Ongoing Projects

Developing Nitrogen Management Strategies to Optimize Grain Yield and Protein Content while Minimizing Leaching Losses in California Wheat (13-0267-SA)

Robert Hutmacher, Steve Orloff, Steve Wright, and Mark Lundy

Improving N Use Efficiency of Cool Season vegetable Production Systems with Broccoli Rotations (13-0268-SA)

Richard Smith, Michael Cahn, and T.K. Hartz

Phosphorus and Boron Fertilizer Impacts on Sweetpotato Production and Long-Term Storage (13-0266-SA)

C. Scott Stoddard

Assessment of Baseline Nitrous Oxide Emissions in Response to a Range of Nitrogen Fertilizer Application Rates in Corn Systems (12-0453-SA)

Martin Burger and William R. Horwath

Characterizing N Fertilization Requirements of Crops Following Alfalfa (12-0385-SA)

Dan Putnam and Stu Pettygrove

Determining the Fertilizer Value of Ambient Nitrogen in Irrigation Water (12-0455-SA)

Michael Cahn, Richard Smith, and T.K. Hartz

Developing Nutrient Management Guides from FREP Research (12-0391-SA)

Renee Pinel

Development of Economically Viable Variable Rate P Application Protocols for Desert Vegetable Production Systems (12-0386-SA)

Charles A. Sanchez, Pedro Andrade-Sanchez, and Kurt Nolte

Evaluation of a 24 Hour CO2 Test for Estimating Potential N-Mineralization to Reassess Fertilizer N Recommendations (12-0384-SA)

William R. Horwath, Martin Burger, and Jeffery Mitchell

Evaluation of N Uptake and Water Use on Leafy Greens Grown in High Density Bed Plantings and Demonstration of Best Management Practices (12-0362-SA)

Richard Smith and Mike Cahn

Fertigation Education for the San Joaquin Valley (12-0390-SA)

William Green and Kaomine Vang

Improving Nitrogen Fertilizer Management in California (12-0392-SA)

Renee Pinel

Improving Pomegranate Fertigation and Nitrogen Use Efficiency with Drip Irrigation Systems (12-0387-SA)

James E. Ayars and Claude J. Phene

Optimizing the Use of Groundwater Nitrogen for Nut Crops (12-0454-SA)

David R. Smart, Patrick Brown, Thomas Harter, and Jan Hopmans

Assessment of Plant Fertility Requirements for Agricultural Crops in California (11-0485-SA)

William R. Horwath and Daniel Geisseler

CA CCA FREP Educational Project (11-0470-SA)

Daniel H. Putnam

Determination of Root Distribution, Dynamics, Phenology and Physiology of Almonds to Optimize Fertigation Practices (11-0461-SA)

Patrick Brown

Exploring the Potential for Using Transgenic Crops for Improved Fertilizer Use Efficiency (11-0453-SA)

Charles A. Sanchez and Roberto Gaxiola

Improved Methods for Nutrient Tissue Testing in Alfalfa (11-0469-SA)

Steve Orloff and Daniel H. Putnam

Nitrogen Fertilizer Loading to Groundwater in the Central Valley (11-0301-SA)

Steve Thomas Harter, et al.

Optimization of Organic Fertilizer Schedules (11-0456-SA)

David M. Crohn and Marsha Campbell Mathews

Remediation of Tile Drain Water Using Bioreactors (11-0462-SA)

T.K. Hartz, et al.

Updating Prior Curriculum for Grades 5-8 (11-0454-SA)

Judith Culbertson and Jenna Swenson

Adjustable-Rate Fertigation for Site-Specific Management to Improve Fertilizer Use Efficiency (10-0004-SA)>Michael Delwiche

Chemistry, Fertilizer and the Environment - A Comprehensive Unit (10-0010-SA)

Judith Culbertson and Mandi Bottoms

Development of a Nutrient Budget Approach to Fertilizer Management in Almond (10-0039-SA)

Patrick Brown

Development of Leaf Sampling and Interpretation Methods for Almond and Pistachio (10-0015-SA)

European Pear Growth and Cropping: Optimizing Fertilizer Practices Based on Seasonal Demand and Supply with Emphasis on Nitrogen Management (10-0105-SA)

Kitren Glozer and Chuck Ingels

Irrigation and Nitrogen Management Web-Based Software for Lettuce Production (10-0013-SA)

Michael Cahn

Nitrogen Research and Groundwater (10-0011-SA)

Renee Pinel and Henry Buckwalter

Relationship of Soil K Fixation and Other Soil Properties to Fertilizer K Rate Requirement (10-0012-SA)

Stuart Pettygrove and Randal J. Southard

Developing Testing Protocols to Assure the Quality of Fertilizer Materials for Organic Agriculture (09-0582)

W.R. Horwath and G.S. Pettygrove

Improving Pomegranate Fertigation and Nitrogen Use Efficiency with Drip Irrigation Systems (09-0583)

James E. Ayars and Claude J. Phene

Measuring and Modeling Nitrous Oxide Emissions from California Cotton, Corn, and Vegetable Cropping Systems (09-0001)

Dave Goorahoo, Charles F. Krauter, and William Salas