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Book of Abstracts California Plant and Soil Conference Monday-Wednesday, February 1-3, 2021 Book of Abstracts http://calasa.ucdavis.edu Virtual Event via Zoom Table of Contents Thank You to Our Sponsors ................................................................................................................. iii 2020-2021 Executive and Governing Board Members ......................................................................... iv California Chapter Honorees ................................................................................................................ v 2021 Honorees .................................................................................................................................... vi Keith Backman ......................................................................................................................................... vi Marsha L. Campbell ............................................................................................................................... viii Agenda ................................................................................................................................................ 1 Special Session: COVID-19 Impacts ....................................................................................................... 4 Economic Impacts of the Pandemic on California Crop Agriculture: Assessment of the Data and the Path Forward ............................................................................................................................................. 4 Session 1: Automation in Agriculture ................................................................................................... 5 Challenges and Opportunities for Artificial Intelligence and Automation in the US Southwest .............. 5 Prospects of Autonomous Spraying .......................................................................................................... 5 Robotic Harvest-aid Technologies ............................................................................................................ 6 Session 2: Remote Sensing Chairs: Florence Cassel and Michael Cahn .................................................. 7 Applications of Remote Sensing for Irrigation Management in California ............................................... 7 High Resolution Aerial Imagery to Assist in the Production of Cool Season Vegetables .......................... 8 High Resolution Nitrogen Monitoring in Vineyard ................................................................................... 8 Session 3: Irrigation Optimization ........................................................................................................ 9 Updated Information on Water Use of Micro-Irrigated Pistachio Grown on Non-Saline and Increasingly Salt-affected Soils in the San Joaquin Valley of California ........................................................................ 9 Practical Uses of Evapotranspiration Data for Irrigation Scheduling ...................................................... 10 Precision Water Management in Western Great Plains Irrigated Agriculture ....................................... 10 Session 4: Nutrient Management ....................................................................................................... 11 Subsurface Drip Irrigation System Utilizing Dairy Manure Effluent within Dairy Forage Crops ............. 11 Soil Organic Matter as a Source of Plant-available Nitrogen .................................................................. 12 Early Nitrogen Fertilization is Important on First-year Second Generation Almond Trees Following Whole Orchard Recycling ........................................................................................................................ 12 Session 5: Cover Cropping .................................................................................................................. 14 Managing Cover Crops in Orchards: A Case Study of Aphid Populations in Pecan Orchard with Cover Crops ....................................................................................................................................................... 14 Comparing Cover Crop Mixtures to Cover Crop Monocultures .............................................................. 14 Planting Cover Crop into Vegetable Crop Residue ................................................................................. 15 Session 6: Evaluation and Criteria for Assessing Biological Inputs ....................................................... 16 Evaluation and Criteria for Assessing Biofertilizers and Biostimulants .................................................. 16 Development, Implementation, and Integration of Biologicals in Pest and Nutrient Management ..... 16 Management of Soil-Borne Plant Pathogens with Organic Amendments ............................................. 16 i Session 7: Practical Indicators of Soil Health ....................................................................................... 17 Biological Soil Health: What We Can and Cannot Learn from Common Microbial Indicators ............... 17 The Role of Soil Organic Matter in Coupling the Carbon and Nitrogen Cycles in Orchards ................... 17 Evaluating Soil Physical Properties in Response to Soil Management ................................................... 17 Session 8: Pest Management ............................................................................................................. 19 Alternatives to Neonicotinoid and Broad Spectrum Pesticides in Strawberry ....................................... 19 Neonicotinoid Alternatives in Citrus ....................................................................................................... 19 Is IPM Possible? Alternative Control Tactics in Vegetables from California Central Coast .................... 20 Student Research Presentations ........................................................................................................ 21 Evaluation of Sorghum (Sorghum bicolor) Yield and Nutritional Quality to Varying Irrigation and Nitrogen Fertilization Regimes, in Comparison with Corn (Zea mays) ................................................... 21 Impacts of Native and Introduced Cover Crops in a Table Grape Vineyard in the San Joaquin Valley .. 21 Compost Effects on Agroecosystem Soil C and N Cycling Dynamics ...................................................... 22 Insecticide Resistance Monitoring in California Populations of Alfalfa Weevil (Hypera postica) ........... 22 Statewide Collaborative Needs Assessment for California Agronomy ................................................... 23 Vittatalactone, an Aggregation Pheromone from the East, Attracts Cucumber Beetles from the West ................................................................................................................................................................ 23 The Effect of Grapevine Age (Vitis vinifera L. cv. Zinfandel) on Vine Performance in the Central Coast of California ............................................................................................................................................. 24 Crop Rotations in California Rice Systems – Baseline Assessment of Challenges and Opportunities .... 24 Response of Alfalfa Varieties to Saline, Sub-Surface Drip Irrigation: How to Account for Spatial Variability in Soil Salinity in Variety Comparisons? ................................................................................. 26 The Effect of Different Crop Residues on Soil Nitrogen Turnover .......................................................... 27 Impact of Airjection® Irrigation on Glutathione Levels in Tomatoes ...................................................... 27 APPENDICES ......................................................................................................................................... 1 California Chapter Presidents ............................................................................................................... ii 2021 Business Meeting Agenda ........................................................................................................... iii Persons nominated by the Executive Committee to serve on the Governing Board ............................. iv Marja Koivunen ........................................................................................................................................ iv Sarah Light................................................................................................................................................ iv Ranjit Riar ................................................................................................................................................. iv 2020 Business Meeting Minutes ........................................................................................................... v Constitution and By-laws of the California Chapter of the American Society of Agronomy ................. vii Index of Primary Authors/Presenters ................................................................................................. xiii ii Thank You to Our Sponsors iii 2020-2021 Executive and Governing Board Members California Chapter – American Society of Agronomy EXECUTIVE BOARD MEMBERS Role Name Title and Affiliation Agronomist President Eric Ellison Plant Response, Inc. [email protected] Associate Professor 1st Vice President Florence
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