochar application increased AMF root colonization, P uptake, N2 fixation and yield of soybean [Glycine max (L.) Merrill] grown in a tropical nitisol, southwest Ethiopia. Journal of Plant Nutrition and Soil Science. 181: 419-428.

162. Hegazy, M.H., A.S. Sabra, B.M. Alharbi, H.A.H. Said-Al Ahl, T. Astatkie, D. Grulova, and T.M. Abdelrazik (2019), Ameliorative effects of supplemental nutrition on growth and essential oil yield of saline irrigated Satureja montana. Journal of Essential Oil Bearing Plants. 22(5): 1218-1227.

161. Mulatu, A., A. Zewde, and T. Astatkie (2019), Productivity of Nationally Released Tomato Varieties in Southern Ethiopia. Crop Research. 54: 147-151.

160. Said-Al Ahla, H.A.H, A.S. Sabra, A. Alataway, T. Astatkie, A.A. Mahmoud, and E. Bloem (2019), Biomass production and essential oil composition of Thymus vulgaris in response to water stress and harvest time. Journal of Essential Oil Research. 31(1): 63-68.

159. Semerdjieva, I., M. Burducea, T. Astatkie, V.D. Zheljazkov, and I. Dincheva (2019), Essential Oil Composition of Ruta graveolens L. and Hyssopus officinalis subsp. aristatus (Godr.) Nyman as a Function of Hydrodistillation Time. Molecules. 24, 4047.

158. Semerdjieva, I., S. Shiwakoti, C.L. Cantrell, V.D. Zheljazkov, T. Astatkie, V. Schlegel, and T. Radoukova (2019), Hydrodistillation extraction kinetics regression models for essential oil yield and composition in Juniperus virginiana, J. excelsa, and J. Sabina. Molecules. 24, 986.

157. Semerdjieva, I., V.D. Zheljazkov, T. Radoukova, D. Radanović, T. Marković, I. Dincheva, A. Stoyanova, T. Astatkie, and M. Kačániová (2019), Essential Oil Yield, Composition, and Bioactivity of Juniperus oxycedrus L. from Eastern Europe. Biochemical Systematics and Ecology. 84: 55-63.

156. Shiwakoti, S., V.D. Zheljazkov, H.T. Gollany, M. Kleber, B. Xing, and T. Astatkie (2019), Micronutrients in the Soil and Wheat: Impact of 84 Years of Organic or Synthetic Fertilization and Crop Residue Management. Agronomy. 9, 464; doi.org/10.3390/agronomy9080464.

155. Teffera, Z.L., J. Li, T. Astatkie, and Z.M. Gebru (2019), Effects of irrigation systems on physicochemical properties of soil at different depths: a case study at a farm near Ziway Lake, Ethiopia. Irrigation and Drainage. 68: 165-175.

154. Yang, J., Q. He, K. Corscadden, H. Niu, Jianan Lin, and T. Astatkie (2019), Advanced models for the prediction of product yield in hydrothermal liquefaction via a mixture design of biomass model components coupled with process variables. Applied Energy. 233-234: 906-915.

153. Zheljazkov, V.D., T. Astatkie, Norton, U., and E. Jeliazkova (2019), Gypsum and Coal-bed Methane Water Modify Soil Properties, Lemongrass and Palmarosa Productivity, Nutrient Uptake, and Essential Oil Profile. Agronomy. 9, 282.

152. Dessalew, G., A. Beyene, A. Nebiyu, and T. Astatkie (2018), Effect of brewery spent diatomite sludge on trace metal availability in soil and uptake by wheat crop, and trace metal risk on human health through the consumption of wheat grain. Heliyon. 4(9):e00783.

151. Duston, J., J. Manriquez-Hernandez, G.M. MacInnis, C.M. Reesor, and T. Astatkie (2018), Striped Bass early life history in the macrotidal Shubenacadie River. Transactions of the American Fisheries Society. 147: 919–938.

150. Jeliazkova, E., V.D. Zheljazkov, M. Kačániova, T. Astatkie, and B.L. Tekwani (2018), Sequential elution of essential oil constituents during steam distillation of hops (Humulus lupulus L.) and influence on oil yield and antimicrobial activity. Journal of Oleo Science. 67(7): 871-883.

149. Mahmoud, A.A., A.S. Gendy, H.A.H. Said-Al Ahl, D. Grulova, T. Astatkie, and T.M. Abdelrazik (2018), Impacts of harvest time and water stress on the growth and essential oil components of horehound (Marrubium vulgare). Scientia Horticulturae. 232: 139-144.

148. Mohamed, H.F.Y., A.A. Mahmoud, A. Alatawi, M.H. Hegazy, T. Astatkie, and H.A.H. Said-Al Ahl (2018), Growth and essential oil responses of Nepeta species to potassium humate and harvest time. Acta Physiologiae Plantarum. 40:204.

147. Radoukova, T., V.D. Zheljazkov, I. Semerdjieva, I. Dincheva, A. Stoyanova, M. Kačániová, T. Marković, D. Radanović, T. Astatkie, and I. Salamon (2018), Differences in Essential Oil Yield, Composition, and Bioactivity of Three Juniper Species from Eastern Europe. Industrial Crops and Products. 124: 643-652.

146. Sabra A.S, T. Astatkie, A. Alataway, A.A. Mahmoud, A.S.H. Gendy, H.A.H. Said-Al Ahl, and K.G. Tkachenko (2018), Response of biomass development, essential oil and composition of Plectranthus amboinicus to irrigation frequency and harvest time. Chemistry and Biodiversity. 15, e1800005.

