Affiliate faculty member in Department of Horticulture, WSU Viticulture and Enology Program, and WSU Center for Precision and Automated Agricultural Systems
Google Scholar total research citations: 722 h-index: 14 i10-index: 26
- Ph.D. University of Wyoming, Plant Sciences (Watershed Hydrology)
- M.S. University of Wyoming, Plant Sciences (Rangeland Remediation)
- B.S. Texas A&M University, Rangeland and Forestry Management
Recent Professional Experience:
- Professor/Scientist, WSU Crop & Soil Sciences Dept., Pullman, WA 2013-present
- Associate Dean, WSU CAHNRS, Pullman, WA 1997-2013
- Director, WSU Irrigated Agriculture Research/Extension Center, Prosser, WA 2009-2013
- Director, Extension Agriculture Programs, WSU Extension, Pullman, WA 2007-2009
Peer Reviewed Publications (last 5 years):
Ma, X.C., and P.W. Jacoby. 2020 Optimizing water use efficiency for production of Chardonnay grapevine ( Vitis vinifera L.) in silt loam soils through a novel subsurface irrigation. Agronomy (In review).
Ma, X.C., P.W. Jacoby, and K.A. Sanguinet. 2020. Improving net photosynthetic rate and rooting depth of grapevines through a novel irrigation strategy in a semi-arid climate. Front. in Plant Sci. 11:575303.
Ma, X.C., K.A. Sanguinet, and P.W. Jacoby. 2020. Direct root-zone irrigation outperforms surface drip irrigation on grape yield and water use efficiency while restricting shallow root growth in a semi-arid climate. Agric. Water Manage. 231:1-11.
Ma, X.C., K.A. Sanguinet, and P.W. Jacoby. 2019. Performance of direct root-zone deficit irrigation on Vitis vinifera L. cv. Cabernet Sauvignon production and water use efficiency in semi-arid south-central Washington. Agric. Water Manage. 221:47-57. (Impact Factor: 3.565)
Chakraborty, M., L.R. Khot, S. Sankaran, and P.W. Jacoby. 2019. Evaluation of mobile 3D light detection and ranging-based canopy mapping system for tree fruit crops. Computer and Electronics in Agriculture (Impact Factor: 2.761)
Espinosa, C.Z., A.P. Rathnayake, M. Chakraborty, S. Sankaran, P.W. Jacoby, and L.R. Khot. 2018. Applicability of time-of-flight-based ground and multispectral aerial imaging for grapevine canopy vigour monitoring under direct root-zone deficit irrigation. Int’l. J. Remote Sensing. DOI: 10.1080/01431161.2018.1500047 (Impact Factor: 1.724).
Espinosa, C.Z., L.R. Khot, S. Sankaran, and P.W. Jacoby. 2017. High resolution multispectral and thermal remote sensing based water stress assessment in grapevines to evaluate subsurface irrigation technique effects. Remote Sensing 9(9):961-976; DOI: 10.3390/rs9090961. [(ISSN 2072-4292) Impact Factor 3.244].
Popular Press, Symposium, Conference Proceedings, and Abstracts
Amogi, B.R., A.K. Chandel, L.R. Khot, and P.W. Jacoby. 2020. A mobile thermal-RGB imaging tool for mapping crop water stress of grapevines. IEEE Int’l Workshop on Metrology for Agric./Forestry. Trento, ITALY, Nov. 4-6. Virtual Conf. firstname.lastname@example.org
Courtney, Ross. 2020. Underground delivery goes commercial. Good Fruit Grower. Oct,, p.40.
Vaagen, Glenn. 2020. WAVE Moment: Where does Jacoby see the deep zone irrigation into the future? Pacific Northwest AG Network. Radio Interview, Oct. 16.
Kloosterman, Stephen. 2020. Watering techniques come from Washington winegrapes. Fruit Grower News, June 17.
McCarthy, Casey. 2020. Subsurface irrigation research shows reduced water intake while increasing grape quality. Basin Business Journal, April 27
Jacoby, P.W. 2020. New irrigation method saves water in vineyards. Scientia Global. 5 p.
Jacoby, P.W. and X.C. Ma. 2019. Use of direct root zone (DRZ) subsurface drip irrigation to increase crop water use efficiency and enhance wine grape production and quality. Abstract, Northwest Center for Small Fruit Research, Annual Conference, Ferndale, WA. Dec. 2-3.
Jacoby, P.W. 2019. DRZ subsurface irrigation to enhance water conservation and improve fruit quality. Oral PowerPoint presentation to Luis A. Cetto Vineyards and Winery associates, Tijuana, Baja California, Mexico. Nov. 21. (delivered via Zoom teleconferencing).
