2007
Increasing the Yield of the "Hass" Avocado by Adding P and K to Properly-Timed Soil N Applications
Project Leader: Carol J. Lovatt

Improving the Procedure for Nutrient Sampling in Stone Fruit Trees
Project Leader: R. Scott Johnson

2006
Precision Fertigation in Orchards: Development of a Spatially Variable Microsprinkler System
Project Leader: Michael Delwiche, et al

2004
Long-term Nitrate Leaching Below the Root Zone in California Tree Fruit Orchards
Project Leader: Thomas Harter, et al

2003
Precision Horticulture: Technology Development & Research & Management Applications
Project Leader: Patrick H. Brown

Seasonal Patterns of Nutrient Uptake and Partitioning as a Function of Crop Load of the ‘Hass’ Avocado
Project Leaders: Richard Rosecrance and C. Lovatt

Effect of Nutrient Deficiencies in Stone Fruit Production and Quality
Project Leader: R. Scott Johnson

Nitrogen Management in Citrus Under Low Volume Irrigation
Project Leaders: M.L. Arpaia and L.S. Lund

2000
Location of Potassium-Fixing Soils in the San Joaquin Valley and a New, Practical Soil K Test Procedure
Project Leader: Dr. G. Stuart Pettygrove

1999
Development of an Educational Handbook on Fertigation for Grape Growers
Project Leader: Glenn McGourty

Relationship between Fertilization and Pistachio Diseases
Project Leader: Themis J. Michailides

Development Of Fertilizer And Irrigation Practices For Commercial Nurseries
Project Leaders: Richard Y. Evans, Carmen Garcia-Navarro and Linda L. Dodge

1998
Development of Nitrogen Best Management Practices for the 'Hass' Avocado
Project Leader: Carol J. Lovatt

Effect of Cover Crop or Compost on Potassium Deficiency and Uptake, and on Yield and Quality in French Prunes
Project Leaders: Dr. Richard Rosecrance, P. A. Delwiche, Fred Thomas

1997
Uniformity of Chemigation in Microirrigated Permanent Crops
Project Leaders: Larry Schwankl and T. Prichard

1996
Development of a Nitrogen Fertilizer Recommendation Model to Improve N-Use Efficiency and Alleviate Nitrate Pollution to Groundwater from Almond Orchards
Project Leader: Patrick H. Brown

Fertilizer Use Efficiency And Influence Of Rootstocks On Nutrient Uptake And Accumulation In Wine Grapes Grown In The Coastal Valleys Of California
Project Leader: Larry E. Williams

1995
Influence of Irrigation Management on Nitrogen Use Efficiency, Nitrate Movement, and Ground Water Quality in a Peach Orchard
Project Leader: Scott Johnson

Using High Rates of Foliar Urea to Replace Soil-Applied Fertilizer in Early Maturing Peaches
Project Leaders: R. Scott Johnson and Rich Rosecrance

Avocado Growers Can Reduce Soil Nitrate Groundwater Pollution and Increase Yield and Profit
Project Leader: Carol J. Lovatt

Relationship Between Fertilization And Bacterial Canker Disease In French Prune
Project Leader: Steven Southwick

1994
Effects of Four Levels of Applied Nitrogen on Three Fungal Diseases of Almond Trees
Project Leader: Beth Teviotdale

1993
Nitrogen Efficiency in Drip Irrigated Almonds
Project Leader: Robert J. Zasoski

1992
Field Evaluation of Water and Nitrate Flux Through the Root Zone in a Drip/Trickle Irrigated Vineyard
Project Leader: Donald W. Grimes

Crop Management for Efficient Potassium Use and Optimum Winegrape Quality
Project Leader: Mark A. Matthews

Potential Nitrate Movement below the Root Zone in Drip Irrigated Almonds
Project Leader: Roland D. Meyer

1991
Citrus Growers Can Reduce Nitrate Ground Water Pollution and Increase Profits by Using Foliar Urea Fertilization
Project Leader: Carol J. Lovatt

Nitrogen Fertilizer Management to Reduce Groundwater Degradation
Project Leader: Steve Weinbaum