145. Said-Al Ahl, H.A.H., A.S. Sabra, A.S.H. Gendy, and T. Astatkie (2018), Essential oil content and concentration of constituents of Lemon Balm (Melissa officinalis L.) at different harvest dates. Journal of Essential Oil Bearing Plants. 21(5): 1410-1417.

144. Seifu, M., Y.B. Tola, A. Mohammed, and T. Astatkie (2018), Effect of variety and drying temperature on physicochemical quality, functional property, and sensory acceptability of dried onion powder. Journal of Food Science & Nutrition. 6: 1641–1649.

143. Yang, J., Q. He, H. Niu, K. Corscadden, and T. Astatkie (2018), Hydrothermal Liquefaction of Biomass Model Components for Product Yield Prediction and Reaction Pathways Exploration. Applied Energy. 228: 1618-1628.

142. Zewde, A., A. Mulatu, and T. Astatkie (2018), Inorganic and Organic Liquid Fertilizer Effects on Growth and Yield of Onion. International Journal of Vegetable Science. 24: 567-573.

141. Zheljazkov, V.D., N. Stewart Jr., B. Joyce, H. Baxter, C.L. Cantrell, T. Astatkie, E. Jeliazkova, and C.R. Poovaiah (2018), Dual utilization of medicinal and aromatic crops: for plant chemicals and biofuels. Journal of Agricultural and Food Chemistry. 66 (33): 8744–8752. DOI: 10.1021/acs.jafc.7b04594.

140. Zheljazkov, V.D., M. Kačániova, I. Dincheva, T. Radoukova, I.B. Semerdjieva, T. Astatkie, and V. Schlegel (2018), Essential oil composition, antioxidant and antimicrobial activity of the galbuli of six juniper species. Industrial Crops and Products. 124: 449-458.

139. Hailegiorgis, H., G. Bultosa, T. Abera, and T. Astatkie (2017), Nutritional and Sensory Quality of Wheat Bread Supplemented with Cassava and Soybean Flours. Cogent Food & Agriculture. 3: 1331892.

138. Maqbool, R., D. Percival, Q. Zaman, T. Astatkie, S. Adl, and D. Buszard (2017), Leaf Nutrients Ranges and Berry Yield Optimization in Response to Soil-applied Nitrogen, Phosphorus and Potassium in Wild Blueberry (Vaccinium angustifolium Ait.). European Journal of Horticultural Science. 82(4): 166-179.

137. Markos, S., B. Belay, and T. Astatkie (2017), Evaluation of egg quality traits of three indigenous to Ethiopia chicken ecotypes kept under farmers’ management conditions. International Journal of Poultry Science. 16(5): 180-188.

136. Martynenko, A., T. Astatkie, N. Riaud, P. Wells, and T. Kudra (2017), Driving forces for mass transfer in electrohydrodynamic (EHD) drying. Innovative Food Science and Emerging Technologies. 43: 18-25.

135. Sangha, J.S., T. Astatkie, and G.C. Cutler (2017), Effects of plant essential oils on diamond back moth, Plutella xylostella (Lepidoptera: Plutellidae), survival and behavior. The Canadian Entomologist. In Press.

134. Zheljazkov, V.D., I.B. Semerdjieva, I. Dincheva, M. Kacaniova, T. Astatkie, T. Radoukova, and V. Schlege (2017), Determination of antimicrobial and antioxidant activity of Juniper galbuli essential oil constituents eluted at different times. Industrial Crops and Products. 109: 529-537.

133. Zheljazkov, V.D., T. Astatkie, E.A. Jeliazkova, B. Heidel, and L. Ciampa (2017), Essential Oil Content, Composition and Bioactivity of Juniper Species in Wyoming, United States. Natural Product Communications. 12(2): 201-204. 

132. Abdelrazik, T.M., A.S. Sabra, T. Astatkie, M.H. Hegazy, D. Grulova, H.A.H. Said-Al Ahl (2016), The effect of iron and urea on the growth and essential oil content of Plectranthus amboinicus. International Journal of Pharmacy and Pharmaceutical Sciences. 8(8): 223-231.

131. Cutler, G.C., T. Astatkie, G.S. Chahil (2016), Weed seed granivory by carabid beetles and crickets for biological control of weeds in commercial lowbush blueberry fields. Agricultural and Forest Entomology. 18:390-397.

130. Maqbool, R., D. Percival, Q. Zaman, T. Astatkie, S. Adl, and D. Buszard (2016), Improved Growth and Harvestable Yield through Optimization of Fertilizer Rates of Soil-applied

Nitrogen, Phosphorus, and Potassium in Wild Blueberry (Vaccinium angustifolium Ait.). HortScience. 51(9):1092-1097.

129. Martynenko, A., K. Shotton, T. Astatkie, G. Petrash, C. Fowler, W. Neily, and A.T. Critchley (2016), Thermal imaging of soybean response to drought stress: the effect of Ascophyllum. SpringlerPlus. 5: 1393.

128. Shiwakoti, S., S. Poudyal, O. Saleh, T. Astatkie, and V.D. Zheljazkov (2016), Method for attaining caraway seed oil fractions with different composition. Chemistry and Biodiversity. 13: 695-699.

127. Yang, J., T. Astatkie, and Q.S. He, (2016), A comparative study on the effect of unsaturation degree of camelina and canola oils on the optimization of bio-diesel production. Energy Reports. 2: 211-217.

126. Zheljazkov, V.D., S. Shiwakoti, E.A. Jeliazkova, and T. Astatkie (2016), Chemical Profile and Bioactivity of Essential Oil Fractions as a Function of Distillation Time. Medicinal and Aromatic Crops: Production, Phytochemistry, and Utilization, American Chemical Society, Chapter 10, pp 145–166.

