Projects

Water Management to Improve Productivity and Protect Water Quality Appropriated (D)   Accession Number: 411545

Improved Water Use Efficiency for Vegetables Grown in the San Joaquin Valley Reimbursable (R)   Accession Number: 410016

Publications

Water Requirement of Irrigated Garlic - (Peer Reviewed Journal)

Ayars, J.E. Water requirement of irrigated garlic. Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE)51(5):1683-1688, 2008.

Field calibration accuracy and utility for four down-hole water content sensors - (Peer Reviewed Journal)

Mazahrih, N., Nedal, K., Evett, S.R., Ayars, J.E., Trout, T.J. 2008. Field calibration accuracy and utility for four down-hole water content sensors. Vadose Zone Journal. 7:992-1000.

Drainage Water Quality Issues In North America - (Peer Reviewed Journal)

Madramootoo, C.C., Johnston, W.R., Ayars, J.E., Evans, R.O., Fausey, N.R. 2007. Drainage Water Quality Issues In North America. Journal of Irrigation and Drainage Engineering. 56:535-545.

Delineating site-specific management units using geospatial ECa measurements - (Book/Chapter)

Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R., Ayars, J.E. 2008. Delineating site-specific management units using geospatial ECa measurements. In: B.J. Allred, J.J. Daniels and M.R. Ehsani (editors) Handbook of Agricultural Geophysics. CRC Press. Boca Raton, FL. Chapter 16 pp: 247-254.

Book Review of "Water Resources in Jordan: Evolving Policies for Development, the Environment, and Conflict Resolution" Munther J. Haddadin (ed) - (Peer Reviewed Journal)

Ayars, J.E. 2007. Book Review of "Water Resources in Jordan: Evolving Policies for Development, the Environment, and Conflict Resolution" Munther J. Haddadin (ed). Agricultural Water Management.Vol 93(1-2):84

In-Situ Use of Ground Water By Alfalfa - (Proceedings/Symposium)

Ayars, J.E., Shouse, P.J. 2007. In-Situ Use of Ground Water By Alfalfa. ASABE Annual International Meeting.Paper #072186, 2007 ASABE Annual Meeting

Water Requirements Of Irrigated Garlic - (Proceedings/Symposium)

Ayars, J.E. 2007. Water Requirements Of Irrigated Garlic. Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE). Paper #72285, 2007 ASABE Annual Meeting

Managing Irrigation And Drainage In Saline Environments - (Review Article)

Ayars, J.E., Christen, E., Hornbuckle, J. 2007. Managing Irrigation And Drainage In Saline Environments. CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resourcs 2007 2, No. 040.

A Processing Method for Weighing Lysimeter Data and Comparison to Micrometeorological Eto Predictions. - (Peer Reviewed Journal)

Vaughan, P.J., Trout, T.J., Ayars, J.E. 2006. A processing method for weighing lysimeter data and comparison to micrometeorological eto predictions. Agricultural Water Management, Volume 88, Issues 1-3, March 16, 2007, Pages 141-146.

Water Table Control Systems - (Book/Chapter)

Fouss, J.L., Evans, R.O., Ayars, J.E., Christen, E.W. 2007. Water Table Control Systems. Book Chapter. Design and Operation of Farm Irrigation Systems, 2nd edition; Published by the American Society of Agricultural and Biological Engineers (ASABE); Eds., G.J. Hoffman, R.G. Evans, M.E. Jensen, D.L. Martin and R. L. Elliott. Chapter 18, pp. 684-724. August 2007. ISBN: 1-892769-64-6.

Controlled Drainage for Improved Water Management in Arid Regions Irrigated Agriculture. - (Peer Reviewed Journal)

Ayars, J.E., Christen, E.W., Hornbuckle, J.W. 2006. Controlled drainage for improved water management in arid regions irrigated agriculture. Agricultural Water Management 86 (20060 128-139.

Delineating Site-Specific Irrigation Management Units Using Geospatial Eca Measurements - (Abstract)

Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R.W., Ayars, J.E. 2006. Delineating site-specific irrigation management units using geospatial eca measurements. World Congress of Soil Science. Paper No. 153-19

Technology and Practice for Irrigation in Vegetables - (Book/Chapter) - (15-May-06)

Irrigating Field Crops in the Presence of Saline Groundwater - (Peer Reviewed Journal)

Ayars, J.E., Schoneman, R.A. 2006. Irrigating field crops in the presence of saline groundwater. Journal of Irrigation and Drainage. Vol 55: 265-279.

