Progress 10/01/06 to 09/30/07
Outputs
Progress Report Objectives (from AD-416) Determine effect of saline soil on evapotranspiration of agonomic crops. Approach (from AD-416) Bowen Ratio equipment will be used to measure crop Et and capacitance probes will be used to measure changes in soil water. The difference will be g.w. contribution. Documents Reimbursable with Bureau of Reclamation. Log 25197. Formerly 5302-13000-009-02R (2/07). Significant Activities that Support Special Target Populations This report documents the research conducted under a Reimbursable Agreement between ARS and United States Bureau of Reclamation, Dept. of the Interior. Additional details of research can be found in the report for the in-house associated project 5302-13000-010-00D, Irrigation and Drainage Water Management to Sustain Productivity and Protect Water Quality. The three Bowen Ration systems continue in operation. The system installed at the West Side Research and Extension Center on a grass field is being used to characterize evapotranspiration (ET) for grass for comparison of the grass weighing lysimeter located adjacent to the system. The second system installed at Red Rock Ranch is monitoring a field of Jose Tall Wheat Grass being irrigated with saline water. The third unit is on loan to the Lawrence Berkeley Laboratory and is being used to measure ET in a wetland. These have been demonstrated to be very robust systems. The ET data for the crops will be used with CIMIS Et reference data to calculate crop coefficients for Jose Tall Wheat grass. Data from all systems are being analyzed and summarized and will be reported in appropriate studies. This project is monitored by submission of an annual progress report to the granting agency.
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Progress 10/01/05 to 09/30/06
Outputs
Progress Report 4d Progress report. This report serves to document research conducted under a reimbursable agreement between ARS and the Bureau of Reclamation. Additional details of research can be found in the report for the parent project 5302-13000- 009-00D "Irrigation and Drainage Water Management to Sustain Productivity and Protect Water Quality". Three Bowen Ratio systems were purchased to characterize crop water use using an energy balance calculation since other methods were not available for use in areas with shallow ground water. One system was installed at the West Side Research and Extension Center on a grass field, the second system was installed at Red Rock Ranch in a field of Jose Tall Wheat Grass that is being irrigated with saline water. The third unit was installed on a garlic crop at Red Rock Ranch and then used to determine water use from peppers and garlic being grown on the West Side Research and Extension Center. These are very robust systems.
Data from the garlic crop showed peak crop use of garlic in excess of 9 mm per day. The evapotranspiration (Et) data for the crops will be used with CIMIS Et reference data to calculate crop coefficients for the garlic and Jose Tall Wheat grass. Data from all systems are being analyzed and summarized.
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Progress 10/01/04 to 09/30/05
Outputs
4d Progress report. This report serves to document research conducted under a reimbursable agreement between ARS and the U.S. Bureau of Reclamation. Additional details of research can be found in the report for the parent CRIS 5302- 13000-009-00D Irrigation and Drainage Water Management to Sustain Productivity and Protect Water Quality. Three Bowen Ratio devices for measuring crop evapotranspiration were purchased and installed. These systems are currently being used to measure crop water use in Jose Tall wheat grass, peppers, and grass. The data will be used to develop crop coefficients for irrigation scheduling of crop on the west side of the San Joaquin Valley.
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Progress 10/01/03 to 09/30/04
Outputs
4. What were the most significant accomplishments this past year? D. This report serves to document research conducted under a reimbursable agreement between ARS and the U.S. Bureau of Reclamation. Additional details of this research can be found in the report for the parent project 5302-13000-009-00D Water and Nutrient Management of Nutrient Crops. This project was developed to support the modeling efforts of the USBR in shallow ground water areas located on the west side of the San Joaquin Valley. The evapotranspiration of crops being grown on the west side will be determined using the bowen ratio method. The necessary equipment has been ordered.
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