125. Bufalo, J., C.L. Cantrell, T. Astatkie, V.D. Zheljazkov, A. Gawde, and C.S. Fernandes Boaro (2015), Organic versus conventional fertilization effects on sweet basil (Ocimum basilicum L.) growth in a greenhouse system. Industrial Crops and Products. 74: 249-254.

124. Bufalo, J., V.D. Zheljazkov, C.L. Cantrell, T. Astatkie, L. Ciampa, and E. Jeliazkova (2015), Diurnal effects on spearmint oil yields and composition. Scientia Horticulturae. 182: 73-76.

123. Burkhardt, A., H. Sintim, A. Gawde, C.L. Cantrell, T. Astatkie, V.D. Zheljazkov, and V. Schlegel (2015), Method for attaining fennel (Foeniculum vulgare Mill.) seed oil fractions with different composition and antioxidant capacity. Journal of Applied Research on Medicinal and Aromatic Plants. 2(3): 87-91.

122. Gebretsadikan, T.M., G. Bultosa, S.F. Forsido, and T. Astatkie (2015), Nutritional quality and acceptability of sweet potato-soybean-moringa composite porridge. Nutrition and Food Science. 45(6): 845-858.

121. Joyce, B.L., V.D. Zheljazkov, R. Sykes, C.L. Cantrell, C. Hamilton, D.G. Mann, M. Rodriguez, J. Mielenz, T. Astatkie, and C.N. Stewart, Jr. (2015), Ethanol and high-value terpene co-production from lignocellulosic biomass of Cymbopogon flexuosus and Cymbopogon martinii. PLOS ONE. 10(10): e0139195.

120. Martynenko, A., T. Astatkie, and V. Satanina (2015), Novel Hydrothermodynamic Food Processing Technology. Journal of Food Engineering. 152: 8-16.

119. Price, G.W., T. Astatkie, J.D. Gillis, and K. Liu (2015), Long-term influences on nitrogen dynamics and pH in an acidic sandy soil after single and multi-year applications of alkaline treated biosolids. Agriculture, Ecosystems & Environment. 208:1-11.

118. Shiwakoti, S., H.Y. Sintim, S. Poudyal, J. Bufalo, C.L. Cantrell, T. Astatkie, E. Jeliazkova, L. Ciampa, and V.D. Zheljazkov (2015), Diurnal effects on Mentha canadensis oil concentration and composition at two different harvests. HortScience. 50: 85-89.

117. Sintim, H.Y., A. Burkhardt, A. Gawde, C.L. Cantrell, T. Astatkie, A.E. Obour, V.D. Zheljazkov, and V. Schlegel (2015), Hydrodistillation time affects dill seed essential oil yield, composition, and bioactivity.  Industrial Crops and Products. 63: 190-196.

116. Worku, M., and T. Astatkie (2015), Effects of row spacing on productivity and nodulation of two soybean varieties under hot sub-moist tropical conditions in south-western Ethiopia. Journal of Agriculture and Rural Development in the Tropics and Subtropics. 116(2): 99-106.

115. Zheljazkov, V.D., A. Gawde, C.L. Cantrell, T. Astatkie, and V. Schlegel (2015), Distillation Time as Tool for Improved Antimalarial Activity and Differential Oil Composition of Cumin Seed Oil. PLOS ONE. 10(12): e0144120.

114. Zheljazkov, V.D., S. Shiwakoti, T. Astatkie, I. Salamon, D. Grulova, S. Mudrencekova, and V. Schlegel (2015), Yield, composition, and antioxidant capacity of ground cumin seed oil fractions obtained at different time points during the hydrodistillation. HortScience. 50(8): 1213-1217.

113. Zheljazkov, V.D., T. Astatkie, I. Zhalnov, and T. Georgieva (2015), Method for Attaining Rosemary Essential Oil with Differential Composition from Dried and Fresh Material. Journal of Oleo Science. 64(5): 485-496.

112. Boudreau, L., B. Benkel, T. Astatkie, and K. Rouvinen-Watt (2014), Ideal body condition improves reproductive performance and influences genetic health in female mink. Animal Reproduction Science. 145: 86-98.

111. Cantrell, C., V.D. Zheljazkov, C. Carvalho, T. Astatkie, E. Jeliazkova, and L. Rosa (2014), Dual extraction of essential oil and podophyllotoxin from creeping juniper (Juniperus horizontalis).  PLOS ONE. 9(9): e106057.

110. Gawde, A., C. L. Cantrell, V.D. Zheljazkov, T. Astatkie, and V. Schlegel (2014), Steam distillation extraction kinetics regression models to predict essential oil yield, composition, and bioactivity of chamomile oil. Industrial Crops and Products. 58: 61-67.

109. Moser, B. R., V. D. Zheljazkov, E. L. Bakota, R. L. Evangelista, A. Gawde, C. L. Cantrell, J. K. Winkler-Moser, A. N. Hristov, T. Astatkie, and E. Jeliazkova (2014), Method for obtaining three products with different properties from fennel (Foeniculum vulgare) seed. Industrial Crops and Products. 60: 335-342.

108. Rouvinen-Watt, K., C. Pal, T. Martin, L. Harris, T. Astatkie, D. Kryzskaya, V. Kärjä, A. Mustonen, R. Tammi, M. Tammi, and P. Nieminen (2014), Evidence of endoplasmic reticulum stress and liver inflammation in the American mink Neovison vison with benign hepatic steatosis. Journal of Comparative Physiology B. 184: 913-927.