Jacoby, P.W. and X.C. Ma. 2019. Enhancing crop water use efficiency with direct root zone micro-irrigation. Abstract 85-2 of oral presentation for Amer. Soc. Agronomy, Section: Climatology and Modeling, Symposium – Declining Aquifers: Enhancing Water Use Efficiency in Agriculture, ASA-CSSA-SSSA Ann. Meeting, San Antonio, TX., Nov. 10-14.
Khot, L.R., C.O. Stockle, R.T. Peters, and P.W. Jacoby. 2019. Role of advanced remoting sensing technologies in irrigated crop stress assessment. Abstract 115-2 of oral presentation for special session by Sensor-based Water Management Community, ASA – Climatology and Modeling Section, ASA-CSSA-SSSA Ann. Meeting, San Antonio, TX, Nov. 10-14.
Hemken, Melissa. 2019. Rethinking drip irrigation for vineyards. Western Farmer-Stockman.
Nov. 12. Story based on interviews with Pete Jacoby and Scott Williams (Kiona Winery).
Schrand, Brandon. 2019. New irrigation system cuts water use by 35 percent. American Vineyard 28(11):34-35. Story by WSU CAHNRS staff reporter published in widely-read magazine based on interviews with Pete Jacoby and Scott Williams (Kiona Vineyards).
Eralil, George. 2019. Irrigation system to use less water. Front page lead story: The Daily Evergreen, 126(3): 1. Story based on interviews with Pete Jacoby and Xiaochi Ma .
Truscott, Seth. 2019. Scientist’s involvement helps sensors send water to crops, right when they need it. WSU CAHNRS News and WSU INSIDER. March 8. Interview.
Jacoby, P.W., and X.C. Ma. 2018. Direct root-zone delivery to enhance deficit irrigation application (pdf). Ann. Meet., Irrigation Association Technical Program, Long Beach, CA. Dec. 2-6.
Jacoby, P.W., and X.C. Ma. 2018. Introducing direct root-zone deficit irrigation to conserve water and enhance grape quality in the Pacific Northwest. Crop and Soils Magazine Sept.- Oct.: pp. 34-37, 58. doi:10.2134/cs2018.51.0510
Ma, X.C., A.P. Smertenko, M. Keller, P.W. Jacoby, and K.A. Sanguinet. 2018. Enhancing crop production and water conservation through Direct Root-Zone irrigation strategy. ASA Section, Am. Soc. Agron. Ann. Meeting, Baltimore, MD. Nov. 4-7.
Jacoby, P.W., and X.C. Ma. 2018. Conserving water while increasing grape production through direct root-zone (DRZ) deficit irrigation. Ann. Meeting, Amer. Soc. Enology and Viticulture, Monterey, CA. June 18-21.
Hawkins, G., P.W. Jacoby, and X.C. Ma. 2018. Cabernet Sauvignon berry quality from vines irrigated through direct root-zone irrigation. Ann. Meeting, Amer. Soc. Enology and Viticulture, Monterey, CA. June 18-21.
Ma, X.C., K.A. Sanguinet, and P.W. Jacoby. 2018. Performance of Cabernet Sauvignon under direct root-zone deficit irrigation. Ann. Meeting, Amer. Soc. Enology and Viticulture, Monterey, CA. June 18-21.
Ma, X.C., P.W. Jacoby, and K.A. Sanguinet. 2018. Comparing effects of different irrigation rates and depths on wine grape production, grapevine growth, and root development through direct root-zone irrigation strategy. Ann. Meeting, WA Winegrowers, Kennewick, WA. Feb. 6-7.
Hawkins, G., P.W. Jacoby, X.C. Ma, and J.R. Thompson. 2018. Cabernet Sauvignon berry quality in vines watered through direct root zone irrigation. Ann. Meeting, WA Winegrowers, Kennewick, WA. Feb. 6-7. (Third place undergraduate poster contest)
Ma, X.C., P.W. Jacoby, and K.A.Sanguinet. 2017. Influences of direct root-zone deficit irrigation on wine grape production, grapevine growth, and root distribution in Pacific Northwest. In: Tech. Abs., Ann. Meeting, ASA-CSSA-SSSA. Oct. 6-10. Tampa, FL.
Ma, X.C., P.W. Jacoby, A. Torp, G. Hawkins, and L. Mongan. 2017. Effects of root-zone deficit irrigation on crop growth, fruit yield, and agroecosystem stability: using the wine grapevine Cabernet Sauvignon as a model. Ecol. Soc. America, Annual Meeting. August 6-11. Portland, OR.
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