2007
Reevaluating Tissue Analysis as a Management Tool for Lettuce and Cauliflower
Project Leader: Timothy K. Hartz

Detecting and Correcting Soil Calcium Limitations
Project Leaders: Timothy K. Hartz, R. Smith, and M. Cahn

2005
Evaluation of Polyacrylamide (PAM) for Reducing Sediment and Nutrient Concentration in Tail Water from Central Coast Vegetable Fields
Project Leaders: Michael Cahn, Husein Ajwa, Richard Smith

2004
Evaluation of Slow Release Fertilizers for Cool Season Vegetable Production in the Salinas Valley
Project Leaders: Richard Smith and T.K. Hartz

Efficient Phosphorus Management in Coastal Vegetable Production
Project Leader: Timothy K. Hartz

1999
Evaluating and Demonstrating the Effectiveness of In-Field Nitrate Testing in Drip and Sprinkler Irrigated Vegetables
Project Leader: Dr. Marc Buchanan

Effects of Irrigation Nonuniformity on Nitrogen and Water Use Efficiencies in Shallow Rooted Vegetable Cropping Systems
Project Leaders: Jeff Mitchell, L. Wu, and B. Sanden

Winter Cover Crops Before Late-Season Processing Tomatoes for Soil Quality and Production Benefits
Project Leaders: Gene Miyao, Paul Robins, Mike Cahn

1998
Development And Demonstration Of Nitrogen Best Management Practices For Sweet Corn In The Low Desert
Project Leaders: Jose L. Aguiar, Keith Mayberry, Marita Cantwell, Charles A. Sanchez

Demonstration of Presidedress Soil Nitrate Testing as an N Management Tool
Project Leader: Tim Hartz

Efficient Irrigation for Reduced Non-Point Source Pollution from Low Desert Vegetables
Project Leader: Charles. A. Sanchez

1997
Water and Fertilizer Management for Garlic: Productivity, Nutrient and Water Use Efficiency, and Postharvest Quality
Project Leaders: Marita Cantwell, Ron Voss, Blaine Hanson, Don May, Bob Rice

Drip Irrigation and Fertigation Management of Celery
Project Leader: Tim Hartz

Soil Testing to Optimize Nitrogen Management for Processing Tomatoes
Project Leaders: Don May, Jeff Mitchell, Tim Hartz, Henry Krusekopf, Gene Miyao, Michael Cahn

1996
Development and Promotion of Nitrogen Quick Tests for Determining Nitrogen Fertilizer Needs of Vegetables and Survey of Soil Residual Nitrate-Nitrogen Levels in Vegetables
Project Leaders: Richard Smith and K. Schulbach

1995
Evaluation of Controlled Release Fertilizers and Fertigation in Strawberries and Vegetables
Project Leader: Warren E. Bendixen

Evaluation of Pre-Sidedress Soil Nitrate Testing to Determine N Requirements of Cool Season Vegetables
Project Leader: T. K. Hartz

Determination of Best Nitrogen Management Practices for Broccoli Production in the San Joaquin Valley
Project Leader: Michelle Le Strange

Site Specific Farming Information Systems in a Tomato-Based Rotation in the Sacramento Valley
Project Leader: Stuart Pettygrove

Diagnostic Tools for Efficient Nitrogen Management of Vegetables Produced in the Low Desert
Project Leader: Charles Sanchez

Guide To Nitrogen Quick-Tests For Vegetables With The 'Cardy' Nitrate Meter
Project Leaders: Kurt Schulbach, Richard Smith, Tim Hartz, Louise Jackson

1994
Nitrogen Management Through Intensive On-Farm Monitoring
Project Leader: T. K. Hartz, Extension Specialist

Improvement of Nitrogen Management in Vegetable Cropping Systems in the Salinas Valley and Adjacent Areas
Project Leader: Stuart Pettygrove

1992
Optimizing Drip Irrigation Management for Improved Water and Nitrogen Use Efficiency
Project Leader: Timothy K. Hartz