107. Satanina, V., W. Kalt, T. Astatkie, P. Havard, and A. Martynenko (2014), Comparison of Anthocyanin Concentration in Blueberries Processed Using Hydrothermodynamic and Conventional Technologies. Journal of Food Process Engineering. 37: 609-618.

106. Zheljazkov, V.D., T. Astatkie, and V. Schlegel (2014), Hydrodistillation extraction time effect on essential oil yields, composition, and bioactivity of Coriander oil.   Journal of Oleo Science. 63: 857-865.​

105. Zheljazkov, V.D., T. Astatkie, and E. Jeliazkova (2014), Drying and shade effects on 'Native' spearmint oil yields and composition. HortScience. 49: 306-310.

104. Zheljazkov, V.D., T. Astatkie, S. Shiwakoti, S. Poudyal, T. Horgan, N. Kovatcheva, and A. Dobreva (2014), Essential oil yield and composition of garden sage as a function of different steam distillation times. HortScience. 49: 785-790. 

103. Astatkie, T. (2013), Design and analysis of experiments for post-harvest management and value addition studies with applications to essential oils. Ethiopian Journal of Applied Science and Technology. Special Issue No. 1: 67-79.

102. Cannon, J.B., C. Cantrell, T. Astatkie, and V.D. Zheljazkov (2013), Modification of yield and composition of essential oils by distillation time. Industrial Crops and Products. 41: 214-220.

101. Cantrell, C.L., V.D. Zheljazkov, W.A. Osbrink, A. Castro-Ruiz, V. Maddox, L.E. Craker, and T. Astatkie (2013), Podophyllotoxin and essential oil profile of Juniperus and related species. Industrial Crops and Products. 43: 668-676.

100. Forsido, S.F., H.P.V. Rupasinghe, and T. Astatkie (2013), Antioxidant capacity, total phenolics and nutritional content in selected Ethiopian staple food ingredients. International Journal of Food Science & Nutrition. 64: 915-920.

99. Fredeen, A.H., Juurlink, S, M. Main, T. Astatkie, and R.C. Martin (2013), Implications of dairy systems on enteric methane and postulated effects on total greenhouse gas emission. Animal. 7: 1875-1883.

98. Zheljazkov, V.D., T. Astatkie, B. O’Brocky, and E. Jeliazkova (2013), Essential oil composition and yield of Anise from different distillation times. HortScience. 48: 1393-1396.

97. Zheljazkov, V.D., T. Astatkie, T. Horgan, V. Schlegel, and X. Simonnet (2013), Distillation time effect on essential oil yield, composition, and antioxidant capacity of Sweet Sagewort (Artemisia annua L.) oil. HortScience. 48: 1288-1292.

96. Zheljazkov, V.D., C.L. Cantrell, T. Astatkie, V. Schlegel, E. Jeliazkova, and D. Lowe (2013), The effect of coal-bed methane water on Spearmint and Peppermint. Journal of Environmental Quality. 42: 1815-1821.

95. Zheljazkov, V.D., T. Astatkie, and E.A. Jeliazkova (2013), Effect of foliar application of Methyl Jasmonate and extracts of Juniper and Sagebrush on essential oil yield and composition of ‘Native’ Spearmint. HortScience. 48: 462-465.

94. Zheljazkov, V.D., T. Astatkie, and E. Jeliazkova (2013), Year-round variations in essential oil content and composition of male and female juniper. HortScience. 48: 883-886.

93. Zheljazkov, V.D., T. Astatkie, E.A. Jeliazkova, A.O. Tatman, and V. Schlegel (2013), Distillation time alters essential oil yield, composition, and antioxidant activity of female Juniperus scopulorum trees. The Journal of Essential Oil Research. 25: 62-69.

92. Zheljazkov, V.D., C. Cantrell, T. Astatkie, and E.A. Jeliazkova (2013), Distillation time effect on lavender essential oil yield and composition. Journal of Oleo Science. 62: 195-199.

91. Zheljazkov, V.D., C. Cantrell, T. Astatkie, and E.A. Jeliazkova (2013), Mentha canadensis L., a subtropical plant, can withstand first few fall frosts when grown in northern climate. Industrial Crops and Products. 49: 521-525.

90. Zheljazkov, V.D., C. Cantrell, M.A. Donega, and T. Astatkie (2013), Bioprospecting for podophyllotoxin in the Big Horn Mountains, Wyoming. Industrial Crops and Products. 43: 787-790.

89. Zheljazkov, V.D., T. Horgan, T. Astatkie, and V. Schlegel (2013), Distillation time modifies essential oil yield, composition, and antioxidant capacity of Fennel (Foeniculum vulgare Mill). Journal of Oleo Science. 62: 665-672.

88. Zheljazkov, V.D., B.A. Vick, M.W. Ebelhar, N. Buehring, and T. Astatkie (2013), Effect of N on yield and chemical profile of winter canola in Mississippi. Journal of Oleo Science. 62: 453-458.

87. Duston, J. and T. Astatkie (2012), Prey density and nonvisual feeding by larval striped bass. Transactions of the American Fisheries Society. 141: 610-614.

86. Jeliazkova, E. A., C. Balbalian, T. Astatkie and P. Collins (2012),   Evaluating natural products for control of black spot disease on roses. Journal of Medicinally Active Plants. 1: 13-18.

85. Liu, K., T. Q. Zhang, C. S. Tan, T. Astatkie and G.W. Price (2012), Crop and soil nitrogen responses to phosphorus and potassium fertilization and drip irrigation under processing tomato. Nutrient Cycling in Agroecosystems. 93: 151-162.
 