Soil Water Content Sampling in Space and Time: a Comparison of Methods - (Abstract)

Evett, S.R., Ruthardt, B.B., Mazahrih, N., Katbehbader, N., Howell, T.A., Tolk, J.A., Ayars, J.E. 2006. Soil water content sampling in space and time: A comparison of methods [abstract]. 18th World Congress of Soil Science. Paper No. 100-3.

Effects of Shallow Groundwater Management on the Spatial and Temporal Variability of Boron and Salinity in An Irrigated Field - (Peer Reviewed Journal)

Shouse, P.J., Goldberg, S.R., Soppe, R.W., Skaggs, T.H., Ayars, J.E. 2006. Effects of shallow groundwater management on the spatial and temporal variability of boron and salinity in an irrigated field. Vadose Zone Journal. 5:377-390.

On-Farm Disposal of Saline Drainage Water - (Proceedings/Symposium)

Ayars, J.E., Basinal, L., Cervinka, V. 2006. On-farm disposal of saline drainage water. ASABE Annual International Meeting. Vol and pg nos pending.

Application of Field Phytoremediation under High Saline and Boron Conditions. - (Book/Chapter)

Banuelos, G.S., Ayars, J.E. 2005. Application of Field Phytoremediation Under High Saline and Boron Conditions. Plant Nutrition Colloquium Proceedings. pp 642-643, In: Plant nutrition for food security, human health and environmental protection. Tsinghua University Press, Beijing, China.

Recent Applications of Hydrus in Irrigated Agriculture - (Proceedings/Symposium)

Skaggs, T.H., Trout, T.J., Kelleners, T.J., Shouse, P.J., Ayars, J.E. 2005. Recent applications of hydrus in irrigated agriculture. In: S. Torkzaban and S. Majid Hassanizadeh (eds.), Proceedings of Workshop on HYDRUS Applications. October 19, 2005, ISBN 90-39341125, Department of Earth Sciences, Utrecht University, Utrecht, The Netherlands. p: 69-72.

The Resource Potential of in-Situ Shallow Ground Water Use in Irrigated Agriculture - a Review. - (Peer Reviewed Journal)

Ayars, J.E., Christen, E.W., Soppe, R.W., Meyer, W.S. 2005. The resource potential of in-situ shallow ground water use in irrigated agriculture - a review.. Irrigation Science, 2006, Vol 24: 147-160.

Grapevine Water Use and Crop Coefficient Are Linear Functions of the Shaded Area Measured Beneath the Canopy - (Peer Reviewed Journal)

Williams, L.S., Ayars, J.E. 2005. Grapevine water use and crop coefficient are linear functions of the shaded area measured beneath the canopy. Agricultural and Forest Meteorology. Vol. (132) pgs. 201-211.

Occurrence and Measurement of Salinity Stratification in the Shallow Ground Water in the Murrumbidgee Irrigation Area, South Eastern Australia. - (Trade Journal)

Northey, J., Christen, E., Ayars, J.E., Jankowski, J. 2005. Occurrence and measurement of salinity stratification in the shallow ground water in the murrumbidgee irrigation area, south eastern Australia. Agricultural Water Management, Vol 81 (2006) 23-40.

Irrigating Field Crops in the Presence of Saline Ground Water - (Proceedings/Symposium)

Ayars, J.E., Schoneman, R.A. 2005. Irrigating field crops in the presence of saline ground water. International Congress on Irrigation and Drainage. Vol, 1-B, pp 131-133.

Spatial and Temporal Distributions of Salinity and Boron in An Irrigated Field under Shallow Groundwater Management - (Proceedings/Symposium)

Shouse, P.J., Goldberg, S.R., Soppe, R.W., Skaggs, T.H., Ayars, J.E. 2005. Spatial and temporal distributions of salinity and boron in an irrigated field under shallow groundwater management. In: Proceedings of the International Salinity Forum, Managing Saline Soils and Water: Science, Technology, and Soil Issues. April 25-27, 2005. Riverside, CA pp:417-420.

Analysis of Field-Scale Salinization: a Comparison of Different Modeling Approaches - (Peer Reviewed Journal)

Vaughan, P.J., Shouse, P.J., Suarez, D.L., Van Genuchten, M.T., Ayars, J.E. 2005. Analysis of field-scale salinization: a comparison of different modeling approaches. Journal of Hydrology and Hydromechanics. 53(2):73-90.