2008
Fertility Management in Rice
Project Leaders: Chris van Kessel and B. Linquist

2007
Effects of Cover Cropping and Conservation Tillage on Sediment and Nutrient Losses to Runoff in Conventional and Alternative Farming Systems
Project Leader: William R. Horwath

Practical Soil Test Methods for Predicting Net N Mineralization
Project Leader: William R. Horwath

Site-Specific Variable Rate Fertilizer Nitrogen Application in Cotton
Project Leader: Richard E. Plant, et al

Soil-Solution Partitioning of Trace Elements in Cropland Soils of California: Estimating the Plant Uptake Factors of As, Cd, and Pb
Project Leader: Andrew C. Chang

2006
Ammonia Emissions Related to Nitrogen Fertilizer Application
Project Leader: Charles F. Krauter

Crop Nitrate Availability and Nitrate Leaching under Micro-Irrigation for Different Fertigation Strategies
Project Leaders: Blaine Hanson, Jan W. Hopmans

Determination of Nursery Crops Yields, Nutrient Content, and Water Use for Improvement of Water and Fertilizer Use Efficiency
Project Leader: Richard Y. Evans

2005
Development of BMP's for Fertilizing Lawns to Optimize Plant Performance and Nitrogen Uptake While Reducing the Potential for Nitrate Leaching
Project Leaders: Robert L. Green, et al

Improving the Diagnostic Capabilities for Detecting Molybdenum Deficiency in Alfalfa and Avoiding Toxic Concentrations for Animals
Project Leaders: Ronald D. Meyer, D.B. Marcum, and S. Orloff

Potassium Fertility Management for Optimum Tomato Yield and Fruit Color
Project Leader: Timothy K. Hartz

Residual Soil Nitrogen and Nitrogen Management for Acala Cotton
Project Leader: R.B. Hutchmacher, et al

Site-specific Variable Rate Fertilizer Application in Rice and Sugar Beets
Project Leaders: Richard Plant, et al

2004
Effect of Different Rates of N and K on Drip Irrigated Beauregard Sweetpotatoes
Project Leaders: Scott Stoddard and Bob Weimer

Reducing Fertilizer Needs of Potato with New Varieties and Clonal Strains of Existing Varieties
Project Leaders: Ronald Voss

2003
Development of a Leaf Color Chart for California Rice Varieties
Project Leader: Randall G. Mutters

Nitrogen Mineralization Rate of Biosolids and Biosolid Compost
Project Leaders: Timothy K. Hartz

2001
Fertilization Technologies for Conservation Tillage Production Systems in California
Project Leader: Jeff Mitchell

2000
Long-term Rice Straw Incorporation: Does It Impact Maximum Yield?
Project Leader: Chris van Kessel

1999
Nitrogen Fertilization and Grain Protein Content in California Wheat
Project Leader: L. F. Jackson

1998
Interaction of Cotton Nitrogen Fertility Practices and Cotton Aphid Population Dynamics in California Cotton
Project Leaders: Larry D. Godfrey, Robert Hutmacher

Potassium Responses in California Rice Fields as Affected By Straw Management Practices
Project Leaders: Chris van Kessel, William Horwath, John K. Williams, Eric Byous, Grace Jones

1997
Development and Testing of Application Systems for Precision Variable Rate Fertilization.
Project Leader: K. Giles

Development of Irrigation and Nitrogen-Fertilization Programs on Tall Fescue to Facilitate Irrigation-Water Savings and Fertilizer-Use Efficiency
Project Leaders: Robert L. Green, Grant J. Klein, and Victor A. Gibeault

Nitrogen Budget in California Cotton Cropping Systems
Project Leaders: William Rains and Robert L. Travis

1996
Management of Nitrogen Fertilization in Sudangrass for Optimum Production, Forage Quality and Environmental Protection
Project Leader: D. Putnam

1994
The Effects of Various Phosphorus on "No-Till" Barley Production
Project Leader: Michael J. Smith

Establishing Updated Guidelines for Cotton Nutrition
Project Leader: Bill Weir

1992
Impact of Microbial Processes on Crop Use of Fertilizers from Organic and Mineral Sources
Project Leader: Kate M. Scow