84. Munroe, M. D., V. D. Zheljazkov, T. Astatkie and G. W. Stratton (2012), Comparison of lead extraction and detection procedures for six Canadian soils. Communications in Soil Science and Plant Analysis. 43: 2303-2313.

83. Zheljazkov, V. D., C. Cantrell, T. Astatkie, and E. Jeliazkova (2012), Fall frost effects on the essential oil of “Native” spearmint (Mentha spicata L.) in Wyoming. HortScience. 47: 1603-1606.

82. Zheljazkov, V. D., C. Cantrell, M. A. Donega, and T. Astatkie (2012), Podophyllotoxin concentration in Junipers in the Big Horn Mountains in Wyoming. HortScience. 47: 1696-1697.

81. Zheljazkov, V. D., B. A. Vick, B. S. Baldwin, N. Buehring, T. Astatkie, and B. Johnson (2012), Effect of Planting Date, Nitrogen Rate, and Hybrid on Sunflower. Journal of Plant Nutrition. 35: 2198-2210.

80. Zheljazkov, V. D., T. Astatkie, E. A. Jeliazkova and V. Schlegel (2012), Distillation time alters essential oil yield, composition, and antioxidant activity of male Juniperus scopulorum trees. Journal of Oleo Science. 61: 537-546.

79. Zheljazkov, V. D., T. Astatkie and V. Schlegel (2012), Distillation time changes Oregano essential oil yields and composition but not the antioxidant or antimicrobial activities. HortScience. 47: 777-784.

78. Zheljazkov, V. D. and T. Astatkie (2012), Effect of distillation time on Mentha canadensis essential oil yield and composition. HortScience. 47: 643-647.

77. Zheljazkov, V. D., and T. Astatkie (2012), Distillation waste water can modify peppermint (Mentha x piperita L.) oil composition. Industrial Crops and Products. 36: 420-426.

76. Zheljazkov, V. D., T. Astatkie, and V. Schlegel (2012), Effects of distillation time on the Pinus ponderosa essential oil yield, composition, and antioxidant activity.   HortScience. 47: 785-789.

75. Zheljazkov, V. D., T. Astatkie, and A. Hristov (2012), Lavender and hyssop productivity, oil content, and bioactivity as a function of harvest time and drying. Industrial Crops and Products. 36: 222-228.

74. Zheljazkov, V.D., B.A. Vick, M.W. Ebelhar, N. Buehring, and T. Astatkie (2012), Nitrogen applications modify seed and oil yields and fatty acid composition of winter mustard. Industrial Crops and Products. 36: 28-32.

73. Dobreva, A., N. Kovatcheva, V. D. Zheljazkov, and T. Astatkie (2011),   Improvement of essential oil yield of oil-bearing (Rosa damascena Mill.) due to surfactant and maceration. Industrial Crops and Products.  34: 1649-1651.

72. Duston, J., T. Astatkie, and C. Zhang (2011), Hypo-osmoregulatory capacity during smolting of endangered Inner Bay of Fundy Atlantic salmon and other eastern Canadian stocks. Aquaculture. 319: 221-225.

71. Kovatcheva, N., V. D. Zheljazkov, and T. Astatkie (2011), Productivity, Oil Content, Composition, and Bioactivity of Oil-bearing Rose Accessions. HortScience. 46(5): 710-714.

70. Liu, K., T. Zhang, C. S. Tan, and T. Astatkie (2011), Responses of Fruit Yield and Quality of Processing Tomato to Drip-Irrigation and Fertilizers Phosphorus and Potassium. Agronomy Journal. 103: 1339-1345. 

69. Worku, M., and T. Astatkie (2011), Row and plant spacing effects on yield and yield Components of soya bean varieties under hot humid tropical environment of Ethiopia. Journal of Agronomy and Crop Science. 197: 67-74.

68. Zheljazkov, V. D., and T. Astatkie (2011), Effect of residual distillation water of 15 plants and three plant hormones on Scotch Spearmint (Mentha x gracilis Sole). Industrial Crops and Products. 33: 704-709.

67. Zheljazkov, V. D., and T. Astatkie (2011), Effect of distillation waste water and plant hormones on Spearmint growth and composition. Journal of the science of food and agriculture.  91: 1135-1141.

66. Zheljazkov, V. D., and T. Astatkie (2011), Effect of plant species and benomyl on lead concentration and removal from lead-enriched soil. HortScience. 46(12): 1604-1607.

65. Zheljazkov, V. D., C. L. Cantrell, and T. Astatkie (2011), Variation in podophyllotoxin concentration in leaves and rhizomes of American mayapple (Podophyllum peltatum L.).  Industrial Crops and Products. 33: 633-637.

64. Zheljazkov, V. D., C. L. Cantrell, T. Astatkie, and J. B. Cannon (2011), Lemongrass Productivity, Oil Content, and Composition as a Function of Nitrogen, Sulfur and Harvest Time. Agronomy Journal. 103(3): 805-812.

63. Zheljazkov, V. D., T. Horgan, T. Astatkie, D. Fratesi, and C.C. Mischke (2011), Study on shrimp waste water and vermicompost as a nutrient source for bell peppers. HortScience. 46(11): 1493-1496.

62. Zheljazkov, V. D., B. A. Vick, B. S. Baldwin, N. Buehring, C. Coker, T. Astatkie, and B. Johnson (2011), Oil productivity and composition of sunflower as a function of hybrid and planting date. Industrial Crops and Products. 33: 537-543.

61. Belew, D., T. Astatkie, M. N. Mokashi, Y. Getachew and C. P. Patil (2010), Effects of salinity and mycorrhizal inoculation (Glomus fasciculatum) on growth responses of grape rootstocks (Vitis spp). South African Journal of Enology and Viticulture. 31(2): 82-88.