Drip Irrigation Improves Potential Profits for Growing Peach - (Proceedings/Symposium)

Bryla, D.R., Gartung, J.L., Trout, T.J., Johnson, R.S., Ayars, J.E., 2005. Drip irrigation improves potential profits for growing peach. California Plant and Soil Conference Proceedings. 111-115.

Weighing Lysimeters for Studying Tree and Vine Water Relations. - (Peer Reviewed Journal)

Johnson, R.S., Williams, L.E., Ayars, J.E., Trout, T.J. 2005. Weighing lysimeters for studying tree and vine water relations.. California Agriculture. Apr-Jun 2005, pgs. 133-136.

Occurrence and Measurement of Salinity Stratification in Shallow Groundwater in the Murrumbidgee Irrigation Area, South-Eastern Australia. - (Peer Reviewed Journal)

Northey, J., Christen, E.W., Ayars, J.E., Jankowski, J. 2005. Occurrence and Measurement of Salinity Stratification in Shallow Groundwater in the Murrumbidgee Irrigation Area, South-Eastern Australia. Agricultural Water Management. Vol. 81, pp 23-40.

Water Use of Thompson Seedless Grapevines As Affected by the Application of Gibberellic Acid (Ga3) and Trunk Girdling - Practices to Increase Berry Size - (Peer Reviewed Journal)

Williams, L.E., Ayars, J.E. 2005. Water use of thompson seedless grapevines as affected by the application of gibberellic acid (ga3) and trunk girdling - practices to increase berry size. Agricultural and Forest Meteorology Conference Proceedings. Vol. 129, pgs. 85-94.

Water Use of Thompson Seedless Grapevines As Affected by the Application of Gibberellic Acid (Ga3) and Trunk Girdling - Practices to Increase Berry Size. - (Peer Reviewed Journal)

Williams, L.E., Ayars, J.E. 2005. Water use of thompson seedless grapevines as affected by the application of gibberellic acid (ga3) and trunk girdling - practices to increase berry size.. Agricultural and Forest Meteorology.

Controlled Water Table Management As a Strategy for Reducing Salt Loads from Subsurface Drainage under Perennial Agriculture in Semi-Arid Australia. - (Peer Reviewed Journal)

Hornbuckle, J.W., Christen, E.W., Ayars, J.E., Faulkner, R.D. 2005. Controlled water table management as a strategy for reducing salt loads from subsurface drainage under perennial agriclture in semi-arid australia.. Journal of Irrigation and Drainage Systems. Vol. 19: 145-159.

Frequency Dependence of the Complex Permittivity and Its Impact on Dielectric Sensor Calibration in Soils - (Peer Reviewed Journal)

Kelleners, T.J., Robinson, D.A., Shouse, P.J., Ayars, J.E., Skaggs, T.H., 2005. Frequency dependence of the complex permittivity and its impact on dielectric sensor calibration in soils. Soil Science Society of America Journal. 69:67-76.

Inverse Analysis of Upward Water Flow in a Groundwater Table Lysimeter - (Peer Reviewed Journal)

Kelleners, T.J., Soppe, R.W., Ayars, J.E., Simunek, J., Skaggs, T.H. 2005. Inverse analysis of upward water flow in a groundwater table lysimeter. Vadose Zone Journal. Vol 4: 558-572 (2005)

Improving Water Management in Irrigated Agriculture. - (Proceedings/Symposium)

Ayars, J.E. 2004. Improving water management in irrigated agriculture.. USCID International Conference. Proceedings 2004 Water Management Conference. Water right and Related Water Supply Issues, pg 375-384.

Integrated Water Management for Saline Drainage Water Disposal - (Proceedings/Symposium)

Ayars, J.E., Soppe, R.W. 2004. Integrated water management for saline drainage water disposal. National Salinity Engineering Conference Proceedings. Engineers Australia, Engineering Salinity Solutions, (no volume), pp 9-14.

Best Management Practaices for Minimizing Salt Loads from Subsurface Drainage Systems. - (Proceedings/Symposium)

Christen, E.W., Ayars, J.E., Hornbuckle, H.W. Best management practaices for minimizing salt loads from subsurface drainage systems.. Agricultural Engineering International Conference Proceedings. CD publication of ICID, March 14-17, 2004.