1991
Demonstration Program for Reducing Nitrate Leaching through Improvements to Irrigation Efficiency and Fertilizer/Cover Crop Management
Project Leader: G. Stuart Pettygrove

2005
Development of Lime Recommendations for California Soils
Project Leader: Robert O. Miller

Evaluating the Impact of Nutrient Management on Groundwater Quality in the Presence of Deep Unsaturated Alluvial Sediment
Project Leader: Thomas Harter, et al

2004
Teach the Teachers: Garden-based Education About Fertility and Fertilizers
Project Leader: Peggy Sears Perry

2003
Minimizing Nitrogen Runoff and Improving Nitrogen Use Efficiency in Containerized Woody Ornamentals through Management of Nitrate and Ammonium-Nitrogen
Project Leaders: Donald J. Merhaut and R.Y. Evans

2001
California State Fair Farm Upgrade Project
Project Leaders: Michael Bradley, Joe Brengle, Teresa Winovitch

The Role of Inorganic Chemical Fertilizers and Soil Amendments on Trace Element Contents of Cropland Soils in California
Project Leader: Andrew C. Chang, et al

2000
Air Quality and Fertilization Practices: Establishing a Calendar of Nitrogen Fertilizer Application Timing Practices for Major Crops in the San Joaquin Valley
Project Leader: Jack King

Improving Fertilizer Practices of SE Asians in Fresno and Tulare
Project Leaders: Richard Molinar and M. Jimenez

On-Farm Monitoring and Management Practice Tracking for Central Coast Watershed Working Groups
Project Leader: Kelly Huff

"From The Ground Up" - A Hands-On Guide to School Gardening
Project Leader: Jennifer Lombardi

"Can We Predict K Fixation in the San Joaquin Valley from the Soil Texture and Mineralogy?"
Project Leader: G. Stuart Pettygrove

1999
Nitrogen Budgeting Workshops
Project Leaders: Molly Johnson/Gwen Huff

Agricultural Baseline Monitoring and BMP Implementation: Steps Toward Meeting TMDL Compliance Deadlines Within the Newport Bay/San Diego Creek Watershed
Project Leaders: Laosheng Wu, John Kabashima

Pajaro Valley Nutrient Management Education & Outreach Project
Project Leaders: U Win, Frank Shields

1997
Agriculture and Fertilizer Education for Grades K-12
Project Leaders: Pamela Emery, Richard Engel, Judy Culbertson

1996
Survey of Changes in Irrigation Methods and Fertilizer Management Practices in California
Project Leader: John Letey, Jr.

1995
Irrigation and Nutrient Management Conference and Trade Fair
Project Leader: Danyal Kasapligil

Best Management Practices (BMPs) for Nitrogen and Water Use in Irrigated Agriculture: A Video
Project Leaders: Larry Klaas, Thomas Doerge

Western States Agricultural Laboratory Proficiency Testing Program
Project Leaders: Janice Kotuby-Amacher, Robert O. Miller

1994
Education Through Radio
Project Leader: Patrick Cavanaugh

Nutrient Recommendation Training in Urban Markets: A Video
Project Leader: Wendy Jenks

Best Management Practices for Tree Fruit and Nut Production: A Video
Project Leaders: Thomas Doerge, Larry Klaas

1993
Drip Irrigation and Nitrogen Fertigation Management for California Vegetable Growers: Videotape
Project Leader: Timothy K. Hartz

Determination of Soil Nitrogen Content In-Situ
Project Leader: Shrini K. Updahyaya

Educating California's Small and Ethnic Minority Farmers: Ways to Improve Fertilizer Use Efficiency Through the Use of Best Management Practices (BMPs)
Project Leader: Ronald Voss

1992
Nitrogen Management for Improved Wheat Yields, Grain Protein and the Reduction of Excess Nitrogen
Project Leader: Bonnie Fernandez

The Use of Composts to Increase Nutrient Utilization Efficiency in Agricultural Systems and Reduce Pollution from Agricultural Activities
Project Leader: Mark Van Horn