Dr. Aliasghar Montazar

UCCE Irrigation and Water Management Advisor
UC Cooperative Extension Advisor in Imperial & Riverside & San Diego Counties
1050 East Holton Road
Holtville, CA 92250-9615
(442) 265-7707
amontazar@ucanr.edu Create VCard

Also in:
Imperial County
Riverside County


Dr. Ali Montazar has a PhD in Irrigation and Drainage and currently is an Irrigation and Water Management Advisor with the University of California Cooperative Extension. He has more than 23 years of research, extension, teaching, and technical consulting experience and has served in several leadership positions in agricultural water management and irrigation engineering in California and abroad. He has a well-developed applied research and training program in southern California, and currently has several ongoing irrigation and water conservation studies in alfalfa, avocados, artichoke, carrots, date palm, spinach, lettuce, sweet corn, sugar beets, onions, and wine grapes. His focus is sensor-based irrigation management, water conservation, drainage and salinity management, and best irrigation and nutrient management practices.         



Irrigation and water management, measurement and modeling of surface energy balance variables/ET and crop coefficients, irrigation scheduling, drainage and water quality, on-farm irrigation system management and evaluation, salinity management and control practices, deficit irrigation, environmental instrumentation and modelling.

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Clark, K.J., Anchieta, A., Cavanaugh, K., Martin, F.N., Correll, J., Montazar, A., Putman, A.I., Klosterman, S.J. (2023).  Multiplex quantitative PCR assay for detection of spinach and lettuce downy mildews using spore trapping. PhytoFrontiers, 1-34.  https://doi.org/10.1094/PHYTOFR-04-23-0045-FI.

  • Montazar, A. (2023). Agricultural water conservation: tools, strategies, and practices – Series II (Book). MDPI, 246 pages, ISBN 978-3-0365-9704-1 (Editor); https://www.mdpi.com/books/book/8479-agricultural-water-conservation-tools-strategies-and-practices-series-ii

  • Sapkota, A., Haghverdi, A., Montazar, A. (2023). Estimating fall-harvested alfalfa (Medicago sativa L.) yield using unmanned aerial vehicle–based multispectral and thermal images in southern California. Agrosystems, Geosciences and Environment.  6 (2): 1-13. https://doi.org/10.1002/agg2.20392.

  • Montazar, A., Putnam, D. (2023). Evapotranspiration and yield impact tools for more water-use efficient alfalfa production in desert environments. Agriculture, 13(11):2098. https://doi.org/10.3390/agriculture13112098.

  • Montazar, A. (2021). Agricultural Water Conservation: Tools, Strategies, and Practices (Book). MDPI, 242 pages, ISBN 978-3-0365-2647-8 (Editor); https://doi.org/10.3390/books978-3-0365-2647-8

  • Montazar, A. (2021). Irrigation Tools and Strategies to Conserve Water and Ensure a Balance of Sustainability and Profitability. Agronomy, 11 (10), 2037, https://doi.org/10.3390/agronomy11102037

  • Montazar, A., Geisseler, D., Cahn, M. (2021). Spatial Variability of Nitrogen Uptake and Net Removal and Actual Evapotranspiration in the California Desert Carrot Production System. Agriculture, 11 (8), 752. https://doi.org/10.3390/agriculture11080752

  • Montazar, A., Krueger, R., Corwin, D., Pourreza, A., Little, C., Rios, S., Snyder, R.L. (2020). Determination of Actual Evapotranspiration and Crop Coefficients of California Date Palms Using the Residual of Energy Balance Approach. Water 12(8), 2253; https://www.mdpi.com/2073-4441/12/8/2253.  

  • Montazar, A., Bachie, O., Corwin, D., Putnam, D. (2020). Feasibility of Moderate Deficit Irrigation as a Water Conservation Tool in California’s Low Desert Alfalfa. Agronomy 10 (10), 1640. https://www.mdpi.com/2073-4395/10/11/1640.

  • Montazar, A. (2019). Agricultural Irrigation (Book). MDPI, 172 pages, ISBN 978-3-03921-922-3 (Editor); https://www.mdpi.com/books/pdfview/book/1857.

  • Montazar. A., Cahn, M., Putman, A. (2019). Research advances in adopting drip irrigation for California organic spinach: Preliminary findings. Agriculture, 9(8), 177; https://doi.org/10.3390/agriculture9080177.

  • Lu, Y.Z., Liu, P., Montazar, A., Paw, K.T., Hu, Y.G. (2019). Soil water infiltration model for sprinkler irrigation control strategy: A case for tea plantation in Yangtze River region. Agriculture, 9(10), 206; https://doi.org/10.3390/agriculture9100206.

  • Zaccaria, D., Carrillo-Cobo, T., Montazar A., Putnam, D., Bali, K. (2017). Assessing the viability of sub-surface drip irrigation for resource-efficient alfalfa production in Central and Southern California. Water, 9(11), 837; https://doi.org/10.3390/w9110837.

  • Montazar, A., Zaccaria, D., Bali, K., Putnam, D. (2017). A model to assess the economic viability of alfalfa production under subsurface Drip Irrigation in California. Irrigation and Drainage, 66: 90–102. doi: 10.1002/ird.2091.

  • Montazar, A., Rejmanek, H., Tindula, G.N., Little, C., Shapland,T.M., Anderson, F.E., Inglese, G., Mutters, R.G., Linquist, B., Greer, C.A., Hill, J.E., Snyder, R.L. (2016). Crop coefficient curve for paddy rice from residual of the energy balance calculations. Journal of Irrigation and Drainage Engineering, DOI: 10.1061/(ASCE)IR.1943-4774.0001117.

  • Snyder, R.L, Pedras, C., Montazar, A., Henry, M.J., Ackley, D. (2015). Advances in ET-based urban landscape irrigation management. Agricultural Water Management 147:187-197.