Methodology to Assess the Performance of Subsurface Drainage Salinity Control. - (Proceedings/Symposium)

Christen, E.W., Hornbuckle, J.W., Ayars, J.E. 2004. Methodology to assess the performance of subsurface drainage salinity control.. National Salinity Engineering Conference Proceedings. Engineers Australia, Engineering Salinity Solutions, pp 21-25.

Boron Transport Within An Agricultural Field: Uniform Flow Versus Mobile-Immobile Model Simulations - (Peer Reviewed Journal)

Vaughan, P.J., Shouse, P.J., Suarez, D.L., Goldberg, S.R., Ayars, J.E. 2004. Boron transport within an agricultural field: uniform flow versus mobile-immobile model simulations. Soil Science. 169(6):401-412.

Characterizing Soil Spatial Variability for Precision Agriculture Using Geophysical Measurements - (Proceedings/Symposium)

Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R., Ayars, J.E. 2004. Characterizing soil spatial variability for precision agriculture using geophysical measurements. Proceedings of 17th Annual Symposium on the Application of Geophysics to Engineering and Environmental Problesm (SAGEEP). Colorado Springs, CO on February 22-26, 2004. CDROM.

Integrating Em Survey, Soil Sampling and Watertable Data to Manage Subsurface Drainage for Salt Discharge Reduction:a Base Study. - (Proceedings/Symposium)

Christen, E.W., Hornbuckle, J., Herath, S., Ayars, J.E., Soppe, R.W. 2004. Integrating em survey, soil sampling and watertable data to manage subsurface drainage for salt discharge reduction:a base study.. 2nd International Conference and Workshop on the Coffee Berry Borer. No vol or pgs, on CD ROM.

Calibration of Capacitance Probe Sensors in a Saline Silty Clay Soil - (Peer Reviewed Journal)

Kelleners, T.J., Soppe, R.W., Ayars, J.E., Skaggs, T.H. 2004. Calibration of capacitance probe sensors in a saline silty clay soil. Soil Science Society of America Journal. 68:770-778.

Influence of Soil Spatial Variability on Crop Yield Variability - (Abstract)

Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R., Jobes, J.A., Fargerlund, J., Ayars, J.E. 2003. Influence of soil spatial variability on crop yield variability. Soil Science Society of America. Paper No. S05-corwin929996-P.

Calibration of Capacitance Probe Sensors Using Electric Circuit Theory - (Abstract)

Kelleners, T.J., Soppe, R., Robinson, D., Schaap, M., Ayars, J.E., Skaggs, T.H. 2003. Calibration of capacitance probe sensors using electric circuit theory. CD-ROM. Agronomy Abstracts. Denver, CO.

Field Crop Production in Areas with Saline Soils and Shallow Saline Ground Water in the San Joaquin Valley of California. - (Book/Chapter)

Ayars, J.E. 2003. Field crop production in areas with saline soils and shallow saline ground water in the san joaquin valley of california.. Journal of Crop Production. Vol. 7, No 1/2: pg 353-386.

Growth and Early Production of Young Peach Trees Irrigated by Furrow, Microsprinkler, Surface Drip, Or Subsurface Drip. - (Peer Reviewed Journal)

BRYLA, D.R., TROUT, T.J., AYARS, J.E., JOHNSON, S. 2003. GROWTH AND EARLY PRODUCTION OF YOUNG PEACH TREES IRRIGATED BY FURROW, MICROSPRINKLER, SURFACE DRIP, OR SUBSURFACE DRIP.. HORTSCIENCE. 2003. Vol. 38 (6) pp 1112-1116.

Introduction of Book Titled Microirrigation for Crop Production - (Book/Chapter)

Ayars, J.E., Bucks, D.A., Lamm, F.R., Nakayama, F.S. 2006. Introduction of book titled microirrigation for crop production. Microirrigation International Conference Proceedings. Book/Chapter, Chapter 1, pgs 1-26.

Calibration of Capacitance Probe Sensors Using Electric Circuit Theory - (Peer Reviewed Journal)

Kelleners, T.J., Soppe, R.W., Robinson, D.A., Schaap, M.G., Ayars, J.E., Skaggs, T.H. 2004. Calibration of capacitance probe sensors using electric circuit theory. Soil Science Society of America Journal. 68:430-439.

