Objectives
- To evaluate the performance of a potentometric nitrate sensor to two commercially available nitrate sensors for detectng nitrate transport in glass beads.
Objectives
- To evaluate the effectiveness of winter flooding as a best management practice for leaching Boron from the root zone of almond trees.
Objectives
- To estimate nitrate leaching in an irrigated processing tomato-cucumber rotation field using a three-tiered approach based on:
- Field mass balance assessments
- Shallow and deep vadose-zone monitoring
- Intensive shallow groundwater monitoring
Objectives
- This study assessed how conservation practices in sunflower cultivation affects nitrate leaching into groundwater. We employed a three-tiered approach:
- Monitoring groundwater nitrate levels
- Tracking nitrate movement through the vadose zone
- Field scale mass balance
Objectives
- Perform solute displacement experiments using soil columns packed with soils of different textures, analyzing changes in nitrate concentrations with electrochemical and optical nitrate sensors.
- Utilize the program CXTFIT to compare and evaluate the sensors' experimental versus predicted breakthrough curves (BTCs).
Objectives
- To evaluate the effectiveness of winter flooding as a management practice for leaching B from the root zone of almond trees.
Objectives
- Test three different regression strategies to examine the strength of the relationship between EMI sensor readings (ECa3, shallow and ECa5, deep reading) and predicted soil salinity (ECe, 0-120 cm):
- Field Specific Regression (FSR)
- Whole Farm Regression (WFR)
- Analysis of Covariance (ANOCOVA)
- Determine whether the examined approaches can be used to build a robust model for ECa calibration using minimal (6) ground-truthing locations.
Objectives
- Determine whether satellite time series data can guide tall wheatgrass (TWG) harvest periods and identify declining yield due to salt accumulation in root zone
- Assess the potential to use satellite imagery as a management tool for TWG production under saline-sodic irrigation
- Provide a decision support tool to the SJRIP managers to improve the long-term sustainability of forage production in the reuse facility
Objectives
- Test different commercial nitrate sensing technologies for robust and high throughput monitoring of nitrate transport through soil
- Evaluate sensor performance using the solute transport model CXTFIT