CropManage: an online decision support tool for irrigation and fertilization
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- Lorraine Benson
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1 CropManage: an online decision support tool for irrigation and fertilization Mike Cahn Irrigation and Water Resources Advisor UC Cooperative Extension, Monterey County
2 Acknowledgements Tim Hartz, Richard Smith California Department of Food and Agriculture, Fertilizer Research and Education Program UC ANR Communication Services, Bryon Noel Lee Johnson and Forrest Melton, CSUMB/NASA Grower participants Chiquita FreshExpress Tanimura and Antle Dole Vegetables
3 Salinas Valley Basin Plan Lower Salinas Nutrient TMDL Ag Order SWRCB SBX2 1
4 Tools for Managing Water and Nitrogen Fertilizer in Vegetables Soil nitrate quick test Weather-based irrigation scheduling
5 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 CIMIS weather network
6 29 DAP 41 DAP 47 DAP 65 DAP
7 Other information needs to be considered Rooting Depth Irrigation System Uniformity and Application Rate Soil Type Salinity of Water Source
8 Web-based Irrigation and N management software for lettuce
9 Integrate information from multiple sources Soil and Ranch Crop ET model Watering Recommendation CIMIS ETo Database Driven Web Application N fertilizer Recommendation Soil nitrate test Field sensors Crop N model Display and export water and fertilizer records Decision support using crop models
10 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
11 Current crops supported Vegetables: Romaine (40 and 80-inch wide beds) Iceberg (40 and 80-inch wide beds) Broccoli (summer and winter plantings) Cauliflower (summer and winter plantings) Cabbage (red and green) Spinach* Celery* Onions* Berries: Strawberry Raspberry* Blackberry*
12 How is N fertilizer rate determined Recommended Fertilizer N = from the quick nitrate test? Future Crop N uptake (Quick Test N - threshold NO 3 -N) Soil mineralization N Plant residue N
13 N uptake rate by head lettuce (40 inch-wide beds) 1.2 Fraction of maximum N uptake Fraction of crop growth period
14 Nitrogen Fertilizer Recommendation N fert = = 71 lbs N /acre N uptake (lbs/acre) Soil NO 3 -N (ppm) Jan 20 Feb 04 Feb 19 Mar 06 Mar 21 Apr 05 Apr 20 N uptake = 57 lbs/acre Soil and residue mineralization = 4.5lbs/acre SNQT Threshold = -18 lbs/acre
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17 100 Iceberg lettuce canopy cover Canopy Cover (%) Days after Planting
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19 How much water was applied?
20 Spatial CIMIS ETo Reporting
21 Irrigation System Application Rate (inches/hr)
22 Interface with UCD SoilWeb Tool
23 Replicated Irrigation Trial for Iceberg Lettuce head wt Treatment untrimmed trimmed lbs/head Grower standard (150% ETc) CropManage (100% ETc) LSD0.05 ns ns 1. Cored for region 1 carton yield CFR yield untrimmed trimmed lbs/acre ns ns ns
24 Using weather based irrigation scheduling for broccoli Marketable Yield Irrigation Treatment Applied water Crown Bunch Total inches lbs/acre Grower Standard (150% ET) CropManage (100% ET) LSD 0.05 NS
25 Summary of Commercial Lettuce Strip Trials ( ) Marketable Yield (% of Grower) Grower CropManage 33% (57 lbs N/Ac) less N applied following CropManage AVG Trial
26 Clientele interest > 550 users > 250 Ranches > 6700 visits to CM blog since Dec 2013
27 Demonstration trials with growers
28 The road ahead
29 New version of CropManage under development Microsoft.NET Framework Dedicated programmer for CM Better user-interface Faster speed More flexibility to support different types of commodities Web-service for partnering Usage reporting
30 Expanding CropManage demonstrations and development to other regions of the state Imperial Ventura Santa Barbara Santa Clara Tehama ANR Strategic Initiative CDFA-FREP CDFA-SCBG DWR Prop. 50
31 Soil moisture monitoring
32 Opportunities to partner with commercial companies by developing CM into a web service (API): Steinbeck Country Produce, Inc.
33
34 Cheaper and better satellite imagery in the future
35 Summary Web applications can be useful for repackaging research results into simple to use decision support tools CropManage has been a useful tool for helping growers improve water and N management and for assisting with research studies. Opportunities exist for expanding CM to additional commodities and adding in new features and data sources.
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