60. Liu, K. A. M. Hammermeister, M. H. Entz, T. Astatkie, P. R. Warman and R. C. Martin (2010), Nitrogen availability in an organic potato crop following 3-year transition under contrasting farming systems. Journal of Sustainable Agriculture. 34: 821-835.  

59. Miller, J. C., T. Astatkie and A. Madani (2010), Soil test phosphorus recovery from livestock manures compared with inorganic fertilizer in soil Incubations. Applied and Environmental Soil Science. Article ID 425613, 6 pages.  

58. Wang-Pruski, G., R. H. Coffin, R. D. Peters, K. I. Al-Mughrabi, H. W. Platt, D. Pinto, S. Veenhuis-MacNeill, W. Hardy, S. Lim and T. Astatkie (2010), Phosphorous acid for late blight suppression in potato leaves. Americas Journal of Plant Science and Biotechnology. 4(2): 25-29.

57. Worku, M. and T. Astatkie (2010), Growth responses of arabica coffee (Coffea arabica L.) varieties to soil moisture deficit at the seedling stage at Jimma, Southwest Ethiopia. Journal of Food, Agriculture & Environment. 8(1): 195-200.

56. Worku, M. and T. Astatkie (2010), Dry matter partitioning and physiological responses of Coffea arabica varieties to soil moisture deficit stress at the seedling stage in southwest Ethiopia. African Journal of Agricultural Research. 5(15): 2066-2072.

55. Zheljazkov, V. D., T. Astatkie, T. Horgan and S. M. Rogers (2010), Effect of plant hormones and distillation water on mints. HortScience. 45(9): 1338-1340.

54. Zheljazkov, V.D., C. L. Cantrell, and T. Astatkie (2010), Study on Japanese cornmint in Mississippi. Agronomy Journal. 102(2): 696-702.

53. Zheljazkov, V. D., C. L. Cantrell, and T. Astatkie (2010), Yield and composition of oil from Japanese Cornmint fresh and dry material harvested successively. Agronomy Journal. 102(6): 1652-1656.

52. Zheljazkov, V. D., C. L. Cantrell, T. Astatkie and A. Hristov (2010), Yield, content and composition of peppermint and spearmints as a function of harvesting time and drying. Journal of Agricultural and Food Chemistry. 58: 11400-11407.

51. Zheljazkov, V.D., C. Cantrell, T. Astatkie, and W. Ebelhar (2010), Peppermint productivity and oil composition as a function of nitrogen, growth stage, and harvest time. Agronomy Journal. 102(1): 124-128.

50. Zheljazkov, V.D, C. Cantrell, T. Astatkie, and W. Ebelhar (2010), Productivity, oil content and composition of two spearmint species in Mississippi. Agronomy Journal. 102(1): 129-133.

49. Cutler, C.G., K. Ramanaidu, T. Astatkie and M.B. Isman (2009), Green peach aphid, Myzus persicae (Hemiptera: Aphididae), reproduction during exposure to sublethal concentrations of imidacloprid and azadirachtin. Pest Management Science. 65(2): 205-209.

48. Rupasinghe, H.P.V., L. Wang, N.L. Pitts and T. Astatkie (2009), Baking and sensory characteristics of muffins incorporated with apple skin powder. Journal of Food Quality. 32: 685-694.

47. Sibley, K. J., T. Astatkie, G. Brewster, P. C. Struik, J. F. Adsett, and K. Pruski (2009), Field-scale validation of an automated soil nitrate measurement system. Precision Agriculture. 10: 162-174.

46.  Zheljazkov, V. D.,  B. A. Vick, B. S. Baldwin, N. Buehring, T. Astatkie and B. Johnson (2009), Oil Content and Saturated Fatty Acids in Sunflower as a Function of Planting Date, Nitrogen rate, and Hybrid. Agronomy Journal. 101: 1003-1011.

45. Beavers, R. L., A. M. Hammermeister, B. Frick, T. Astatkie and R. C. Martin (2008), Spring wheat yield response to variable seeding rates in organic farming systems at different fertility regimes. Canadian Journal of Plant Science. 88: 43-52.

44. Wang, B., B. M. Rathgeber, T. Astatkie, and J. L. MacIsaac (2008), The stress and fear levels of microwave toe-treated broiler chickens grown with two photoperiod programs. Poultry Science 87(7). 1248-1252.

43. Zheljazkov, V.D., B. Vick, W. Ebelhar, N. Buehring, B. Baldwin, T. Astatkie, and J. Miller (2008), Yield, oil content and composition of sunflower grown at multiple locations in Mississippi. Agronomy Journal. 100(3): 635-642.

42. Astatkie, T., M. N. Rifai, P. Havard, J. Adsett, M. Lacko-Bartošová, and P. Otepka (2007), Efficiency and performance of hot water, infrared and flame weeder thermal units to control weeds. Biological Agriculture and Horticulture. 25: 1-12.

41. Duston, J., T. Astatkie and S.B. Murray (2007), Effect of salinity at constant 10 oC on grow-out of anadromous Arctic charr from Labrador. Aquaculture. 273: 679-686.

40. Astatkie, T. (2006), Absolute and relative measures for evaluating the forecasting performance of time series models for daily streamflows, Nordic Hydrology. 37: 205-215.

39. Astatkie, T., A . A. Joseph and R. C. Martin (2006), A two-level unreplicated factorial design to determine the effect of organic and inorganic fertilizers on dry mater yield of permanent pasture. Renewable Agriculture and Food Systems. 21: 106-113.

