CropManage: Online Irrigation and Nutrient. Web Based Software for Lettuce Production

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1 CropManage: Online Irrigation and Nutrient Management Tool Web Based Software for Lettuce Production Michael Cahn Irrigation and Water Resources Advisor University of California, Cooperative, Monterey Co

2 Acknowledgements Tim Hartz, Richard Smith California Department of Food and Agriculture, Fertilizer Research and Education Program UC ANR Communication Services, Bryon Noel Grower participants Chiquita FreshExpress Tanimura and Antle

3 Salinas Valley Basin Plan Lower Salinas Nutrient TMDL Ag Order SWRCB SBX2 1

4 Tools for Managing Water and Nitrogen Fertilizer in Lettuce soil nitrate quick test (20 ppm NO 3 N N = 70 to 80 lbs of N/acre/ft) /f Weather based irrigation scheduling

5 Commercial Lettuce Nitrogen Fertilizer Trials 300 Standard BMP Std: 212 lbs N/Acre BMP: 146 lbs N/Acre lbs N /A Difference 66 lbs/a 50 30% reduction in N fertilizer Ave Field

6 Applied Water as Percentage of 350 Crop ET (Lettuce) Ap pplied Wa ater (% Crop ET) Avg Applied Water = 176% of Crop ET Field Number

7 Weather based Irrigation Scheduling Converting Reference ET to Crop ET: ET crop = ET ref K crop K c can vary from 0.1 to 1.2 CIMISweather network

8 29 DAP 41 DAP 1.0 Estimated Kc of Lettuce sprinkler irrigation events ient (Kc) Cro op Coeffic Sprinkler 47 DAP 0.4 Drip 65 DAP 0.2 Average Kc = 0.33 during germination with sprinklers Days after Planting

9 Other information needs to be considered Rooting Depth Irrigation System Uniformity and Application Rate Soil Type Salinity of Water Source

10 How can water and N management tools be useful for large vegetable growing operations? Large growing operations have multiple decision makers One farm manager may be responsible for >200 fields during a season Other responsibilities besides water and fertilizer N management

11 Web based Irrigation and N management software for lettuce

12 CropManage Web based Tool: Assist growers in making decisions on irrigation and nitrogen fertilizer management Intuitive, simple, quick to use. Accessible from smart phone, tablet computer, desktop computer Guide irrigation schedules using CIMIS weather data. Guide nitrogen fertilization decisions using quick nitrate test data. Maintain and share irrigation, fertilizer, and soil test records for multiple fields and farms.

13 Integrate information from multiple sources Soil and Ranch Crop ET model Watering Recommendation CIMIS ETo Database driven web application Crop N model N fertilizer Recommendation Soil nitrate test Field sensors Record display and data export Decision support using crop models

14 How is N fertilizer rate determined from the quick nitrate test? Fertilizer N = Future Crop N uptake (Quick Test N threshold NO 3 N) Soil mineralization N Plant residue N

15 100 Iceberg lettuce canopy cover (%) Observed Canop Canopy Cover Cover (%) Canopy obs = 1.01 x Canopy pred R 2 = Predicted Days Canopy after Planting Cover (%)

16 Spatial CIMIS ETo Reporting

17 Interface with UCD SoilWeb Tool

18 How much water was applied?

19 Evaluate and Document Water Management Cumulat tive Appli ied Wate er (inches s) CropManage Recommendation CropManage Recommendation Grower Application Grower Application Days after Planting

20 Steps to Using CropManage 1. Establish User Login 2. Assign to Ranch or start New Ranch 3. View Planting within Ranch or Add New Planting 4. View or enter soil tests, fertilizer, or irrigation events

21 UC Security and Privacy Policy 1. CropManage is designed to protect the privacy of grower data. 2. Current industry security standards are used (backed up to 2 other servers, encryption, secure security socket layer). 3. UC does not give out/sell grower data and is not obligated to give out data. 4. UC will not analyze grower data without first asking for permission.

22

23 Ranch Summary

24 Soil Summary Fertilizer Summary

25 Water Summary Table

26 Field Validation of CropManage Applied water Commercial Treatment sprinkler drip 1 Yield inches lbs/acre Grower Standard CropManage comparison was on last 7 irrigations Treatment Applied N Fertilizer Commercial Yield lbs per acre Grower Standard CropManage

27 The road ahead

28 Soil moisture monitoring 0 ) isture tens sion (cbars soil mo inches 18 inches Date

29 User Support: CropManage Blog

30

31 Final Thoughts Web applicationscan can repackage complex data sets and mathematical models into simple to use decision support tools CropManage is not just for growers. It is a potential tool for crop consultants and advisers to use in assisting growers with water and N management decisions. We will offer 2 hour training workshops on CropManage on March 13 and April 2, 2013.

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