Automation - (Book/Chapter)

Ayars, J.E., Phene, C.J. 2006. Automation. Book Chapter. Chapter 7 Microirrigation for Crop Production, pgs 259-284.

Microirrigation for Crop Production - (Book/Chapter)

Lamm, F.R., Ayars, J.E., Nakayama, F.S. 2006. Microirrigation for Crop Production. Amsterdam: Elsevier. 618 p.

Strategies for Reducing Subsurface Drainage in Irrigated Agraiculture Through Improved Irrigation. - (Peer Reviewed Journal)

Irrigation and Drainage Systems 16: 261-277, 2002.

Preplant Irrigation - (Popular Publication)

Ayars, J.E. 2003. Preplant irrigation. Encyclopedia of Water Science. On line publication, March 2003, pg. 498-501.

Irrigation Scheduling of Cotton with Fdr Probes in the Presence of Shallow Saline Groundwater - (Other)

Ayars, J.E., Soppe, R. 2002. Irrigation scheduling of cotton with fdr probes in the presence of shallow saline groundwater. Transactions of First International Symposium on Soil Water Measurement Using Capacitance Impedance and TDT. No vol. or pgs. on CD ROM.

Irrigation Strategies for Improving Productivity and Water Use Efficiency of Vegetable Crops in the San Joaquin Valley. - (Proceedings/Symposium)

BRYLA, D.R., SEFTON, R.K., SOPPE, R., GARTUNG, J.L., TROUT, T.J., AYARS, J.E. 2002. IRRIGATION STRATEGIES FOR IMPROVING PRODUCTIVITY AND WATER USE EFFICIENCY OF VEGETABLE CROPS IN THE SAN JOAQUIN VALLEY.. ASA-CSSA-SSSA PROCEEDINGS.

Numerical Modeling of Subsurface Drip Irrigation - (Abstract)

Skaggs, T.H., Simunek, J., Ayars, J.E., Trout, T.J. Numerical modeling of subsurface drip irrigation. Agronomy Abstracts. In Annual meetings abstracts (CD-ROM). ASA, CSSA, and SSSA, Madison, WI.

Chapter 6 Design and Management of Reclaimed Water Irrigation Systems - (Book/Chapter)

Christen, E., Ayars, J.E., Hornbuckle, J., Biswas, T. 2006. Chapter 6 design and management of reclaimed water irrigation systems. Australian Journal of Soil Research, Chapter 6, pp 107-123.

Strategies for Reducing Deep Percolation in Irrigated Agriculture. - (Peer Reviewed Journal)

Hanson, B.R., Ayars, J.E. 2002. Strategies for reducing deep percolation in irrigated agriculture. Journal of Irrigation and Drainage Systems. Vol. 16(4):261-277.

Identifing Soil Properties That Influence Cotton Yield Using Soil Sampling Directed by Apparent Bulk Soil Electrical Conductivity - (Peer Reviewed Journal)

Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R.W., Ayars, J.E. 2003. Identifing soil properties that influence cotton yield using soil sampling directed by apparent bulk soil electrical conductivity. Agronomy Journal. Vol 95:352-364

Characterizing Ground Water Use by Safflower Using Weighing Lysimeters. - (Peer Reviewed Journal) - (19-Mar-02)

Best Management Practices for Subsurface Drainage and System Design and Management for Irrigated Agriculture - (Proceedings/Symposium)

Ayars, J.E., Christen, E.W. 2002. Best management practices for subsurface drainage and system design and management for irrigated agriculture. Proceedings of the USCID Wetlands Seminar. No Vol., pg. 187-196.

Reducing Irrigation in the Presence of Shallow Groundwater Using the Cotton 21c Model - (Proceedings/Symposium)

Ayars, J.E., Soppe, R., Marani, A. 2002. Reducing irrigation in the presence of shallow groundwater using the cotton 21c model. Proceedings 18th Congress of International Committee of Irrigation and Drainage. No vol. or pgs. on CD ROM.

Subsurface Drainage System Design and Management in Irrigated Agriculture Best Management Practices for Reducing Drainage Volume and Salt Load. - (Other)

Christen, E.W., Ayars, J.E. 2001. Subsurface drainage system design and management in irrigated agriculture best management practices for reducing drainage volume and salt load.. CSIRO Australia Griffith NSW. Technical Report 38/01, pg 136.