38. Hammermeister, A. M. , T. Astatkie, E. A. Jeliazkova, P. R. Warman and R. Martin (2006), Nutrient supply from organic amendments applied to unvegetated soil, lettuce and orchard grass. Canadian Journal of Soil Science. 86: 21-33.

37. Pruski, K., R. K. Prange, B. J. Daniels-Lake, J. Nowak, T. Astatkie, and D. H. Ronis (2006), Growth-room and field studies with seed tubers treated with Ethylene and 1-methylcyclopropene (MCP) during storage, American Journal of Potato Research. 83: 149-160.

36. Rajasekaran, L. R., T. Astatkie, and C. Caldwell (2006), Seeding rate and seed spacing modulate root yield and recovery of slicer and dicer carrots differently, Scientia Horticulturae. 107: 319-324.

35. Zheljazkov, V. D., T. Astatkie, C. D. Caldwell, J. MacLeod, and M. Grimmett (2006), Compost, manure, and gypsum application to timothy/red clover forage.  Journal of Environmental Quality. 35: 2410-2418.

34. Duston, J., T. Astatkie, and P.F. MacIsaac (2005), Genetic influence of parr versus anadromous sires on the life histories of Atlantic salmon (Salmo salar). Canadian Journal of Fisheries and Aquatic Sciences. 62: 2067-2075.

33. Elmi, A.A., T. Astatkie, C. Madramootoo, R. Gordon and D. Burton (2005), Assessment of denitrification gaseous end-products in the soil profile using repeated measures analysis, Journal of Environmental Quality. 34: 446-454.

32. Martin, R. C., T. Astatkie, J. Cooper and A. H. Fredeen (2005), A comparison of methods used to determine biomass on naturalized swards. Journal of Agronomy and Crop Science. 191: 152-160.

31. Pruski, K., T. Astatkie, and J. Nowak (2005), Tissue culture propagation of Mongolian Cherry (P. runus fruticosa L.) and Nanking Cherry (P. tomentosa L.), Plant Cell, Tissue and Organ Culturer. 82: 207-211.

30. Duston, J., T. Astatkie and P.F. MacIsaac (2004), Effect of body size on growth and food conversion of juvenile striped bass reared at 16 to 28 0C in fresh- and sea-water, Aquaculture. 234: 589-600.

29. Rifai, M. N., T. Astatkie, M. Lacko-Bartošová, and  P. Otepka  (2004), Evaluation of thermal, pneumatic, and biological methods for controlling Colorado Potato Beetle (Leptinotarsa Decemlineata Say). Potato Research. 47: 1-9.

28. Astatkie, T., E. Yiridoe and S. J. Clark (2003), Testing for trend in variability of climate data: measures and temporal aggregation with applications to Canadian data, Theoretical and Applied Climatology. 76: 235-247. 

27. Asiedu, S., T. Astatkie and E. Yiridoe  (2003), The effect of seed-tuber physiological age and cultivar on early potato production, Journal of Agronomy and Crop Science.  189: 176-184.

26. Duston, J., T. Astatkie and P.F. MacIsaac (2003), Long-to-short photoperiod in winter halves the incidence of sexual maturity among Arctic charr, Aquaculture. 221: 567-580.

25. Kyei-Boahen, S., T. Astatkie, R. Lada, R. Gordon and C. Caldwell (2003), Gas exchange of carrot leaves in response to elevated CO2 concentration, Photosynthetica. 41: 597-603.

24. Kyei-Boahen, S., R. Lada, T. Astatkie, R. Gordon and C. Caldwell (2003), Response of carrots to varying irradiance levels, Photosynthetica. 41: 301-305.

23. Pruski, K., T. Astatkie, P. Duplessis, T. Lewis J. Nowak and P. C. Struik (2003), Use of Jasmonate for conditioning of potato plantlets and microtubers in greenhouse production of minitubers, American Journal of Potato Research. 80: 183-193.

22. Pruski, K., T. Astatkie, P. Duplessis, L. Stewart, J. Nowak and P. C. Struik (2003), Manipulation of microtubers for direct field utilization in seed production, American Journal of Potato Research. 80: 173-181.

21. Wang-Pruski, G., T. Astatkie, H. De Jong, and Y. Leclerc (2003), Genetic and environmental interactions affecting potato after-cooking darkening. Acta Horticulturae. 619:45-52.

20. Fredeen, A. H., T. Astatkie, R. W. Jannasch and R. C. Martin (2002), The productivity of grazing holstein cows in Atlantic Canada, Journal of Dairy Science. 85: 1331-1338.

19. Pruski, K., T. Astatkie and J. Nowak (2002), Jasmonate effects on In Vitro tuberization and tuber bulking in two potato cultivars under different media and photoperiod conditions, InVitro Cellular and Developmental Biology-Plant (IVCDB-Plant). 38(2): 203-209.

18. Pruski, K., T. Astatkie, M. Mirza and J. Nowak (2002), Photoautotrophic micropropagation of Russet Burbank Potato, Plant Cell, Tissue and Organ Culture.  69(2): 197-200.

17. Rifai, M. N., T. Astatkie, M. Lacko-Bartošová, and  J. Gadus  (2002), Effect of two different thermal units and three types of mulch on weeds in apple orchards, Journal of Environmental Engineering and Science. 1(5): 331-338.

16. Astatkie, T. (2001), Threshold parameter estimation in high-frequency time series, Journal of Ethiopian Statistical Association.  11: 27-42.

15. Astatkie, T., A. Madani, R. Gordon, K. Caldwell and N. Boyd (2001), Seasonal variation of nitrate-nitrogen in the soil profile in a subsurface drained field, Canadian Biosystems Engineering Journal. 43: 1.1-1.6.