  • Montazar, A. (2013). A decision tool for optimal irrigated crop planning and water resources sustainability. Global Optimization 55 (3): 641-654.

  • Montazar, A., Nasiri Gheidari, O., Snyder, R.L. (2013). A fuzzy analytical hierarchy methodology for the performance assessment of irrigation projects. Agricultural Water Management 121:113-123.

  • Montazar, A., Gaffari, A. (2012). An AHP model for crop planning within irrigation command areas. Irrigation and Drainage 61 (2):168-177.

  • Valipour, M, Montazar, A. (2012). Optimize of all effective infiltration parameters in furrow irrigation using Visual Basic and Genetic Algorithm Programming. Australian Journal of Basic and Applied Sciences, 6(6): 132-137.

  • Valipour, M, Montazar, A. (2012). Sensitive analysis of optimized infiltration parameters in SWDC model. Advances in Environmental Biology 6(9):2574-2581.

  • Valipour, M, Montazar, A. (2012).An Evaluation of SWDC and WinSRFR Models to Optimize of Infiltration Parameters in Furrow Irrigation. American Journal of Scientific Research 69:28-142.

  • Montazar, A. and Snyder, R.(2012). A multi-attribute preference model for optimal irrigated crop planning under water scarcity condition. Spanish Journal of Agricultural Research 10 (3):826-837.

  • Montazar, A. and Isapoor, S. (2012). Centralized downstream PI controllers for the west canal of Aghili irrigation district. Agricultural Science and Technology, Vol. 14:375-388.

  • Montazar A. Mohseni M. (2011). Optimizing wheat water productivity as affected by irrigation and fertilizer-nitrogen regimes in an arid environment. Agricultural Science 3(3):143-158.

  • Montazar, A., Azadegan, B. (2011). Effects of seasonal water use and applied N fertilizer on wheat water productivity indices. Irrigation and Drainage 61 (1): 52-59.

  • Montazar A., Mohsen M. (2011). Influence of supplemental irrigation and applied nitrogen on wheat productivity and yields. Agricultural Science 3 (1): 1: 78-90.

  • Isapoor, S., Montazar, A., van Overloop, P.J., van de Giesen, N. (2011). Designing and evaluation control systems of the Dez main canal. Irrigation and Drainage 60(1): 70-79.

  • Montazar, A. (2010). The influence of Stockosorb Polymer the advance time and infiltration parameters in short furrow. Applied Irrigation Science.

  • Montazar, A., Riazi, H., Behbahani, S.M. (2010). Conjunctive water use planning in an irrigation command area. Water Resources Management 24: 2817-2832.

  •  Montazar, A. (2010). Predicting alfalfa hay production as related to water distribution functions. Irrigation and Drainage 59: 189-202.

  • Montazar, A. (2010). Using simulation models to determine optimum water management practices. Applied Irrigation Science.

  • Montazar, A., Zadbeghar, E. (2010). An analytical hierarchy model for assessing global water productivity of irrigation networks in Iran. Water Resources Management 24: 577-596.

  • Montazar, A. (2009). Artificial neural network modeling to predict wheat yield production and water productivity. Applied Irrigation Science, 44 (2): 187-208.

  • Montazar, A., Riazi, H. (2008). Optimization of water allocation in Qazvin irrigation command area. Applied Irrigation Science, 43(2):132-141.

  • Montazar, A., Rahimikob, A. (2008). Optimal water productivity of irrigation networks in arid and semi-arid region. Irrigation and Drainage 57: 232-243.

  • Montazar, A. (2008). Modeling alfalfa hay yield as affected by applied water and irrigation uniformity. Applied Irrigation Science 43(1):14-24.

  • Montazar, A. (2008). Assessing soil moisture uniformity as affected by sprinkler water uniformity and bed slope. Applied Irrigation Science 43(1): 43-52.

  • Montazar, A., Sadeghi, M. (2008). Effects of applied water and sprinkler irrigation uniformity on alfalfa growth and hay yield. Agricultural Water Management 95: 1279-1287.

  • Montazar, A. (2007). Field assessment of soil moisture and crop yield distribution uniformity under sprinkler irrigation. Applied Irrigation Science. 42(2): 153-165.

  • Schahbazian, N., Eitzinger, J., Montazar, A., Akbari, G., Allahdadi, I. (2007). Using simulation models to improve irrigation water application. Pakistan Journal of Water Resources, Vol. 11 (2): 43-57.

  • Montazar, A., Mahboobi Fouladi, M. (2007). Water allocation to citrus trees based on age and stem collar circumference for trickle irrigation systems. Applied Irrigation Science 42(1): 61-75.

  • Montazar, A.,Moridnejad, M. (2007). Influence of wind and bed slope on water and soil moisture distribution in solid-set sprinkler irrigation systems. Irrigation and Drainage 57: 175-185.

  • Montazar, A., Behbahani, S.M. (2007). Development of an optimized irrigation system selection model using AHP. Biosystems Engineering 98 (2): 155-165.

  • Montazar, A., Kouchazadeh, S. (2006). The sensitivity analysis of baffle distributors. Journal of Applied Irrigation Science. 41(2): 273-290.

  • Montazar, A., Salehi Neyshabouri, A. (2006). Impacts of some parameters affecting the hydraulic performance of U-shaped side spillways. Canadian Journal of Civil Engineering 33: 552-560.

  • Kouchakzadeh, S. Montazar, A. (2005). Hydraulic sensitivity indicators for canal operation assessment. Irrigation and Drainage 54: 443-454.

  • Montazar, A., van Overloop, P.J., Brouwer, R. (2005). Centralized controller for the Narmada main canal. Irrigation and Drainage 54: 79-89.

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