14. Boyd, N. S., T. Astatkie, A. H. Fredeen and R. C. Martin (2001), Rotationally stocked beef cattle responses to daily and weekly residence, Journal of Range Management.  54(1): 39-43.

13. Pruski, K., P. Duplessis, T. Lewis, T. Astatkie, J. Nowak and P. C. Struik (2001), Jasmonate effect on In Vitro tuberization of potato (Solanum tuberosum L.) cultivars under light and dark conditions, Potato Research.  44: 315-325.

12. Clark, J. S., E. K. Yiridoe, N. D. Burns and T. Astatkie (2000),   Regional climate change: trend analysis of temperature and precipitation series at selected Canadian sites, Canadian Journal of Agricultural Economics. 48: 27-38.

11. Gordon, R., A. Madani, K. Caldwell, N. Boyd, T. Astatkie and R. Jamieson (2000), Subsurface Nitrate-N leaching loss as affected by drainage size and depth in a shallow slowly permeable soil, Canadian Water Resources Journal.  25(4): 331-341.

10. Pruski, K. W., T. Lewis, T. Astatkie and J. Nowak (2000), Micropropagation of Chokecherry and Pincherry cultivars, Plant Cell, Tissue and Organ Culture.  63(2): 93-100.

9. Pruski, K., T. Kozai, T. Lewis, T. Astatkie and J. Nowak (2000), Sucrose and light effects on In Vitro cultures of potato, chokecherry and saskatoon berry during low temperature storage, Plant Cell, Tissue and Organ Culture. 63(3): 215-221.

8. Webb, K. T., C. Wang, T. Astatkie and D. R. Langille (2000), Spatial and temporal trends in soil properties at a soil quality benchmark site in Central Nova Scotia, Canadian Journal of Soil Science.  80: 567-575.

7. Brewster, G. R. and T. Astatkie (1999), The depth distribution of 137Cs in non-eroded soil profiles, Annapolis Valley, Nova Scotia, Canada, Radiochimica Acta. 86: 175-182.

6. Astatkie, T. and W. E. Watt (1998), Multiple input Transfer Function modeling of daily streamflow series using nonlinear inputs, Water Resources Research. 34(10): 2717-2725.

5. Martin, R. C., T. Astatkie and J. M. Cooper (1998a), The effect of soybean variety on corn-soybean intercrop biomass and protein yields, Canadian Journal of Plant Science.  78: 289-294.

4. Martin, R. C., T. Astatkie and J. M. Cooper (1998b), The effect of Bradyrhizobium strains on monocropped and intercropped soybean (Glycine max. L. Merr.) biomass and protein, Journal of Agronomy and Crop Science.  181(1): 1-6.

3. Astatkie, T., D. G. Watts and E. W. Watt (1997), Nested Threshold Autoregressive (NeTAR)  Models, International Journal of Forecasting. 13(1): 105-116.

2. Astatkie, T. S. Welling and A. Madani (1997), Comparing subsurface drain size and depth using a nonlinear regression model, Canadian Water Resources  Journal. 22(2): 213-222.

1. Astatkie, T., E. W. Watt and D. G. Watts (1996), Nested Threshold Autoregressive (NeTAR) Models for studying sources of nonlinearity in streamflows, Nordic Hydrology. 27(5): 323-336.

Book Chapters:

1. Sibley, K. J., G. R. Brewster, T. Astatkie, J. F. Adsett and P. C. Struik (2010), In-field measurement of soil nitrate using an ion-selective electrode. In M. K. Sharma (Ed) Advances in Measurement Systems, Sciyo.com, (ISBN 978-953-307-061-2, 592 pages) P1-28.

In Statistics Proceedings

7. Astatkie, T. and J. Duston (2008), Determining dispersion effect in cultured fish,  In 2008 Proceedings of the American Statistical Association, Physical and Engineering Sciences Section [CD-ROM]. Alexandria, VA: American Statistical Association. 4478-4484.

6. Astatkie, T. (2006), Application of two-level un-replicated factorial designs in agricultural field experiments,  In 2006 Proceedings of the American Statistical Association, Physical and Engineering Sciences Section [CD-ROM]. Alexandria, VA: American Statistical Association. 1691-1696.

5. Astatkie, T. (2004), Forecasting performance measures for time series models,  In 2004 Proceedings of the American Statistical Association, Business and Economic Statistics Section [CD-ROM]. Alexandria, VA: American Statistical Association. 1040-1044.

4. Astatkie, T., E. K. Yiridoe and J. Stephen Clark (2002), Testing for trend in the variability of monthly and seasonal temperature using the range and the standard deviation as measures of variability,  in 2002 Proceedings of the American Statistical Association, Statistics and the Environment Section [CD-ROM]. Alexandria, VA: American Statistical Association. 79-83.

3. Astatkie, T. (2000), Comparing Linear and Nonlinear Time Series Models for Real-time Forecasting of Daily Streamflows, in 2000 Proceedings of the American Statistical Association, Statistics and the Environment Section. Alexandria, VA: American Statistical Association. 71-76.

2. Astatkie, T. (1998), Modeling Nonlinear Time Series by Denonlinearizing the Inputs: A Case Study in Hydrology, in 1998 Proceedings of the American Statistical Association, Statistics and the Environment Section. Alexandria, VA: American Statistical Association.  97-102.

1. Astatkie, T., S. Welling and A. Madani (1996), Application of a  Nested Exponential Model with Autocorrelated  Residuals in Drainage Engineering, in 1996 Proceedings of the American Statistical Association, Physical and Engineering Sciences Section. Alexandria, VA: American Statistical Association.  99-104.